PMSG Based Standalone Distributed Generation Integrated Universal Active Filtering System

Advancements in digital electronics, process control, and communications have raised the quantity of sensitive loads that need supply voltages to be ideal sinusoidal for proper functioning. So, a power quality (PQ) enhancement strategy is presented in this paper using a universal active filtering system (UAFS) for a standalone distributed generation system (DGS) supplying power to sensitive or nonlinear load. The main components of this standalone DGS consist of a permanent magnet synchronous generator (PMSG) driven by a hydropower prime mover as primary source, and solar photovoltaic as well as battery source with bidirectional DC-DC converter as backup. Here, the qualities of voltages are improved by utilizing a series connected voltage source inverter (VSI) of UAFS by regulating the voltage across load as harmonics free and constant amplitude, irrespective of any PMSG generated voltage deviation. The power indices at the source terminals like current harmonics, power factor, reactive power, etc. are enhanced by the parallel connected VSI, simultaneously with voltage qualities enhancement by series VSI of UAFS. The fundamental signals of nonlinear current through load are obtained by means of the modified generalized integrator (mGI) control technique while extracting real and reactive power terms for efficient PQ improvement during various circumstances. The current qualities at the generation side and voltage qualities across sensitive load are concurrently improved and ensures to follow IEEE standards for the presented DGS though the use of UAFS.