Evaluation of transient stability margin of a power system containing multiple FACTS devices

Abstract

This paper discusses the effect of simultaneous use of one shunt and one series FACTS device on the transient stability condition of a power system. The devices used are thyristor controlled series compensator (TCSC) and static synchronous compensator (STATCOM). The transient stability condition is assessed using trajectory sensitivity analysis (TSA). The TCSC is modeled by a variable capacitor, the value of which changes with the firing angle. The STATCOM is modeled by a voltage source connected to the system through a transformer. The system used for the analysis is the WSCC 3-machine, 9-bus system. It is shown that TSA can be used to determine the optimal locations and suitable operating conditions of the two devices for transient stability improvement.

Improvement of Transient Stability Using Different-Different FACTS Devices

“…The performance of the designed system is evaluated in the frequency domain and by appropriate time-domain simulations based on the non-linear model among various scenarios. Chatterjee D. et al [4] this article deals with the effect of the simultaneous use of a serial shunt and a FACTS device on the state of transient stability of an electrical system. Thermistor-controlled series compensators (TCSC) and synchronous static compensators (STATCOM) are used as devices.…”

“…Unified Power Flow Controllers (UPFC) was used to improve the voltage stability in the transmission line. GA is an algorithm to optimally locate the UPFC which is used to control the voltage stability and angle of sending and receiving end bus [4]. Optimal allocation of multiple facts device under different overload conditions to improve the power transfer capability and voltage profile of the system by PSO algorithm [5].…”