Power quality enhancement of wind generators connected to grid

Abstract

The wind power generation is rapidly growing and the use of wind farms and other distributed power generation systems have drastically increased. According to IEC standard, the power quality is determined from the performance of wind generators. In this paper using a FACTS controller device the power quality enhanced when the wind generators are connected to the grid system. The power quality becomes an issue when wind generators are connected to the grid, due to the interaction between the grid and the wind turbines. The main impact on the grid by the wind generators, regarding power quality, is related to voltage sag, reactive power, harmonics, power peaks and flickers. The power quality problem arises when the wind generators are equipped with the grid, can be improved by connecting a FACTS controller at a point of common coupling. In this paper, UPFC (UNIFIED POWER FLOW CONTROLLER) control scheme for the wind generators connected grid is used to improve the power quality using MATLAB/SIMULINK in power system block set. Also this UPFC control system that includes both the shunt converter and the series converter has been simulated. In this proposed model, the real and reactive power compensation is the main concern.