Search

the issue of rising electricity demand in the building sector is one of the major challenges. Therefore, the Building Management System (BMS) inside the building. Since the PV, national grid, and diesel generators supplies building electrical power, so the Energy Management System (EMS) technologies are necessary to study the priority of PV to supply building power to save energy. This paper proposes a Smart Building Management System (SBMS) used with Heating, Ventilation, and Air Conditioning (HVAC) in addition lighting systems. HVAC is controlled with occupancy sensors, temperature control, and load control. Lighting systems are controlled through occupancy sensors and daylight sensors to make them operate to minimize electricity consumption. Using Artificial Neural Network (ANN) control of the EMS in this work, SBMS and EMS are created and simulated using two case studies to supply public buildings. The first situation is SBMS without EMS and the second situation is SBMS with EMS. Finally, the results showed the impact of SBMS on the reduction of energy consumption for HVAC systems and lighting (20% on summer day and 11% on winter day), as the energy consumption was reduced for both HVAC and lighting by about (54% on a summer day and 44% on a winter day) because we added the scenario of case two to the one scenario case in a public building. [ABSTRACT FROM AUTHOR]

In 21st century people are habituated with using all kind of smart devices. Many researchers have been done in last decade to make the human life more comfortable and convenient. Smart devices play a vital role to ensure the comfort to our daily life and simultaneously it makes the system more energy efficient and accurate. In this paper the smart IoT based washing machine source of the supply comprises with three different segments: 1. Conventional power source, 2. Solar power, 3. Battery back-up that's why the prototype is named as Tribrid. The washing machine can consume electrical power for all the time whenever it requires. So, this prototype can easily solve the problem of interruption in power supply. Now, to make the motor more energy efficient brushless dc motor (BLDC) is used instead of using the conventional motor, this reduces the power consumption of the device when it is connected to the supply main. Application of Internet of Thing (IoT) makes the device smart. That means this prototype can be controlled or monitor from the remote location. The prototype is light in weight so it is portable too; this helps the consumer to move the device from any end of the house to anywhere. It is expected that this prototype will helps to reduce both the water and electrical energy consumption easily and the smartness will add some extra comfort to the consumer. [ABSTRACT FROM AUTHOR]

The main problems related to power quality are harmonics, flicker, swells, sags and voltage interruption, etc. Due to this electrical power quality has become a more concerning issue. The voltage and current quality play an important role in the power quality and if some deviation occurs in these two quantities, then power quality issues occurred. The power conditioning devices which are based on power electronics can be the best solution. One such custom device is UPQC. A system that compensates for current and voltage distortions at a time. This paper focuses on the combined operation of UPQC and distributed generation (DG). This paper shows the result of the integration of the design system with the wind energy system which can mitigate voltage sag and voltage swell and also able to minimize the load current unbalance. This model will be simulated using MATLAB. [ABSTRACT FROM AUTHOR]

In today's power scenario, the increasing power demand is a prevailing concern. The electrical power generated by non-renewable energy sources falls short in meeting this escalating demand. Utilizing renewable sources in conjunction with non-renewable energy becomes imperative. Among various renewable energy sources like wind, tidal, biomass, and solar, the latter is especially advantageous due to its widespread availability and environmentally friendly nature. However, the power generated by solar cells is influenced by atmospheric conditions, and its delivery hinges on connected loads. Achieving maximum solar cell power output is challenging due to atmospheric variations, necessitating the use of various Maximum Power Point Tracking (MPPT) methods. This paper introduces the application of the Incremental Conductance (INC) method for MPPT, which, in comparison to the Perturb and Observe (P & O) method, is better suited for tackling oscillations arising from diverse atmospheric conditions. The selection of a DC-DC CUK converter holds significance for maximizing power, offering low ripple levels at both input and output stages. The paper comprehensively covers converter design, simulation outcomes for a battery-connected standalone PV system employing the INC MPPT method [ABSTRACT FROM AUTHOR]

This research aims to contribute to ending the electricity crisis in Iraq, as it is country rich in solar energy due to its location close to the equator. Electric power stations, which use traditional fuels, are unable to provide the population's electricity needs throughout the day. Moreover, electricity distribution lines sometimes malfunction due to high temperatures. This paper recommends solar energy as an optimal solution to the electricity problem in Iraq. Because it is renewable and environmentally friendly. The paper also focused on techniques that would improve the efficiency of the solar power system. This was achieved by designing and building a solar tracking system to absorb the largest possible amount of solar energy and increase electrical energy production, in addition to building a cooling system consisting of a small pump and nozzles that pump water in the form of a volatile mist to get rid of excess heat from the solar panels at the temperature It rises to extreme levels. The system is also equipped with a cleaning mechanism to rinse the solar panel once, which is harmful to getting dirt and dust because dust is the negative factor that affects the generation capacity of the solar panels. The solar tracking system and the cleaning system are operated by a control unit made in the local markets that work with the Internet of Things (LOT) system and is programmed in the Python language and depends on data completely on the Internet. As for the cooling system, it supplies energy during the day directly from the solar panel, depending on the temperature sensor. The results reveal that the solar tracking, cooling, and cleaning system has significantly improved the production capacity of the solar system and can achieve an energy gain of 39.68%. [ABSTRACT FROM AUTHOR]

