Abstract

Integrating Energy Storage (ES) with intermittent Renewable Energy Sources (RES) is critical for wide-spread adoption of RES. Such systems offer several system-level advantages such as participation in demand response programs, demand charge reduction, arbitrage to maximize time-of-use rates, and increase resilience. For efficient and cost-effective integration of ES with RES, a Multi-Port Converter (MPC) is highly desirable. An isolated Triple Active Bridge (TAB) converter for Solar Photovoltaic (PV) and battery (ES) integration is discussed in this paper. Multi-objective optimization of this topology, for interfacing 10 kVA PV-ES system with 240 V AC grid, is conducted with the objectives to reduce losses and overall volume of the MPC. Finite Element Analysis (FEA) is performed to validate the outcome of the analytical modeling based optimization procedure. A control scheme to manage power flow between AC grid, PV, and ES is designed, and several case scenarios are simulated to demonstrate advantages of the proposed approach in enabling high RES penetration.

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