CAJ | 학술논문

提出一种新型二极管钳位级联多电平拓扑,在半桥单元拓扑上增加钳位二极管,为直流电容提供单向钳位通路。在该拓扑中,只需对阀体两端单元的直流电压进行控制就可实现均压控制,且每相阀体只需2个直流电压传感器,结构简单。将拓扑拓展到三相结构,提出了二极管钳位多电平有源滤波器（APF）拓扑及其控制方法。搭建了7电平二极管钳位多电平APF仿真模型和实验样机。实验结果表明,该拓扑自均压控制和谐波补偿效果良好,控制算法简易、可行。
제출일충신형이겁관겸위급련다전평탁복,재반교단원탁복상증가겸위이겁관,위직류전용제공단향겸위통로。재해탁복중,지수대벌체량단단원적직류전압진행공제취가실현균압공제,차매상벌체지수2개직류전압전감기,결구간단。장탁복탁전도삼상결구,제출료이겁관겸위다전평유원려파기（APF）탁복급기공제방법。탑건료7전평이겁관겸위다전평APF방진모형화실험양궤。실험결과표명,해탁복자균압공제화해파보상효과량호,공제산법간역、가행。
A novel diode-clamped cascaded multilevel converter topology is proposed. The half bridge cascade cell is added a clamping diode to the DC-link capacitor, and it may provide an energy channel clamping in single direction for capacitor voltage. Via the clamping diodes, only the top and bottom cells of a phase arm need to be controlled to realize each cell＇ s capacitors voltage balance. Therefore, the DC-link voltage sensors of a phase arm are reduced to two, much less than that of traditional cascaded converter. A three-phase multilevel active power filter （APF） topology based on the proposed diode clamped cascaded multilevel converter topology is provided, and its control strategy is presented as well. A simulation model and an experiment prototype of seven-level diode-clamped cascaded multilevel APF are built. The simulation and experiment results show that the novel cascaded multilevel converter topology has good performance in voltage selbbalance control and harmonics compensation, and the control algorithm is easy and feasible.