Various studies for solving problems in electrical power have been published. Many of these studies are related to the development of technology to solve the problem of electrical power alone or to solve the problem of electrical power and consider the environmental impact, often referred to as green technology. This paper discusses government policy support in encouraging technology development to have an economic impact and specific constraints in technological development in electrical power concerning the economic impact compared to the technology in communication and information. [ABSTRACT FROM AUTHOR]

At present, the available buses used for public transport require large quantity of fossil fuel which creates a demand for fossil fuel, where in fossil fuels are exhaustible in nature. The main disadvantage of using fossil fuels such as petrol and diesel is air pollution, which significantly contributes for global warming. In most of the developing countries buses are large in numbers, constitutes primary mode of public transport. To make the mass transport pollution free, it is time to upgrade the existing buses to run on alternate green fuel. As air is abundant in nature which is available everywhere and sunlight is available at most of the daytime our work is focused on extracting energy from both the solar and wind, which will charge the battery of the bus running on alternate green fuel i.e., electrical energy. This bus is more efficient and carbon free as compared to buses running on fossil fuels, as it uses alternate sources to drive the bus. During daytime solar energy charges, the battery at standstill or in movement. Even during movement, the wind energy extracted is used to charge the battery. The wind energy output depends on speed of bus. The other advantage of this bus is, when any one of the requirements is not met, we can charge the battery through EV charging station in case of emergency. The bus battery charging can be managed or controlled by android system, in addition to this feature, there are other built-in features such as battery management system and battery update system, details of battery update will be shown to bus operators, based on battery update details, the operator can act based on battery condition. This paper contains the design of the solar wind powered electric bus. [ABSTRACT FROM AUTHOR]

Without the use of conductive wires, wireless power transfer (WPT). An important part of IPT are the magnetic charging pads, i.e., the wireless connections that are responsible for transmitting the required electrical power from the source-side to the components of the electric vehicles (EVs). Any misalignment of the receiver (RX) and transmitter (TX) coupling coils must be tolerated by the magnetic coupler. This paper introduces a modern charging pad called "DD-CC" that combines traditional "DD" and circular "CC" pads. In regards of coupling parameters and the misalignment impact, a comparison is made between the suggested pad and the double "DD" pad. The system is designed and evaluated utilizing finite element analysis (FEA) using "ANSYS_MAXWELL" program. The results demonstrated the efficacy of the proposed "DD-CC" pad, which offers a strong coupling coefficient of (K) = 0.300 when compare with the DD pad. MATLAB-Simulink is used to simulate a WPT system to transmit power in the range of up to 11.1 KVA over (Z2) distance class. A good efficiency of 99.24% was achieved for the designed charging pad. [ABSTRACT FROM AUTHOR]

The hybrid power supply of solar batteries is essential for the plug-in, green and smart construction of electric cars (PEV). This paper provides a framework for optimization for green power testing and PEV nutrients, balanced home batteries, and photovoltaic arrays (PVAt the same time as fulfilling domestic power and PEV demand, we are seeking to extend the domestic financing structure. The formulation of convex (CP) programming is achieved easily, based on clever domestic nano grid and computer structure. The different battery energy storage device (BESS) parameters are designed and chosen precisely. With the unequivocal optimism period viewpoint, the home BESS and electrical value criteria, such as the home BESS frequency, form and effect style of PEVs, are routinely discussed. At some point in the height time of the electricity charge that depends on the Convex programming control law in (h2V) mode and (v2H) mode BESS no longer supplied electricity from the electric power grid. [ABSTRACT FROM AUTHOR]

Grid tied operation is a working scheme of photovoltaic power system operating together with utility power grid to supply electric power to the load. In a grid connected photovoltaic system, the energy management can be applied to optimize energy utilization of photovoltaic system while keeping high reliability of power supply to the power load. Compared to voltage source inverter system, the grid connected photovoltaic system using current source inverter offers some merits such as higher quality of AC current, higher reliability of inverter, and high power factor operation. This paper discusses and analyzes characteristics of DC current component injection in a grid tied photovoltaic system using H-bridge current source inverter and transformer. Some data were presented and discussed to explore the characteristics of DC current injection of a grid connected H-bridge CSI. [ABSTRACT FROM AUTHOR]

Environmental pollution is at present a major global concern. Internal combustion engines toxic emissions are one of the primary air pollutants. To reduce the effects of fossil fuel emissions and address environmental issues, electric vehicles (EVs) are being aggressively promoted around the world. To estimate electric mobility as a good solution, almost 31% of India's population lives in cities. This number is projected to increase to 40% in 2030 and 50% in 2050. Electric-powered trains can help reduce urban air pollution, reduce emissions and improve fuel safety. In this paper, the impact of electric vehicles on grid and battery requirements in India's potential EV adoption scenario is analyzed. The government is motivating people to adopt electric vehicles. Studies suggest that high cost of electric cars, unavailability of charging infrastructure, myths related to electrical vehicles may serve as barriers to customer acceptance. On road EVs by 2030 has been called by Government of India. In this paper, the estimation has been done for number of EVs that will be sold in 2030 and the requirements of battery pack for EVs accordingly, and the electrical power required from grid for charging EVs. EV sales and other relevant details has been estimated to promote EVs. The future forecast evaluation predicted shows that by 2030, 5 to 7 percent of total electricity demand will be used to charge EVs. [ABSTRACT FROM AUTHOR]

