Abstract
Unlike conventional batteries (lead-acid, Li-ion, etc.), the major challenge in designing the electrical interface for integrating a Vanadium Redox Flow Battery (VRFB) storage system with a solar photovoltaics (PV) source lies in simultaneous control of charging current/voltage and electrolyte flow rate for maintaining the maximum storage system efficiency besides achieving the maximum charging efficiency. This chapter discusses the control algorithm to design the optimized electrical interface for a VRFB storage system with a solar PV source. The maximum power point tracking (MPPT) has also been incorporated in a specific charging phase to enhance the power transfer efficiency. A comparative performance analysis of the control algorithms is shown in this chapter through experimental validation using a 1 kW 6 h VRFB storage system under sunny and cloudy weather conditions. The algorithms are generalized and can also be useful for scalable VRFB storage interfacing with renewable energy systems.
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