Search

Traditional methods used for the analysis and design of power systems, like power flow studies (PFS), do not consider any uncertainties. For example, when there is a high penetration of wind power plants (WPPs), whose raw material is intermittent. In this paper is proposed a graphical probabilistic representation (GPR) based on multi-objective performance index (MPI) to assess the impact of the WPPs penetration in power systems. This representation is applied to the southeastern network of Mexico, where there is increasing penetration of WPPs. Besides, a comparative study is presented, with and without a static var compensator (SVC) device connected to the mentioned network, to evaluate the effects of shunt compensation in the point of common coupling (PCC) with WPPs. The results of this comparison are discussed using the GPR proposed. The results show that GPR can be utilized as a useful tool to represent a considerable amount of information in a clear, compact, and single visual representation.

The integration of renewable energies in the electric power system, as a solution to the growing demand for electricity in developing countries, has become a vital issue, such is the case of Mexico. The purpose of this work is the assessment of the economic and energy feasibility of a residential house grid-connected hybrid photovoltaic (PV)-wind system, in Mexico. The hybrid PV-wind system design is based on the existing renewable energy resources and considering a typical load profile. Also, an economic analysis is presented based on the two schemes approved for the sale of the surplus of the energy generated in Mexico: Net billing and net metering. The results obtained demonstrate the viability and profitability of the proposed small-size system. However, the results corroborate that government incentives are crucial to making the proposed system more attractive and affordable for residential users. La integración de energías renovables en el sistema eléctrico, como solución a la creciente demanda de electricidad en los países en desarrollo, ha convertirse en un tema vital, tal es el caso de México. El propósito de este trabajo es la evaluación de la viabilidad económica y energética de un residencial. casa sistema híbrido fotovoltaico (PV) -eólico conectado a la red, en México. El diseño del sistema híbrido fotovoltaico-eólico se basa en las renovables existentes. recursos energéticos y considerando un perfil de carga típico. Asimismo, se presenta un análisis económico con base en los dos esquemas aprobados para la venta de el excedente de la energía generada en México: facturación neta y medición neta. Los resultados obtenidos demuestran la viabilidad y rentabilidad del propuesto sistema de pequeño tamaño. Sin embargo, los resultados corroboran que los incentivos gubernamentales son cruciales para hacer más atractivo el sistema propuesto. y asequible para usuarios residenciales.

In this paper, the temporal energetic complementarity between solar and wind resources for Mexico is presented. Energetic complementarity studies are useful to assess the feasibility for the combined use of two or more renewable energy sources with high variability, over a specific interval of time, and help to identify potential sites for the installation of new generation systems. The energetic complementarity study carried out in this research is based on the Pearson correlation coefficient. This coefficient lets to know the correlation between the solar and wind resources, and with the obtained results new maps are generated showing the monthly and annual energetic complementarity in the country. Besides, for practical use of the presented maps in the analysis the natural protected areas of the country, the orography, and the location of the transmission system are included. Also, a comparison between the results obtained and the sites where have been already installed generation systems based on solar and wind energy is presented. The obtained results show that Mexico has many sites with great energetic complementarity, some of them are being exploited, but still, there are sites from the center to the north of the country which have not been exploited and where renewable energy generation systems can be developed.

Facultad de Ingeniería Eléctrica. Maestría en Ciencias en Ingeniería Eléctrica This thesis analyzes the dynamic response of a wind farm connected to a power system. The electrical network represented and analyzed considers the individual models of asynchronous wind turbines, transmission lines, transformers, capacitor banks and Distribution Static Compensator (DSTATCOM). To obtain the model of the wind farm, it was modeled in differential equations each element in the system. The dynamic response of the detailed models developed in differential equations for each of the individual components of the power system were validated with Matlab-Simulink® software. In all cases the responses obtained are practically equal, demonstrating that the response of the models reported in this thesis is reliable. The variations in wind speed in wind turbines can adversely impact the quality of the power grid fed by a wind generation system. This thesis describes and illustrates the presence of harmonics, intearmónicos and voltage depressions associated with the operation of a wind farm generation. In particular, illustrates the effect of DSTATCOM connected to a wind farm and shows its effect in correcting voltage depressions, caused by variations in wind speed in wind turbines. En esta tesis se analiza la respuesta dinámica de un parque eólico conectado a un sistema eléctrico de potencia. La red eléctrica representada y analizada considera los modelos individuales de aerogeneradores asíncronos, líneas de transmisión, transformadores, banco de capacitores y compensador estático (DSTATCOM, por sus siglas en inglés). Para obtener el modelo del parque eólico, se modeló en ecuaciones diferenciales cada elemento que componen el sistema. La respuesta dinámica de los modelos detallados en ecuaciones diferenciales desarrollados para cada uno de los componentes individuales del sistema de potencia se validaron con el software Matlab-Simulink®. En todos los casos las respuesta obtenidas son prácticamente iguales, lo cual demuestra que la respuesta de los modelos reportados en esta tesis es confiable. Las variaciones en la velocidad del viento en los aerogeneradores pueden impactar de manera adversa la calidad de la energía de la red eléctrica alimentada por un sistema eólico de generación. En esta tesis se describe e ilustra la presencia de armónicos, intearmónicos y depresiones de voltaje, asociadas con la operación de un parque eólico de generación. En particular se ilustra el efecto del DSTATCOM conectado a un parque eólico y se muestra su efecto en la corrección de las depresiones de voltaje, las cuales son producidas por las variaciones en la velocidad del viento en los aerogeneradores.

Facultad de Ingeniería Eléctrica. Maestría en Ciencias en Ingeniería Eléctrica This thesis describes the application of sparsity techniques and parallel processing to the Newton technique based on the Discrete Exponential Matrix, which allows to accelerate the convergence of the state variables to the Limit Cycle to obtain the periodic steady state solution of a power networks with linear, nonlinear and time-varying components steady. This process can be dramatically improved with the application of sparsity. To achieve this goal the library CSparse was used. In this research, the OpenMP parallel processing platform was used. The Newton methods based of Numerical Diffrentiation and Discrete Exponential Matrix procedures are compared in terms of convergence to the limit cycle. Additionally, computational efficiency is shown when parallel processing is used. The computational effort associated with the periodic steady state solution of nonlinear power networks using a conventional (Brute Force) method is described as well. Esta tesis describe la aplicación de técnicas de dispersidad y procesamiento en paralelo a la técnica Newton basada en la Matriz Exponencial Discreta que permite acelerar la convergencia de las variables de estado al Ciclo Límite para obtener la solución en estado estacionario periódico de redes eléctricas con componentes lineales y no lineales. La eficiencia de este proceso puede ser mejorado de forma significativa con la aplicación de técnicas de dispersidad, para lo cual se utiliza la librería CSparse. La plataforma que se utiliza para realizar el procesamiento en paralelo en este trabajo de investigación es OpenMP. En esta tesis se presentan comparaciones de las convergencias que tienen los métodos Newton de aceleración de la convergencia al Ciclo Límite basados en procedimientos de Diferenciación Numérica y Matriz Exponencial Discreta, respectivamente; se presentan las eficiencias obtenidas con la incorporación de procesamiento en paralelo. También se describe el esfuerzo computacional asociado con la solución computacional obtenida utilizando un método convencional de solución de Fuerza Bruta.