Due to the excess use of air conditioning systems led to significantly increase the demand for electric power in the household sector. Therefore, to decrease energy consumption, it can use an Earth-Air Heat Exchanger (EAHE); it has been demonstrated to be promising method for heating and cooling applications. In this paper, simulation study was performed using ANSYS FLUENT 19.0 (CFD) program as a numerical analysis on the impact of different pipe shape and air velocity on the performance according to the climatic conditions of Baghdad-Iraq in the summer and winter seasons. The pipes shapes in EAHE system that were used are spiral, wave and straight at the same length and diameter, and it has been studied their impact on performance at different speeds (5, 10 and 15 m / s). The results of numerical analysis showed that the shape of pipes and velocity of inlet air have an effect for the temperature of outlet air and performance of EAHE. Through the results obtained, it was found that the shape of straight tube presents the best performance compared to the other two shapes of spiral and wave. Therefore, the better performance for EAHE can be achieved on operating the system at low air velocity together with straight shape for the exchanger pipe. [ABSTRACT FROM AUTHOR]

Fault location observability is an essential procedure among smart monitoring and outage management system issues used to realize self-healing networks, one of the most important characteristics of modern power systems. Further, the determination of the location of a faulty transmission line in a power grid is a vital topic to facilitate the self-healing network and to maintain the continuity of power supply. The self-healing procedure is to constantly keep the energy supplies to the customers in case of a power system configuration change such as a fault event happening on an electrical power transmission network. Self-healing is an operational aspect of electrical power networks for real-time identification and localization of faulty transmission lines for the whole power network. The implementation of PMUs as an accurate measurement device is a promising key entry for fault location and clearing utilizations. This paper proposes algorithmic models that determine the optimal number of PMUs and their placement sites to achieve a fault observable system whereas the state-estimation issue is examined. The optimization models discussed herein find a configuration of PMU locations with a least number of devices that locates any fault occurring in a transmission power network. An optimization process is presented within a nonlinear programming model coupling a synchronized phasor as well as conventional measurements. As a comparative optimization tool, a zero-one integer constraint linear program is implemented that satisfies global optimality with sufficient precision. Evolutionary algorithms such as a binary-particle swarm optimization and genetic algorithms have been adopted to characterize a fault observable power system. The algorithmic models are illustrated with an IEEE-14 bus system. Simulation results are tested on different size power systems to verify the efficacy of the proposed algorithmic approach without taking into account the fault classification, pre-fault loading conditions or considering the fault resistance. We present that this wide-area measuring implementation and its numerical results is an outstanding approach that improves the state-of-the-art in measurement driven methods regarding the finding of an optimal PMU set solution to pinpoint a fault event occurring anywhere in the power transmission grid. As proved via the numerical optimization, the mathematical and evolutionary algorithms are efficient and robust in finding some new benchmark optimal results for faulty conditions occurring in a modern power grid for any IEEE power system and case study. [ABSTRACT FROM AUTHOR]

By augmenting silicon PV cells with close to 50% efficient multi-junction cells, there is the potential to approximately double overall conversion efficiency of solar PV modules. In this paper we describe the design of a hybrid module built onto a commercial 1 m x 2 m bifacial PV module. This serves not only to harvest the energy of diffuse light, but also to carry and cool an array of small multijunction PV cells to harvest direct sunlight. The single-junction silicon PV cells of the bifacial are sealed between 2 mm thick glass windows, front and back. In our design, the MJ cells are attached to the bifacial module's front window via 5 mm square copper/ceramic substrates. Attached in front of the module is a glass sheet formed into an array of 34 mm square lenses which focus sunlight to the cells while also transmitting diffuse light to the module's silicon cells. An 8 mm diameter secondary ball lens is bonded in front of each 2 mm square MJ cell, yielding 290 x concentration, maintained at >95% geometric throughput for solar mis-pointing as far as 1° off-axis. To ensure good cooling of the MJ cell, despite its being mounted on glass, the copper wires used to carry electrical power to the sides of the bifacial module are configured to also carry heat away from the cells. The wires have 1 mm square cross section and are bonded along their full length to the glass, with thermally conductive adhesive. Thermal modeling shows that for DNI solar illumination of 1 kW/m2, the temperature drop between the MJ cells and the back convecting surface of the bifacial module is limited to 10°C. The lens array is imprinted into a full-size (1 m x 2 m), 6 mm thick sheet of glass, by a process in which the sheet is first heated to 850°C, then pressed between relatively cold molds. The focal length of these lenses is chosen to be 125 mm, slow enough at f/3.5 to limit total internal reflection losses of the diffuse light to ∼10%. To minimize shipping costs, the glass sheets and modified bifacial modules will be packed and shipped separately, for assembly on-site as complete hybrid modules, using reflective side walls. We envisage that dual axis tracking will be provided by augmentation of single axis E-W tracking now used for standard utility scale PV plants, with the addition of cross-axes to turn the modules also in the N-S direction. [ABSTRACT FROM AUTHOR]

A persistent, interminable, and affordable energy generation is an important precondition for boosting viable growth in the Islamic Republic of Pakistan. The profuse availability of renewable energy also includes waste-to-energy, and sewage. This paper proposes a workable model of the Pico-hydropower plant based on industrial/domestic wastewater by investigating the feasibility of power generation from sewage flow system. The sewage flow system should be a closed loop to prevent debris. However, in Karachi, as few of the main holes are open, the sludge with solid waste can affect the flow rate, which has an ultimate impact on generated power. An indigenous, low-cost, portable Pico-hydropower electro-mechanical model is tailored to the variable flow which does not require debris guard and slope of steam flow. This innovative, COTS designed model is used to generate electrical power from the velocity of sewage flow at different times by installing it at the sewage channel in Karachi city. The average power of 507 Watts is generated through the practical implementation of this innovative mechanical design without debris guard at the depth of 4′ on the average 0.0351 m3/s of flow rate. [ABSTRACT FROM AUTHOR]

