Improved cubic boost converter based on voltage closed-loop control

Abstract

Due to the influence of environment, photovoltaic cell materials and other factors, the output voltage of small power distributed photovoltaic generation system is difficult to meet the requirements of grid connected voltage. In this paper, an improved cubic Boost converter is proposed. The main purpose of the extension is to combine the cubic Boost converter with the switched capacitor circuit to improve the voltage gain and the voltage stress of the switch is reduced by half compared with the traditional Boost. The output voltage closed-loop control system is designed by Simulink automatic code generation technology, which makes the input voltage is 12 V, stabilize the output voltage to 170 V. Using 32-bit floating-point processor TMS320F28335, an experimental prototype with input power of 300 W is intended to verify the feasibility of the circuit.

Keywords

• Cubic boost converter
• Voltage closed loop control
• Simulink code automatic generation technology