Implementation of Droop Control in DFIG Based Wind Turbines

Abstract

Wind energy is the renewable energy which will plays a major role of electrical energy generation in near future, but due to irregular nature of wind, there will be problems in power system reliability and stability. Normally used doubly-fed induction generators (DFIGs) do not take part in frequency regulation whether short or long term. But it is very important to use wind generators for autonomous frequency regulation. In this paper we will achieve this with droop control i.e., torque droop and power droop methods are introduced in DFIG based units and also studied about how both techniques participated in  frequency stability. Sensitivity reviews, with respect to the presence of turbine and inverter-based machines in micro-grids and wind speed changes and independent mode operation with only wind-generators are conducted. to get better results fuzzy logic controller is used. Time-domain simulation is used to check the analytical results.