In this paper, the causes and harms of the current electric locomotive electrical system harmonics are firstly studied and analyzed. Based on the characteristics of the harmonics in the electrical system, the Hilbert-Huang transform method is introduced. Based on the in-depth analysis of the empirical mode decomposition method and the Hilbert transform method, the reasons and solutions to the endpoint effect and modal aliasing problem in the HHT method are explored. For the endpoint effect of HHT, this paper uses point-symmetric extension method to extend the collected data; In allusion to the modal aliasing problem, this paper uses the high frequency harmonic assistant method to preprocess the signal and gives the empirical formula of high frequency auxiliary harmonic. Finally, combining the suppression of HHT endpoint effect and modal aliasing problem, an improved HHT method is proposed and simulated by matlab. The simulation results show that the improved HHT is effective for the electric locomotive power supply system. [ABSTRACT FROM AUTHOR]

This paper emphases current sharing in Luo converters which are linked in parallel manner with solar input. The photovoltaic system supplies electric power which depends on the solar radiation and temperature. The suggested scheme comprises of dual parts, the first part is PV system followed by converters joined in a parallel manner at output to produce more current. For segmenting the current at output equally between two converters, the control structure has two control loops, a current loop and a voltage loop. P, PI and PID Controllers are designed for current and voltage loops and compared through MATLAB based simulation and PI is found to be satisfactory. [ABSTRACT FROM AUTHOR]

Copper conductor has been extensively used in several application due to its high conductivity and hardness. However, copper corrosion which occurs in electrical power equipment results in corrosion-related failures. The demand for increased corrosion resistance of the impregnated electrical equipment is increasingly emerging from manufacturers. This paper presents corrosion protection for electrical power equipment using Cocos Nucifera leaf powder. Fourier Transform Infrared Spectroscopy (FTIR) is computed to observe chemical properties of inhibitor and the inhibitor efficiency was calculated using electrochemical measurement. The abilities of carbonyl compound in to adsorb on the surface of metal was the main reason Cocos Nucifera leaves powder to be good corrosion inhibitor. Electrochemical measurement shows that the presence of Cocos Nucifera leaves powder has ability to decreases the corrosion rates as the concentration of Cocos Nucifera leaf powder increases. Furthermore, inhibitor able to provide the best protective ability of copper from corrosion process due to the increments of polarization resistance. The results show that the efficiency of inhibitor was directly dependent on the concentration of inhibitor proved that Cocos Nucifera Leave is a good corrosion inhibitor. By further research, in future work, coating element of Cocos Nucifera leave to electrical equipment and the application of Cocos Nucifera leaves powder as green inhibitor to other metal can be accomplished. [ABSTRACT FROM AUTHOR]

The paper describes non-intrusive load monitoring (NILM) during energy audits of electrical networks of 0.4 - 10 kV consumers. The NILM method allows you to remotely determine the individual parameters of electrical networks and installations of consumers (industrial, municipal, agricultural, etc.). Measurements do not require access to individual installations, which provides a convenient way to collect parameter data compared to placing meters or sensors on each installation. Everything happens similarly to the "black box" method, and the subject of analysis is the total parameters of electricity at the input of the enterprise. Unlike the classic "black box", the structure and internal electrical circuit of the enterprise, passport data and possible operating modes of equipment and electrical networks are known here. [ABSTRACT FROM AUTHOR]

This paper presents the design and implementation of automatic cooling and cleaning system (ACCS) for PV modules to optimize the performance of the PV module based on electrical efficiency drop resulting from increased cell temperature at loading and dust accumulation on PV module s surfaces. An increase in PV module temperature causes a linear reduction in its performance, affecting electrical power generation. Pressurized water jets by nozzles are used to cool and clean the front surface of the PV module. The theoretical model of the PV module is verified by MATLAB/Simulink software. The operational performance of ACCS was recorded and analyzed. The experimental results showed before cooling, the maximum power produced by the PV module was 65.31W, while after cooling increased by 73.24W. Also, electrical efficiency yield of before cooling the rate of decreasing efficiency 0.052% per 1℃ while after cooling the efficiency increased by 0.13% for each decrease 1℃. [ABSTRACT FROM AUTHOR]

At present, some renewable energy researchers have their attention directed toward the possibilities of harnessing the tornado energy concept by creating an artificial vortex utilizing solar energy for electrical power generation. Given this concept trend, a new Solar Vortex Engine (SVE) was proposed, designed, and simulate at the University of Technology – Iraq (UOT). In this paper, a computational simulation was used in the ANSYS 2020 R1 program to simulate the influence of solar intensity on the vortex updraft velocity generated. Initial boundary parameters have been included for SVE geometry, intake velocity, and different solar radiation (400, 700, and 1000) W/m2, while the outlet parameter is listed as a vortex updraft velocity. The CFD results and validation showed the direct effects of radiation concentration on the air velocity of the ascending vortex, which increased by 37% when the solar intensity went from 400 W/m2 to 1000 W/m2. [ABSTRACT FROM AUTHOR]

