Voltage and Frequency Stabilization of a Hybrid Autonomous System Using SMC-Based STATCOM Equipped with BESS

This paperwork focuses on a hybrid microgrid framework, which consists of various energy sources like a micro-hydro-based SEIG (22 kW) and a photovoltaic system (18 kW). Both the energy sources are interfaced by a bidirectional converter (BDC) which acts as a STATCOM. At the DC side of STATCOM, along with PV, a battery energy storage system is connected. During heavy/light loading condition, the power (reactive and real) generated by SEIG is insufficient, which further tends to fluctuation in system voltage and frequency. Since the STATCOM has capability of transferring power in bidirectional way, hence, the STACOM stores the excess real power in the BESS and supplies it when required by the system, and one of the major advantages of STACOM is it enhances the quality of power throughout the system. The entire hybrid system is subjected to three loads, i.e., dynamic, nonlinear, and linear loads. The entire system is simulated using Simulink/MATLAB environment, and the results are studied.