Effect of AVR and PSS on Power System Transient Stability with Different Wind Generation Technologies

Abstract

In the last decade, wind generation has been the fastest growing energy source globally. However, higher penetration of wind energy into existing power networks raises concern for power system operators and regulators. In this paper, we investigate the effect of wind farms employing doubly-fed induction generators (DFIGs) on the transient stability of power systems. We carried out simulations to demonstrate and compare the transient performance of the standard 3-machine 9-bus system with and without wind power integration during a fault. We analyzed the generator technology mentioned, replacing one synchronous generator in the system. We also analyzed the mentioned system after introducing the automatic voltage regulators (AVR) and power system stabilizers (PSS) into the system. We simulated the system using DIgSILENT PowerFactory. Our results show that a better transient performance is achieved with the inclusion of DFIGs in the system. There is also a further improvement of the transient stability after including both the AVR and PSS in the simulations.

Keywords: Squirrel cage induction generators, Doubly-fed induction generators, Transient stability, Automatic Voltage Regulator, Power System Stabilizer.