Small hydropower is one of the most cost-effective and environmentally benign energy technologies for production of electrical power worldwide. In India, the available potential of small hydro is at about 15,000MW and small hydro can provide electricity to 120,000 unelectrified rural villages. Hence, this paper focuses the status of small hydro development in India and discusses the barriers/obstacles to the development of small hydro in India by taking government policy, economical aspects and environmental benefits of few countries into account. [ABSTRACT FROM AUTHOR]

For researchers working for electric utilities, using renewable energy sources to lessen the impact of various uncertainties on electric power networks is a hot topic. The usage of Photovoltaic (PV) systems for electricity generation would become widely accessible in the future due to a number of anticipated cost savings. Enhancing Power Quality (PQ) becomes imperative for utility-grid connected systems. In this study, the Cascaded H-bridge (CHB) architecture, which is based on solar photovoltaic (SPV) as a DC (Direct Current) source, is used to examine the performance of a grid-connected system. Simulink/MATLAB software is used for the imitation model. Imitation models are carried out for SPV connected to CHB multilevel inverter (MLI) system. The paper analyzes various parameters including solar, grid and MLI output such voltage, current and power. In this study, a comparison of 7-level, 9-level and 11-level CHB MLI is presented. Different results are analyzed and based on a comparative analysis; the imitation model results are shown to be accurate. [ABSTRACT FROM AUTHOR]

Nowadays, electric power generation (active and reactive power) is usually transmitted over long distances to consumers. The losses of power in transmission lines are always present due to the impedance of lines. The correction of the power factor (pf) has become a necessity to regulate both the flowing of reactive power and voltage levels of the electric power system. Flexible Alternating Current Transmission Systems (FACTS) are modern controller instruments, used to improve work performance and reduce losses in the network. In this paper, the use of a shunt static VAR Compensator (SVC) was studied to improve the power flow, which means the improvement of the power factor of the grid lines. A MATLAB model was simulated to calculate the amount of capacitive or inductive reactive power that is required for compensating. Also, the correction has been taken under various loads and different locations of the SVC along the AC line. The obtained results of compensation methods were analyzed and showed a high correction for power factor by a percentage of ninety-eight. [ABSTRACT FROM AUTHOR]

The new improvements in low force gadgets and remote framework has prompted a solid interest in the field of energy harvesting which is most important concepts in power electronics, most reliable and energy efficient method. Energy Harvesting is the cycle where energy is put away from different fuel sources and changed over into usable electric power. In this paper, a cantilever beam is modeled which comprises of two piezoelectric layers. The modeling and simulation of the cantilever has been performed with the help of COMSOL Multiphysics software. In the investigations, the yield power as a capacity vibration recurrence, having fixed electrical load is assessed as a component of recurrence, load impedance and acceleration operating at a resonant frequency 70.5Hz. [ABSTRACT FROM AUTHOR]

Electrical energy has become a basic need of modern society, but the provision of electrical energy is still not able to meet the needs of the community. Many potential energy sources can be converted into electrical energy. One of the potential energy sources is the flow of water that can be used for micro-hydro power plants in remote areas. This paper describes the results of research on micro hydro power plants using Archimedes screw turbines. The aim of the research was to study the effect of variations of the turbine gearbox and generator on the characteristics and performance of the Archimedes screw turbine micro hydro generator. The novelty and uniqueness of the research is that the turbine and generator are analyzed as a single system. As a single combined turbine and generator system, there will be two kinds of system characteristics, namely mechanical characteristics and electrical characteristics. There were five variations of the gearbox ratio used in the study, namely 1, 1.4, 1.56, 2.33 and 2.56. The water discharge used to drive the turbine was 2.64 l/m and the elevation angle of the turbine slope was 30°. In the 2.56 gear ratio variation, the highest rpm, voltage, current and electric power were obtained. While the largest average torque was obtained at gear ratio 1. From the results of the study obtained a relationship that the greater the gearbox ratio, the rpm, voltage, current and electric power increase, otherwise the torque produced decreases. [ABSTRACT FROM AUTHOR]

The paper considers characteristic signs of electromagnetic processes at loss of control of rectifier-inverter converter arms used in AC locomotives with collector motors. Evaluation of the power converter serviceability is based on the analysis of energy indicators of the processes and values of harmonic components of the rectified voltage. To study the electromagnetic processes in the power circuit of electric locomotives, a method based on the calculation of transients using the Duhamel integral was used. An analysis of the effect of the phase angle of voltage control on the degree of energy output into the chain of traction motors is conducted. The boundary relations of odd harmonic components of voltage, which allow to fix the fact of thyristor arm control pulses skipping, are determined. Calculated values of ratios of certain harmonics of rectified voltage, allowing to identify the particular arm, which did not open according to the normal control algorithm. [ABSTRACT FROM AUTHOR]

Building fires have become a major growing concern over time. Liquefied Petroleum Gas (LPG) is commonly used for cooking and heating, which is considered a fast flammable gas. The most important damage to LPG lies in its large quantities of leakage inside halls and closed rooms in particular. Gas fires are rapid and spread into very large areas. In this paper, early detection of the LPG leakage is addressed by relying on the technology of the internet of things (IoT). MQ-2 is used to detect gas emissions with a Node-MCU micro-controller supported by Wi-Fi service. The project is characterized by the proposal to turn off the main electrical current supply of the building, aeration of the work-site and it is sending a warning message to the owner via the IoT server. Free server approved to monitor gas leakage cases, where other preventive procedures are taken automatically. The results showed a good response from the proposed system. [ABSTRACT FROM AUTHOR]

