Optimization Strategy of Flying Capacitor Bi-directional Buck-Boost Converter Based on Phase-shifted Control with Duty Ratio Compensation
In order to improve the power density of flying capacitor bidirectional Buck-Boost converter(FCBBC),an optimal control strategy based on duty ratio compensation is proposed.The left and right bridge arms of the converter are independently compensated and optimized based on the phase-shifted modulation,so that the average inductor current and current ripple of the converter are reduced under the same power level,so as to achieve the purpose of optimizing the efficiency of the converter.At the same time,a closed-loop energy control scheme for energy storage is designed based on the compensation principle,which can control the inductor current and voltage of flying capacitor effectively.Finally,the proposed optimization control scheme is validated by the physical simulation experiment platform.
Energy storage systemflying capacitorbi-directional Buck-Boost converterefficiency optimizationdecoupling control
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