Transient Stability Analysis in Nine Bus Power System

Abstract

This thesis presents a comprehensive study on the transient stability analysis of a 9-bus power system using MATLAB. The transient stability analysis is a crucial component of power system analysis. The 9-bus system is a well-known benchmark system commonly used to evaluate different power system stability analysis techniques. The study starts by reviewing the fundamental concepts of power system stability, including voltage stability and transient stability. It also presents a detailed mathematical model of synchronous generators, transmission lines, and loads. The transient stability analysis of the 9-bus system is conducted using MATLAB/Simulink software. The study analyzes the response of the system to various fault conditions such as three-phase short-circuits, line-to-line faults, and single-phase faults. The study evaluates the performance of the system under different fault conditions by analyzing the critical clearing time (CCT) and maximum rotor angle deviation (MRAD). The study also incorporates different control strategies such as excitation systems, power system stabilizers (PSS), and FACTS devices, to improve the system's transient stability. The study compares the system's performance with and without the control strategies to evaluate their effectiveness. The results indicate that the 9-bus system is highly vulnerable to different fault conditions, and the use of appropriate control strategies can significantly enhance the system's transient stability. The study provides valuable insights into designing and implementing control strategies to improve power system stability. Keywords: Critical Clearing Time (CCT), power system stabilizers (PSS), maximum rotor angle deviation (MRAD)., Frequency Stability, 9 Bus Test System, Transient Stability.