Multi-Objective Control Strategy for Residential DC Distribution System Based on PIMPC

Inhalt:
DC residential systems are becoming optimal alternatives for integrating local renewable energy and residential loads because of low power losses and high power quality availability. In this paper, a novel Partially Isolated Multi-Port Converter (PIMPC) with six bidirectional ports is proposed to integrate PV, energy storage, utility grid and loads in DC residence. The power stage, operation principle and power flow control model are analyzed in detail. Besides, a multi-objective control strategy is designed to enable power control between sources and loads, reduce power exchange between DC residence and the grid, maximize PV utilization, avoid overcharge and overdischarge of storage and regulate all supplied voltages. Finally, a simulation model is built in Matlab and the results validate the feasibility of the proposed topology and control strategy.