MPPT Based Bi- Directional DC-DC Converter for Stand Alone Systems

Abstract

The Field Programmable Gate Array FPGA controlled solar photo voltaic (SPV) system is proposed in this paper. The Bi-Directional DC-DC Converter BDC is proposed for charging the battery during day hours and discharging of battery during night hours by operating in buck and boost modes respectively. For buck mode PID controller is preferred and TYPE 3 controller for boost mode of operation of BDC and implemented on FPGA. Besides the BDC, the maximum power point tracking MPPT charge controller is also designed with constant voltage maximum power point tracking CVMPPT and used in FPGA after conversion in digital domain form.