14 results on '"Askarov, Alisher"'
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2. A novel approach to validation of a positive-sequence modeling of a converter-interfaced generation with hydrogen energy storage in practical power systems.
- Author
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Suvorov, Aleksey, Askarov, Alisher, Rudnik, Vladimir, Razzhivin, Igor, and Andreev, Mikhail
- Subjects
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HYDROGEN as fuel , *HYDROGEN storage , *RENEWABLE energy sources , *GEOTHERMAL resources , *ENERGY storage , *WIND power , *HYBRID power systems - Abstract
The most important hydrogen energy storage technologies, developed between 1974 and 2022, now enable the quality operation of global power grids that integrate alternative energy facilities (wind power, solar power, geothermal power, etc.). With the continuous large-scale penetration of converter-interfaced generation (CIG), based on the combined use of renewable energy sources (RES) and hydrogen energy storage systems (ESS), into practical power systems, the dynamic characteristics of the latter change significantly. New challenges with the power system control and stability arise due to the specific CIG properties. A positive-sequence time-domain simulation is frequently used to solve them. However, the known simplifications and limitations are inevitably applied in case of such simulation. These become critical for the CIG with RES and hydrogen ESS models due to their fast dynamics. Therefore, the validation of such simulation results becomes relevant. This paper proposes a novel validation approach based on the use of a benchmark tool Hybrid Real-Time Power System Simulator (HRTSim) instead of field measurements. A major feature of the proposed approach is the possibility of a guaranteed validation of the benchmark tool using any state of the modeled power system. A hybrid implementation of a detailed three-phase model of CIG is also developed for the HRTSim, which provides an adequate simulation of the full range of dynamic processes. The results of validation of a positive-sequence simulation of a practical power system with CIG, which includes both RES and hydrogen ESS, using the developed approach presented in this paper have allowed to identify the causes of calculation errors, as well as factors affecting them. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
3. A feedforward control for increasing the damping effect of enhanced current-controlled virtual synchronous generator.
- Author
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Askarov, Alisher, Ruban, Nikolay, Bay, Yuly, Ufa, Ruslan, Malkova, Yana, and Suvorov, Aleksey
- Subjects
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SYNCHRONOUS generators , *HYBRID power systems , *RENEWABLE energy sources , *TRANSFER functions - Abstract
• Enhanced current-controlled virtual synchronous generator with feedforward controller is proposed. • Feedforward controller affects mainly the low-frequency roots without worsening VSG inertial response. • Enhanced CC-VSG ensures stable operation in a wide range of grid strength conditions. Novel grid-forming control strategies based on the virtual synchronous generator (VSG) algorithm are becoming a key technology for power converters in modern hybrid power systems. This paper considers an alternative current-controlled VSG structure (CC-VSG). However, this structure is complex third-order system and is characterized by the lack of damping torque when the grid strength changes. Therefore, in this paper an enhancement of the CC-VSG damping properties via a feedforward controller is proposed. The analysis of the closed-loop transfer function demonstrates the reduction of the model order to the second order due to the proposed controller. By analyzing the state-space model, the predominant impact of the gain of the developed controller on the low-frequency roots is proved. As a result, it is concluded that the enhanced CC-VSG structure is efficient, stable and can be flexibly tuned to obtain any desired dynamic response under different grid strength conditions and load variation. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
4. Freely Customized virtual generator model for grid-forming converter with hydrogen energy storage.
- Author
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Suvorov, Aleksey, Askarov, Alisher, Bay, Yuly, and Ufa, Ruslan
- Subjects
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HYDROGEN as fuel , *HYDROGEN storage , *ENERGY storage , *RENEWABLE energy sources , *SYNCHRONOUS generators , *REACTIVE power control - Abstract
Currently, there is a large-scale penetration of renewable energy sources (RES) in power systems around the world, most of which are based on the power converter technology. The result of such penetration is the emergence of frequency and voltage regulation problems in power systems with RESs. An effective way to solve the mentioned problems is the use of energy storage systems (ESS), among which hydrogen ESSs are promising. However, the quality of such solution mainly depends on the approach to the power converters control. One of the most effective is a grid-forming power converter control strategy. Within this strategy, many scientific groups have proposed the concept of a virtual synchronous generator (VSG). However, the existing VSG models use a series structure with a stiff direction of signals, which completely mimics conventional synchronous generators. In this regard, the fundamental problems inherent in such a structure arise, e.g., a coupling between active and reactive power control. This paper describes a freely configurable VSG model (FC-VSG), in which the structural control blocks can be transferred from one level to another, and the levels themselves can be installed not only in series, but also in parallel. The case studies carried out made it possible to identify the configuration of the FC-VSG, which excludes the fundamental problems inherent in the conventional VSG structures. At the same time, the most efficient and reliable frequency and voltage regulation is provided, which has been proved by qualitative and quantitative comparison, including with the conventional VSG structure. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
5. The comparison and analysis of Type 3 wind turbine models used for researching the stability of electric power systems.
