Voltage Regulator Using Sliding Mode Controller for Inverter Based Islanded Microgrid

Abstract

In this paper, a nonlinear sliding mode controller is designed for a linearized model of a constant DC voltage renewable source-based inverter. The inverter-based renewable DC voltage source system constitutes as a microgrid. The microgrid is located at distribution network side and generates power according to power demand in a specific region. Thus, a proposed controller is designed for islanded microgrid to achieve better performance and stability. The stability convergence of the control law is analyzed through Lyapunov stability theorem. The proposed controller improves overall system performance in presence of initial parameter variation by reducing over/under shoots, settling time, and oscillations. In addition, the proposed controller regulated inverter-based DG switching level so that it minimizes the voltage fluctuations. The performance, stability, and ability to keep in synchronism of the proposed control scheme are validated on an inverter-based battery storage model simulated in MATLAB©.