On-Line Transient Stability and Security Evaluation Using Lyapunov and Pattern Recognition Methods,

摘要

The report consists of six chapters which may be broadly divided into three sections (1) feasible on-line Lyapunov method, (2) synthesis of transient security functions using pattern recognition techniques,and (3) new approaches for construction of stability boundary. A brief description of transient security assessment by step-by-step integration,Lyapunov and pattern recognition methods are also given. Simplified method to obtain transient stability regions of multimachine systems using Lyapunov method is demonstrate. Type of model used for such on-line studies is discussed. Results for practical multimachine (4 & 9machines) systems are also included. Some new approaches for construction of stability boundary are given.--In particular two methods,namely backward integration and generalized Zubov's method,are discussed.