Analysis and Design of Robust PID Controller for Grid Voltage Control of Islanded Microgrid Using Genetic Algorithm

The Microgrid is a pool of various distributed generation units as well as different types of loads. Due to uncertainty of unknown loads, variation occurs in the overall performance of the microgrid. This work reflects the robust Proportional-Integral-Derivative controller design for an islanded microgrid to control the grid voltage. The controller parameters are tuned with the novel optimization technique called Genetic Algorithm. The controller is designed to get robustness, zero steady state error and quick response with respect to un-modeled, non-linear, dynamic and harmonic loads. MATLAB/Simulink's SimPowerSystems platform is used to test the performance of the system with the proposed controller. The observations from the simulation point outs good performance and the robust nature of the proposed controller for voltage control of islanded microgrid system with outcome of performance measure such as rise time, peak time, percentage of overshoot, and settling time are less.