Transmission towers are vital channels for distributing high-voltage electrical power from power plants to substations. This infrastructure is the backbone of a productive modern society. However, a number of these towers may fail due to earthquakes. This failure may disrupt the electrical network, yield a substantial amount of replacement cost, and, more importantly, interrupt recovery efforts and business operations. This paper presents attempts to analyze the seismic risk of the transmission tower by developing its fragility curve. Fragility is defined as the probability of damage exceeding a certain level, given an extensive range of seismic intensity. A finite element computational model was analyzed under a nonlinear static procedure (pushover) to obtain a nonlinear response, specifically a capacity curve. Then the fragility analysis was performed by determining certain damage states in the capacity curve. The inter-segment drift ratio (ISDR) was employed for the damage states. The result is expressed as a fragility curve that provides fundamental and rational insights into the mechanical and probabilistic performance of transmission towers. [ABSTRACT FROM AUTHOR]

Electricity is one of the most important energy resources used for human comfort. Its generation is very expensive, so it must be carefully managed. Energy management is a key to well-used electrical grid, especially in developing countries, including Iraq, which face significant challenges such as frequent outages. The grid's main feature is good management with integration of renewable energies. Photovoltaic (PV) energy systems are widely used in variety of applications. It provides an alternative solution for energy self-sufficiency, and it is also possible to share the surplus with the grid. However, the PV system is temperature and solar radiation dependent, which is regarded as a disadvantage due to weather changes. At demand response (DR), the energy produced by the PV system may have a surplus or a shortfall of electric power resulting in either loss or no energy use or service interruptions. This problem of intermittency is overcome by hybridization. Thus, if the primary source is unable to meet the entire DR, the secondary source will take over the re-possibility of supporting. In this paper, a PV-Battery-Grid system is designed, tested and modelled by MATLAB program to integrate solar energy, bank of batteries, loads and grid. The proposed system pro-vides and manages generated energy by sharing it to loads and grid. Furthermore, the total harmonics distortion values of output inverter current, ac load current, and grid current were 2.16%, 0.18%, and 0.89% respectively. [ABSTRACT FROM AUTHOR]

It is important to have a reliable and efficient system for detecting and classifying multiple faults in the electrical power system in order to ensure continuity of power supply and reduce losses and consumer complaints. The paper presents an approach that uses current and voltage measurement method and MATLAB programming to detect and classify multiple faults in transmission lines or BusBar. The results of the study showed that the current and voltage measurement method is successful in detecting and classifying multiple faults. This approach can be useful in improving the reliability of power systems and ensuring continuity of power supply. However, it is important to note that the effectiveness of the approach may depend on the specific characteristics of the power system being analyzed. Therefore, further testing and validation may be necessary before implementing this approach in real-world power systems. [ABSTRACT FROM AUTHOR]

Concerning the broadband internet access, the 5th generation technology provides the customers of electronic communication services with an excellent media content exchange, very useful applications, new services, that can be needed by any customer. The main requirement to 5G technology is to supply the customer with all desired services (internet access, TV, telephony etc.) despite the time and location. Every Operator of Electronic Communication Network must have and install telecommunication networks with excellent quality, because of the fact that the broadband 5G requires very fast connections that can provide transfer of every content and services to the customers. The 5th generation technology ensure much faster access to the net services, very reliable and very effective data exchange compared to the older stages of the same technology. This paper presents some measurements and evaluation of the parameters of the base station for transmitting 5G signals in the network of Makedonski telekom AD Skopje at one location in the center of the city Skopje with analysis of the results, and the electricity supply with solution of photo voltaic electrical power. [ABSTRACT FROM AUTHOR]

The active Filtering concept is playing a vital role in the electrical power system to balance harmonics and reactive power in transmission and distribution systems. These filters are utilizing various configurations, different control strategies, different types of components along with economic and technical considerations. To control the operation of active filters, various control strategies are adopted among which pq theory, dq theory, pwm techniques, hysteresis band control etc., are used. In this paper, how the power quality enhancement is achieved by reducing harmonics has been discussed. By using PQ-based current reference generator, shunt active power filter operation is analyzed by simulation circuit using MATLAB software. [ABSTRACT FROM AUTHOR]

Electrical energy is a vital resource and most commonly used type of energy in the world. It is an responsible for development of country's economy and it became a basic need for human life. To meet the growing demand many new developments and technologies in power generation plants are being installed, even then a space between demand and supply is continuously increasing due to depletion in conventional fuels and natural resources. Most of energy in today's world generated through conventional energy sources. Conventional energy sources are polluting and are responsible for global warming. Due to diminishing of conventional energy sources, many new methods of renewable electric power generation are evolving. to provide clean, environment friendly and sustainable energy, a novel methodology for electrical power generation is proposed by introduction of reciproscillator. This machine helps in conversion of oscillating motion of pendulums into rotational motion by intervention of reciprocating force. The couple of forces (restoring forces) drive the wheel providing constant angular speed. the obtained constant mechanical power serves as input to electrical generator. This paper describes the simulated characteristics of reciproscillator alone and combination of both reciproscillator and generator for power generation. Generation control during the dynamically varying electrical loads is described. Mathematical modeling and theoretical analysis of system are performed in order to prove the concept as usable form of energy. [ABSTRACT FROM AUTHOR]

