DSP-based fuzzy control of bilateral IGBT PWM DC-to-AC and DC-to-DC converters for battery energy storage system

This paper presents the full digital control of a bilateral pulsewidth modulated (PWM) DC/AC and DC/DC converter for a battery energy storage system (BESS) using a digital signal processor (DSP). The concerned BESS consists of a switched-mode current-controlled rectifier (SCR) for power flow control and a bilateral buck/boost converter (BBC) for battery charging control. The gating signals for the SCR and BBC are determined at every sampling instant by a DSP-based fuzzy controller using a set of instantaneous feedback signals. The experimental results of a 0.75 kW prototype system are shown to verify the proposed control scheme