- Author
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Razzhivin, Igor, Suvorov, Aleksey, Andreev, Mikhail, and Askarov, Alisher
- Subjects
INDUCTION generators ,ELECTRIC power system stability ,WIND turbines ,RENEWABLE energy sources ,SOFTWARE development tools ,WIND power plants ,ELECTRIC transients - Abstract
The dominant trend of the modern energy is the use of generating plants based on renewable energy sources, among which the most common is a wind power plant based on doubly fed induction generator (Type 3 WT). The large-scale introduction of Type 3 WT into the modern power systems significantly changes their dynamic properties. There are problems with ensuring the basic condition of the reliability and the survivability of power systems – the stability. The study and solution of the indicated problems is possible only with the help of the mathematical modeling of a large-scale power systems which is currently being carried out with the help of widespread purely numerical software tools of calculations of modes and processes, which are characterized by various simplifications and limitations. For the properties and capabilities of software tools for studying stability issues, mathematical models of Type 3 WT, the so-called generic models, which also have simplifications and limitations, are adapted. In this article, the reliability of stability calculations of a real power system with Type 3 WT using software tools was evaluated, which allows to identify the influence of the applied simplifications and restrictions with a purely numerical approach on the quality of solving problems of assessing the stability of power systems with Type 3 WT. Also, the studies made it possible to identify the areas of the application of generic models of Type 3 WT as a part of the model of the real dimension power system, at which the greatest and least errors arise, as well as their causes. Such a comprehensive assessment becomes feasible due to the alternative approach proposed in the article, based on the use of a detail benchmark tool model instead of the full-scale data to compare the results of modeling. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
6. A Hybrid Simulation of Converter-Interfaced Generation as the Part of a Large-Scale Power System Model.
- Author
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Razzhivin, Igor, Askarov, Alisher, Rudnik, Vladimir, and Suvorov, Aleksey
- Subjects
HYBRID computer simulation ,HYBRID power systems ,RENEWABLE energy sources ,TEST systems - Abstract
This study aims to propose an alternative hybrid approach to model renewable energy sources (RESs), which provide the most reliable results in comparison with the existing simulating tools. Within the framework of this approach, a specialized hybrid processor for modeling converter-interfaced generation (CIG) is developed. This study describes its structure and validation in the test system by comparing the results with commercial modeling tools, and also presents experimental studies of its operation as parts of the practical power system. The results obtained confirm the adequacy of the developed tools. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
7. Impact Assessment of Full-converter Wind Turbine Generators Integration on Transients in Power Systems.
- Author
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Askarov, Alisher, Andreev, Mikhail, and Ruban, Nikolay
- Subjects
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TURBINE generators , *ELECTRIFICATION , *WIND turbines , *VOLTAGE regulators , *RENEWABLE energy sources , *ELECTRIC transients , *SYNCHRONOUS generators , *WIND power - Abstract
The integration of renewable energy sources is one of the promising directions in the development of modern electric power systems. However, the use of such facilities is associated with a number of issues, which are sufficiently critical for both the integrated facilities themselves and the existing power systems. One of these problems is a significant change in the behavior of transients in the power systems with a large share of renewables. This fact is primarily associated with a decrease in the total inertia of the system due to the introduction of converter-connected generation based on renewable energy sources, in particular, integration of Type-4 wind turbine generators. The appropriate tuning of automatic voltage regulators and power system stabilizers of synchronous generators installed at conventional power plants taking into account actual operating conditions can be proposed as a solution to indicated issue to enhance stabilization of power systems with high renewable energy penetration. The article suggests using the Hybrid Real-Time Power System Simulator to implement adequate and comprehensive tuning for such automation. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
