Fuzzy Logic Approach Based Novel Frequency Control Strategy by Wind Turbine Generator in a Wind-Diesel Autonomous Microgrid

Intermittency in the wind turbine generator (WTG) output power is affecting the microgrid parameters significantly, principally on the frequency of the microgrid (MG). As a result, MG experiences large frequency excursions and becomes unstable. Considering this as problem, this paper introduces a novel control strategy for WTG output power to mitigate the frequency excursions in the wind-diesel autonomous MG. In the proposed method, a conventional fixed wind power command is replaced by an optimum adaptive wind power command based on power system condition. To perform this task, fuzzy logic approach is employed by considering frequency deviation and wind velocity as inputs and change in power as output. A real time wind-diesel hybrid model is considered as test system to examine the proposed strategy. The dynamic model is developed in MATLAB and, the superiority of proposed approach in mitigating the frequency deviation is alleviated by comparing with constant wind power command based WTG.