石振刚,吴跃斌,孙冲,张林浩,武超飞,李涵.新型双钳位三电平PWM整流器双平衡调制策略研究[J].电测与仪表,2022,59(1):183-189. Shi Zhenggang,Wu Yuebin,Sun Chong,Zhang Linhao,Wu Chaofei,Li han.Research on double-balanced modulation strategy of the new twin-clamp three-level PWM rectifier[J].Electrical Measurement & Instrumentation,2022,59(1):183-189.
新型双钳位三电平PWM整流器双平衡调制策略研究
Research on double-balanced modulation strategy of the new twin-clamp three-level PWM rectifier
A new type of high-voltage and high-power double-clamp three-level converter is studied. Its working principle and double-clamp working mechanism are analyzed in detail, and its current path diagram is given.The voltage balance modulation of clamp capacitor and capacitor of upper and lower buses on DC side is analyzed. According to the characteristic that the current path can not change abruptly, a balanced control method is put forward, which can satisfy the discharge path of clamp capacitor by switching the switch state.Through the analysis of 64 kinds of space vectors, the vector combination satisfying the neutral point potential balance on the DC side is obtained, and the dual-balanced modulation strategy of the double clamp three-level converter is given.Finally, the validity of the modulation method is verified by the simulation of MATLAB and the experimental platform of the controller prototype based on DSP and FPGA.
