Design and Analysis of an Indirect control Strategy for Reactive VAR Compensation in single-phase AC Microgrid system

Integration of non-conventional sources of energy via power electronic interface with the contemporary AC micro-grid gives new challenges for maintaining the power quality (PQ). These interfaces being static in nature different control mechanisms are embedded inside the voltage source converter (VSC) to provide requisite VAR compensation. In this paper a d-q based decoupled indirect current control technique is proposed for appropriate VAR compensation. The proposed controller is used to provide appropriate switching sequence via SPWM scheme. Moreover, a detailed mathematical analysis and indirect control strategy is presented. The effectiveness of the proposed control logic designed is validated through MATLAB simulation.