8. Wind Power Plants Influence on Out-Of-Step Operation Mode Parameters of the Power System.
- Author
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RUBAN, Nikolay, ASKAROV, Alisher, RAZZHIVIN, Igor, and UFA, Ruslan
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WIND power plants ,WIND power ,RENEWABLE energy sources ,ELECTRIC power systems ,WIND turbines ,SYNCHRONOUS generators ,POWER electronics - Abstract
One of the problems associated with the integration of renewable energy sources is reducing the total inertia of the electric power system. By substituting the traditional synchronous generators to wind turbines connected to a network via power electronics devices the system the inertia constant is sharply reduced. In addition, the inertia of the system changes over time due to the wind turbine power change. Systems with lower inertia in the serious faults incident loses its stability easier. The question of the reduction of energy system inertia influence on the out-of-step mode parameters is not answered yet. Authors created a grid test model using software-hardware hybrid simulation tool HRTSim. The several experiments to determine the influence of type 4 wind turbine on the parameters of the out-of-step mode is realized. The oscillograms confirming the influence of the wind turbine on the parameters of the out-of-step mode are obtained. Problems of the influence of changes in the inertia of the power system during the integration of type 4 wind turbines on the parameters of the out-of-step mode are considered. The international experience in this field is analysed. The results of the analysis confirmed the insufficient study of this field and the almost complete lack of information about this in the grid codes of foreign countries. The experiments confirmed the theoretical expectation: the higher inertia induction stroke starts later, and the frequency slip is decreased. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
9. The Effect of Temperature Change on the Output Characteristics of a Solar Power Plant under Partial Shading Conditions.
- Author
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Kievets, Anton, Bay, Julius, Suvorov, Aleksey, Askarov, Alisher, and Rudnik, Vladimir
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TEMPERATURE effect ,RENEWABLE energy sources ,SOLAR power plants ,MAXIMUM power point trackers ,PHOTOVOLTAIC power systems ,LUMINOUS flux ,ELECTRIC power systems - Abstract
Currently, the world is widely introducing renewable energy sources including solar power plants (SPP). In order to predict their work, it is necessary to adequately simulate the processes occurring in solar panels, not only in standard conditions, but also in conditions of partial shading. At present, the effect of partial shadowing is considered from the point of view of changes in the luminous flux, however, for a more adequate and comprehensive simulation, it is also necessary to take into account the temperature change in the shaded areas of SPP, especially considering the area of powerful SPP, the temperature of individual sections of which can radically differ, which is undoubtedly will lead to a change in the output characteristics of the SPP. Failure to take this factor into account, when modeling high-power SPP leads to results that do not correspond to real data. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
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10. Impact of renewables on relay protection operation.
- Author
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ANDREEV, Mikhail, SUVOROV, Aleksey, ASKAROV, Alisher, KIEVETS, Anton, and RUDNIK, Vladimir
- Subjects
ELECTRIFICATION ,RENEWABLE energy sources ,WIND power ,ELECTRIC power systems ,SYSTEM integration ,POWER system simulation - Abstract
Copyright of Przegląd Elektrotechniczny is the property of Przeglad Elektrotechniczny and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2019
- Full Text
- View/download PDF
11. Potential Application of HRTSim for Comprehensive Simulation of Large-Scale Power Systems with Distributed Generation.
- Author
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Suvorov, Aleksey, Gusev, Alexander, Ruban, Nikolay, Andreev, Mikhail, Askarov, Alisher, Ufa, Ruslan, Razzhivin, Igor, Kievets, Anton, and Bay, Julius
- Subjects
DISTRIBUTED power generation ,POWER system simulation ,ELECTRIC power systems ,HYBRID power systems ,RENEWABLE energy sources - Abstract
Currently, the number of distributed generation (DG) objects in the world is growing mainly due to renewable energy sources (RES). However, the integration of a large volume of DG based on RES into existing electric power systems (EPS) is associated with a number of significant problems. For a comprehensive study and solution of these problems, it is necessary to carry out detailed simulation of real EPS, which is not always feasible with the help of existing tools. Therefore, the article proposes the use of an alternative solution – the Hybrid Real-Time Power System Simulator (HRTSim). To confirm the properties and capabilities of the HRTSim, the simulation results of a test scheme obtained using the HRTSim and the widely used digital hardware-software complex RTDS were compared. The results of a comprehensive comparison in both complexes confirmed the adequacy of information about the processes in equipment and EPS as a whole, obtained by the HRTSim. Thus, it is proved that further use the HRTSim as a tool for detailed and adequate simulation of real EPS with DG will provide complete and reliable information about normal and abnormal quasi-steady-state and transient processes, which is necessary for reliable and efficient design, research and subsequent operation of EPS with DG. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
