Dynamic Performance and Effectiveness of Voltage Disturbances on the Improvement of Power Quality for Grid-Connected DFIG System Based Wind Farm

Abstract

Quality of power is known as any power problem manifested as a non-standard frequency, current and voltage which cause failure of end customer apparatus. The wind utilization, generation and its penetration in utility grid are increasing worldwide. One of the master problems in wind generation is the connection to the network. When the wind energy is injected into grid generally controls the voltage disturbances on the system power quality, variation of voltage is the almost prevalent kind of disturbance which affects stability and the quality of power for grid-connected wind energy system. This study investigates the two widespread kinds of voltage variations such as voltage dip and swell, which can happen if large amount of wind system is connected to an electrical grid. This research also studies the response and performance under faults of a wind farm inserted to distribution systems. In this paper, a wind turbine with induction machine (DFIG) system is simulated by using MATLAB/Simulink software. The simulated model is subjected to disturbances which known as; voltages (dip and rise). The results of simulation presents that, how both variations; voltage dip & voltage rise lead to mal-operation as well as shut-down of entire system, therefore deteriorating the improvement of power quality for the grid.