Autonomous Power Reserve Control for Cluster of Photovoltaic Sources in Microgrids

This paper presents a control scheme for cluster of photovoltaic (PV) sources in microgrids to mitigate the short-term power transients and accomplish a controllable power reserve. The proposed control scheme results in constant PV power generation under highly fluctuating PV ambient conditions in an adaptive fashion to limit the feed-in power to the grid and achieve constant power generation (CPG). The PV power operating setpoint regulation i.e. power reserve, can be adjusted based on grid operator command or state of charge (SoC) of central battery energy storage system. The power set-point adjustment and coordination are achieved in a decentralized manner. The controller hardware in the loop (C-HIL) testing of the proposed system is carried out using the Typhoon HIL 402 system and various test conditions have been emulated to verify the theoretical expectations of the proposed control scheme.