12. Influence of Renewable Energy Sources and FACTS on Out-of-Step Protection Operation.
- Author
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RUBAN, Nikolay, RAZZHIVIN, Igor, SUVOROV, Aleksey, ASKAROV, Alisher, and KIEVETS, Anton
- Subjects
RENEWABLE energy sources ,ELECTRIC power systems ,AUTOMATION equipment ,SYNCHRONOUS capacitors - Abstract
Electric power systems are becoming more complex. This is due to the widespread use of renewable energy sources (RES) and FACTS devices. At the same time, protection devices for equipment and automation of power systems are becoming subject to influence from new devices. The article pays attention to the study of such influence from the side of RES and FACTS devices on the operation of one of the most important automation systems ensuring the stable operation of the power system - out-of-step protection (OSP). At the first stage of the project, the main reasons for the difficulty of setting up resistance control devices of OSP in networks with FACTS devices and RES were identified, which are related to the fact that the parameters of these devices vary depending on the operation mode, therefore, the zone of the OSP resistance relay should also be changed. Based on the analysis, a new approach to the study of the functioning of OSP in power systems with FACTS devices and RES has been developed. The performed experimental studies confirm the theoretical research. [ABSTRACT FROM AUTHOR]
- Published
- 2019
13. Frequency control by the PV station in electric power systems with hydrogen energy storage.
- Author
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Ruban, Nikolay, Rudnik, Vladimir, Askarov, Alisher, and Maliuta, Boris
- Subjects
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ELECTRIC power systems , *ENERGY storage , *ELECTRIC transients , *HYDROGEN storage , *HYDROGEN as fuel , *PHOTOVOLTAIC power systems , *BUILDING-integrated photovoltaic systems - Abstract
The rapid growth of renewable energy capacity, in particular photovoltaic systems, is creating challenges associated with changing the rate of transient processes in the power system. This is due to the approach PV systems are connected to the grid using power converters and the absence of a rotating mass in the PV power plant. One of the most pressing challenge is the participation of PV stations in the process of frequency control in power systems, including in emergency modes. Simultaneously with PV power plants, it is efficient to use energy storage systems, including hydrogen ones. This is due to the fact that it is possible to obtain hydrogen for such energy storage systems using excess energy from PV power plants. The article proposes to solve the problem of frequency regulation in the power system by using an algorithm that allows to control the frequency in the power system using a synthetic inertia block of PV station, including at different levels of insolation and temperature of PV panels. The robustness of the proposed algorithm allows it to be used at different levels of power generated by the PV station, as well as in emergency modes. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
14. A comprehensive assessment of the state-of-the-art virtual synchronous generator models.
- Author
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Suvorov, Aleksey, Askarov, Alisher, Kievets, Anton, and Rudnik, Vladimir
- Subjects
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SYNCHRONOUS generators , *ELECTRIC power system control , *RENEWABLE energy sources - Abstract
• The synthesis of the modern VSG models into generic structures is performed. • The comprehensive assessment of the generic VSG structures is carried out. • The most reliable VSG structure for grid-connected operation is highlighted. The large-scale penetration of renewable energy sources has a significant impact on the steady-state operation and emergency control of modern electric power systems (EPS). Moreover, as a rule, the mentioned impact is negative. Therefore, the challenge associated with the development of a 'comprehensive' control strategy for renewables becomes extremely relevant. Such a strategy should ensure the same reliable operation of EPSs, as in the case of conventional synchronous generation. Among the existing directions, the concept of a virtual synchronous generator (VSG) is the most preferable. Within this paper, the synthesis and combination of the state-of-the-art concepts of VSG into generic structures has been performed. For the obtained structures, a comprehensive assessment and an experimental comparison were performed. On the basis of the results obtained, the benefits and drawbacks of the generic structures are highlighted, and a conclusion is made about the VSG structure, demonstrating the most effective and reliable operation. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
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