Voltage and Frequency Stability Enhancement of Islanded Network

Abstract

Nowadays, for economic and environmental reasons, power systems usually work close to the limits of stability to make the most of existing networks. However, in such systems, sudden faults can cause severe instability between all equipment of the system. As a result, the voltage and frequency of the island system exceed the allowable limit. Due to this fact, voltage and frequency control is essential in the operation mode of the island. This paper investigates the effect of ramp rejecting electric power pre-filter stabilizer (RRPP) on voltage and frequency oscillations of a stand-alone network. It provides a taxonomy of the dynamic behavior of the system in various scenarios: no power system stabilizer (PSS), conventional PSS, and RRPP stabilizer. The accurate model of BESS and wind turbine is incorporated to cope with real conditions. Small signal analysis is used to evaluate and analyze the stability of the understudy network using the proposed method.