Transient Stability of Power Systems


Book Description

Three Belgian researchers (U. of Liege) look at one unified approach to on-line dynamic security assessment and control to enable a power system to withstand unexpected contingencies without experiencing voltage or transient instabilities. The problem has greatly increased since deregulation, when utilities are being operated much closer to their limits in order to generate private profit. Their approach is called Single Machine Equivalent, SIME to its friends, and is a hybrid direct-temporal method that processes information about the system behavior in order to get one-shot stability assessment in the same way as direct methods. Preventative SIME relies on time-domain programs to get information about simulated stability scenarios of anticipated contingencies, and emergency SIME uses real-time measurements that take into account the actual occurrence of a contingency. Annotation copyrighted by Book News, Inc., Portland, OR







Power System Transient Stability Analysis Using the Transient Energy Function Method


Book Description

This book details the state of the art in the development and application of the transient energy function (TEF) method as a tool for power system transient stability assessment. It provides both the analytical foundations of the TEF method and the practical issues involved in the application of the method to analyze power systems. Of primary interest to electric utility engineers who need to understand and apply the technique, as well as engineers in research organizations involved in research and development projects on power system dynamics, and utility engineers interested in the use of the TEF method as a tool for dynamic security assessment.







Steady-state voltage stability assessment method


Book Description

Atualmente os sistemas elétricos altamente carregados estão enfrentando um crescente risco de estabilidade de tensão na medida que restrições ambientais e incertezas econômicas limitam o investimento em novas linhas de transmissão. Uma revisão dos problemas ocorridos em vários países indicam claramente que o problema de estabilidade de tensão é real e que o pior ainda está por vir [1]. Portanto existe a necessidade do desenvolvimento de ferramentas analíticas capazes de prever o colapso de tensão em redes complexas. Estas ferramentas devem ser capazes de quantificar com precisão as margens de estabilidade e os limites de transferência de potência, identificando os pontos fracos e as áreas susceptíveis á estabilidade de tensão. Um método para determinação das condições de estabilidade local de tensão é mostrado. A eficiência computacional desta ferramenta analítica é enfatizada em estudos de análise de cotingência. Estudos comparativos mostram a influência do modelo da carga estática, dos equivalentes de redes e da representação dos limites de geração ou absorção de potência reativa a partir da curva de capabilidade da máquina síncrona, no índice que avalia a estabilidade local de tensão. Um estudo sobre o determinante da matriz que serve como índice que avalia a estabilidade local de tensão. Neste trabalho são propostos novos estudos para dar continuidade aos avanços obtidos até o momento.













Use of Voltage Stability Assessment and Transient Stability Assessment Tools in Grid Operations


Book Description

This book brings together real-world accounts of using voltage stability assessment (VSA) and transient stability assessment (TSA) tools for grid management. Chapters are written by leading experts in the field who have used these tools to manage their grids and can provide readers with a unique and international perspective. Case studies and success stories are presented by those who have used these tools in the field, making this book a useful reference for different utilities worldwide that are looking into implementing these tools, as well as students and practicing engineers who are interested in learning the real-time applications of VSA and TSA for grid operation.