Optimal Placement of Facts Device Based On N-1 Security and Stability for Bus Systems Using PSAT

Abstract

With increasing deregulation in the electricity markets and also overall increases in consumer demand, the components of the power system are operated increasingly nearer to their rated limits. All of this also has to be done while considering the security and reliability of the system in an economic manner. There are many promising avenues of research which investigates modifications to existing infrastructure in order to meet the changing scenario and one promising path is the addition of FACTS devices. In this work, continuation power flow is used to evaluate the risk of large voltage deviations due to outages and the optimal placement of the shunt device SVC is determined in order to alleviate this issue. Similarly, the performance index based contingency ranking method is used in order to rank the severity on line flows due to possible outages and this is used to determine the optimal allocation of the series device TCSC. This is done for IEEE 5, 14 and 30 bus system and on the WSCC 9 bus system. In addition, the effectiveness of placement and stability is evaluated for testing in time domain under perturbations such as sudden changes in load demand and threephase symmetrical faults. Simulations are done in the PSAT software