Frequency Stabilization of Stand-Alone Microgrid with Tuned PID Controller

Abstract

Frequency deviation is a major concern in a power network due to the frequent load changes. The stand-alone hybrid microgrid is developed with wind/solar systems with MPPT techniques, and this system also faces frequency instability due to the source and load variations. PID controllers are used to mitigate the frequency deviation in the proposed stand-alone hybrid microgrid. The PID controller parameters are optimized using the Ziegler-Nichols method. The system is developed in MATLAB Simulink, and the proposed Ziegler-Nichols tuned PID controllers maintain the system frequency within the IEEE standards under both source and load variations.