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Advisor(s)
Abstract(s)
Os Sistemas Elétricos de Energia (SEE), são atualmente sistemas de grandes dimensões e enorme complexidade. Para ser possível uma monitorização rigorosa da segurança dos sistemas, os operadores devem conhecer em tempo real o estado do sistema do Sistema Elétrico de Energia que operam.
Tendo por base os dados disponíveis da rede, recorre-se à Estimação de Estado, para que de uma maneira rápida e fiável, seja possível obter uma “imagem” do estado do sistema.
O Estimador de Estado é um programa de cálculo numérico e estatístico, que processando um conjunto redundante de medidas provenientes da rede, permite calcular o vetor de estado e obter uma base de dados coerente e fiável que traduz o Estado do Sistema, tornando-se assim, um elemento preponderante na análise de segurança e funcionamento dos Centros de Operação e Controlo da Rede.
O principal objetivo do presente trabalho, consiste no desenvolvimento de um algoritmo de Estimação de Estado implementado na ferramenta MATLAB®, onde são analisadas diversas redes de teste, e comparados os valores medidos com os valores “estimados” em diversas simulações adotando diferentes configurações de medidas.
O algoritmo desenvolvido permite estimar grandezas que efetivamente não são medidas, e avaliar o seu grau de confiança através de metodologias de Deteção e Identificação de erros Grosseiros.
The Electrical Power Systems (EPS) are currently large systems with enormous complexity. In order to ensure strict system security monitoring, the operators must know in real time the state of the system of the Electrical Power System. Based on the data available from the network, State Estimation (SE) is used, so that an estimated image of the Network can be obtained in a fast and reliable way. The State Estimator is a numerical and statistical calculation program, which processes a redundant set of measurements and information from the network, allows the calculation of the state vector, and obtain a coherent and reliable database that translates the State of the System, which is a key element in the safety and operational analysis of the Operation and Control Centers. The main objective of the present work is the development of a State Estimation algorithm implemented in MATLAB® tool, where several test networks will be analyzed, and where the measured values will be compared with the "estimated" values in several simulations. The developed algorithm, will also allow to estimate quantities that are not effectively measured, and evaluate their degree of confidence through a routine of Detection and Identification of Gross Errors.
The Electrical Power Systems (EPS) are currently large systems with enormous complexity. In order to ensure strict system security monitoring, the operators must know in real time the state of the system of the Electrical Power System. Based on the data available from the network, State Estimation (SE) is used, so that an estimated image of the Network can be obtained in a fast and reliable way. The State Estimator is a numerical and statistical calculation program, which processes a redundant set of measurements and information from the network, allows the calculation of the state vector, and obtain a coherent and reliable database that translates the State of the System, which is a key element in the safety and operational analysis of the Operation and Control Centers. The main objective of the present work is the development of a State Estimation algorithm implemented in MATLAB® tool, where several test networks will be analyzed, and where the measured values will be compared with the "estimated" values in several simulations. The developed algorithm, will also allow to estimate quantities that are not effectively measured, and evaluate their degree of confidence through a routine of Detection and Identification of Gross Errors.
Description
Keywords
Erros Grosseiros Estimação de Estado Mínimos Quadrados Ponderados Sistemas Elétricos de Energia Bad Data Identification Electric Power Systems State Estimation Weighted Least Squares