Evaluation of voltage fluctuation in electric power system with wind power generators

For the purpose of studying the impacts upon grid voltage characteristics two types of wind power generators (IG : Induction Generators and PMSG : Permanent Magnet Synchronous Generators) are assumed to be connected to the grid and numerical simulation is carried out under the condition of sudden short circuit disturbance. The obtained results shows their performance of voltage support, in which PMSG gives a better performance both during and after the fault.

I. Introduction

The solar power and wind power generations are essential part of the renewable energy source which use environment-friendly generation scheme now being introduced in all parts of the world. Their penetration has been accelerated in our country with “Kyoto Protocol” (COP3) held at the end of 1997. It is assumed that the photovoltaic generation 4.82 million kW and the wind power generation 3 million kW will be in operation in the real power grid.