The study outlines a methodological approach to assessing the impact of greenhouse gas emission limits on the innovative development of TPPs. The proposed methodological approach is based on a dynamic optimization territory-specific (with a breakdown into aggregated regions) production model of the country's energy sector. The authors present a list of the tasks that are solved in the electric power and heating module of the energy sector model. The paper also describes the results of the assessment of the impact of limits on CO2 emissions from thermal power plants in Russia on their innovative development in the long term. [ABSTRACT FROM AUTHOR]

Electric vehicles (EVs) are going to be more popular in near future due to environmental concerns and increasing fuel cost. One of the major issues in EVs are high charging time which results in large plugged-in time of EVs into the grid. Incorporating mutual inductance technology based Wireless Power Transfer (WPT) reduces the need for huge some of wires. WPT seems to be most promising technology in case of both stationary and dynamic scenario as it reduces the obstacle of high cost increased charging time and low energy efficiency. In this paper we mainly focus on wireless charging system in dynamic scenario by placing ferrite coils under the roads. Bidirectional way of charging refers to deliver flexibility by either charging or discharging based on demand and supply of energy system. The charging system has two main sections namely - stationary side (under the road) consists of a rectifier and charging coil, where as moving side (inside the vehicle) consists of a pickup coil which charges the battery through buck converter. Energy demand can be met during peak hours by reverse flow of energy from vehicle to grid. [ABSTRACT FROM AUTHOR]

During the operation of the vehicle's power supply system, there are inevitable deviations due both to malfunctions of system elements (vehicle generator, battery, belt drive) and failures in other electric equipment (short circuits). The paper considers the effects of loosening the generator drive belt tension, oxidation of the battery and generator terminals on the vehicle's power supply system parameters. We have found that loosening the generator drive belt tension affects the vehicle's power supply system parameters, which is translated in the current ripples within the range of (1,000 – 2,000 rpm) with a 175% deflection of the nominal value, as well as unacceptable fluctuations of currents and voltages with increasing deflection up to 250% of the nominal value. When the critical resistance value is reached between the battery and the load, the generator begins to malfunction due to a decrease in the generator's initial excitation voltage. In this case, the battery is not charged. Upon reaching the critical value of resistance between the battery and the load, the generator stops supplying current to the on-board network. Therefore, oxidation of the generator and (or) battery terminals will cause the battery's progressive discharge. Further research will be focused on the impact of generator and battery defects on the vehicle's power supply system parameters. [ABSTRACT FROM AUTHOR]

This paper presents a comprehensive emergency power control strategy for AC/DC hybrid power systems containing VSC-HVDC. Firstly, the paper analyzes the power support of the VSC-HVDC to the AC lines using the Power Transferring Relativity Factor (PTRF). Then the power adjustment of the VSC-HVDC in several different circumstances are calculated. Finally, the online power control strategies of VSC-HVDC are designed, which could rapidly control the power of the VSC-HVDC, keeping the power flow of AC lines below the upper limit. Furthermore, the strategy is proven to be effective by the simulations with EMTDC/PSCAD. [ABSTRACT FROM AUTHOR]

Wireless power transfer is becoming a main concern to everyone staring from technical producer to the user. It becomes essential to create elective techniques to produce vitality. Wireless Power Transfer can be utilized to charge electronic versatile gadgets and Electrical Vehicle also In this paper, the methods of Wireless Power Transfer is talked about and how its identified with the Wireless Power Transfer for electric vehicle is introduced. A unique Inductive force move technique is proposed. A dynamic Inductive power transfer method is proposed. A simulation and experimental implementation were conducted. The testing with different situations in terms of distance and alignment also performed where the wireless charging was achieved an efficiency of 90%. [ABSTRACT FROM AUTHOR]

The paper proposes a Power Supply Design for Electric Vehicles which contains two main sections: AC-DC rectification stage and a DC-DC conversion stage. Electric Vehicle fast-charging stations use Partial Power converter topology in DC-DC conversion stage. Partial power Converter processes a portion of the total power, rest being supplied directly to the battery. Vienna rectifier topology is used for the AC-DC rectification stage. The paper also discusses a generic battery model implemented as a load to the charger. The proposed power design system performances are verified through simulations and experimental results. [ABSTRACT FROM AUTHOR]

A new power framework is evolving that combines green resources and distribution network. It is theologically based on major themes such as widespread adoption of distributed energy technology, future fossil fuel shortages, liberalization of the electrical service industry, and the customary focus on the environmental impact of traditional electrical power generation methods. These issues are changing the way people think about traditional power generation around the world, and they are posing new challenges to the generation and distribution systems. Numerous technological obstacles await the practical deployment of microgrid. One of the most difficult tasks in a microgrid architecture is devising a compatible protection mechanism. Numerous surveys have been published on microgrid control techniques; moreover, a systematic evaluation of stratified control methods based on a variety of microgrid architectures is rarely acknowledged. The primary, secondary, and tertiary control layers all contribute to the microgrids control hierarchy. This paper provides a summary of the technical issues and potential solutions associated with microgrid, as well as to discuss some of the technical discussions surrounding the bifurcations of the same. This article compares AC, DC, and AC-DC hybrid microgrid. [ABSTRACT FROM AUTHOR]

