Power System Stability Optimization using Differential Evolution Tuned SSSC

Static Synchronous Series Compensator (SSSC) is the FACTs device that provides the stable and controlled power transmission. In this paper, a more intelligent and optimized SSSC system design is presented with integration of differential evolution method. The method has analyzed the disturbance and phase variation in the system and provided the angular change in phase and improvement in the signal amplitude. The impurities analysis based fitness rule is defined to provide the controlled power distribution. The implemented work is tested against the three phase fault with four integrated machines. The simulation result shows that the proposed work model has improved the stability and reduced the voltage fluctuation.

I. Introduction

Static Synchronous Series Compensator (SSSC) is the effectively important FACTs device that provides the controlled power transmission. SSSC is able to regulate the reactive and active power flow for grids and power lines. SSSC devices are having the potential to use the reference signal strength as the compensator and provide the regulation of current and phase angle. The energy storage can be operated with specification of direct voltage injection mode. The injected voltage can be maintained in a quadrature with specification of line current and phase voltage. The load angle based power flow can be controlled to regulate the transmission flow. The basic diagram of SSSC transmission is shown in fig. 1. From fig. 1, it is observed that the SSSC device basically contains a voltage source converter (VSC) which controls the power flow through connected transmission lines. The transformer based boosting is also provided to provide controlled communication. The quadrature is connected with the current line to provide the power regulation with inductive or capacitive reactance. The voltage control is here provided with phase voltage and phase angle regulator. The phase angle based voltage control is provided to regulate the injected voltage. This injected voltage can increase or decrease the phase shift between to transmission ends.