Power electronics has the ability to control electric power in the most effective and economical way and it plays a leading role in the transmission, distribution and application of electrical power, However, the non-linear properties of power electronic devices add harmonics which greatly reduces the power efficiency and hence the Power quality has become the severe issue for both customers and utility. Many devices are designed to increase the efficiency of electricity at the customer end. Now a days, UPQC has proven to be an effective device used to alleviate power quality issues in the distribution network. It has the ability to eliminate both voltage and current based problems simultaneously. This paper presents, 3-phase 3-wires UPQC system and 3-phase 4-wires UPQC system modelled using MATLAB which is used to eliminate the power quality issues. The shunt APF of UPQC uses PQ-theory based control technique and nonlinear adaptive filter is used in the series APF of UPQC. The THD analysis is used to determine the efficiency of UPQC. On comparing the results, it can be seen that the THD value with UPQC is less, suggesting an increase in power efficiency. [ABSTRACT FROM AUTHOR]

The cantilevered beam with piezoelectric layers is known for its mechanical vibration-to-electricity conversion. This process is known as the direct piezoelectric effect, where electricity generation is under applied mechanical stress. To investigate a physical and intuitive explanation for the power characteristics of a strongly electromechanical coupled field, understanding the coupling process of the force and electric field in the cantilevered beam is of paramount importance. This paper presents the characterisation of the electric power output of the piezoelectric cantilevered beam. For that purpose, the modelling and simulation of piezoelectric cantilevers beam have been performed using the finite element method. The simulation results show that the deformation of the cantilevered beam influences the frequency attained by the model. The finding of these results may be used as a reference in the development of piezoelectric energy harvesters devices. [ABSTRACT FROM AUTHOR]

Renewable energy provides great benefit as an alternative energy as it is a type of energy that will never run out. This classification of renewable energy includes wind energy. As Malaysia is a tropical country, most of the people have air-conditioning system in their houses. This leads to higher number of people owning a heating, ventilation and air conditioning (HVAC) system in their building. This paper is focused on the electrical power generation by HVAC system, conducted and tested in a MATLAB Simulink software. The wind turbine system consists of wind turbine, Permanent Magnet Synchronous Generator (PSMG), rectifier and lithium battery. The parameters proposed accordingly referring to previous research and datasheets. Results obtained has been observed and collected from the reduction of initial wind speed from 100%, 75% and 50%. Result shows the potential generation voltage based on the speed of the wind from the HVAC system. [ABSTRACT FROM AUTHOR]

The paper considers the possibility of using intelligent recloser devices in electric networks. The analysis of the reliability of power supply in the implementation of reclosers is carried out, as well as the advantages and disadvantages of the device are determined. [ABSTRACT FROM AUTHOR]

A flow structure around a ground vehicle has been studied by many researchers using numerous methods, either computational or experimental. However, no analysis of flow field generated by a car passing under a flyover has been carried out. One of the famous simplified models of a car is the Ahmed body that has been established to investigate the influence of the flow structure on the drag. In this paper, we investigate a flow field around Ahmed body of a single cruising condition as the vehicle passes under a flyover, using a computational method with RANS equation. The main objective of this paper is to evaluate the turbulence kinetic energy and velocity magnitude developed within the wall boundary created by the flyover, to the air flow field that is generated by the Ahmed reference car. It was observed that the simulated airflow passes the vehicle was bounded by the wall of the flyover and consequently changes the pattern of the flow field. Understanding the characteristic of this flow field under a flyover is essential if one wants to maximize the recovery of the dissipated energy which, for example, can be used to power a small vertical-axis wind turbine to produce and store electrical energy for lighting under the flyover. [ABSTRACT FROM AUTHOR]

The paper deals with a new approach in analysing of the systems made of FGM using our new beam finite elements. Multiphysical analysis (weak coupled electro-thermo-mechanical analysis) and spatial continuous variation of material properties are supported. The analysis of the micro actuator with constant cross section made of FGM is presented in the paper. This simple-shaped actuator is supplied by electric current and the efficiency of the actuator is optimised. The solution results will be compared with those obtained by using solid elements of a FEM commercial program. [ABSTRACT FROM AUTHOR]

This paper presents an aggressive driving monitoring system to be applied on Public Utility Jeepneys. The system has three main components: a Graphical User Interface (GUI), Main circuitry, and the Sensors. The GUI shows how many monitored aggressive driving act the driver committed during the day of his operation. The main circuitry is where all the circuitry including the power supply is located. The sensors are the detecting device that will satisfy the conditions an aggressive driving act has been committed. In this paper, the optimization of the placement of sensors at corners was very crucial since in order to do improper lane change (cutting), a curved motion should be followed. It was determined that a sequential pattern was needed for the sensors at the corner of the jeepney to detect violations accurately. The sensors for tailgating and siding will function based on the standards derived from Department of Public Works and Highways Department Order No. 11 (DPWH-DO-11) and Land Transportation Office Administrative Order 2009-018 (LTO AO 2009-018). The values acquired from the system were statistically equal to the intended violations done by the group after checking it with goodness – of – fit test. Finally, the system proved to have a reliability of 100%. This implies that the system can detect the violation done by the jeepney driver correctly at all times. [ABSTRACT FROM AUTHOR]

The future integration on Tore Supra (TS) of the new Ion Cyclotron Heating (ICRH) ITER-like prototype antenna will be performed to achieve the final validation within plasma conditions. Along the few years of developments and electrical optimizations, this antenna went through series of thermo/mechanical and electrical tests. This paper presents the latest electrical results of the ITER Like antenna under vacuum condition inside the test bed. High RF power (60 kW) for 2 seconds pulses were performed, the paper present the first electrical performance results and focused on the experimental measurements of the current monitoring compared to electrical simulations. [ABSTRACT FROM AUTHOR]