CAJ | 학술논문

在传统子模块电容均压策略下，模块化多电平变流器( MMC)开关器件存在开关频率高、开关损耗大的缺点。对此，提出了一种改进的子模块电容均压策略。在原有电容电压排序法的基础上，通过设定子模块电压最大允许偏差值以及当前桥臂子模块开通数目来决定子模块的开通选择。分析了单纯依靠子模块电压偏差值确定子模块开通信号存在的问题。最后通过Matlab/Simulink软件仿真验证了该策略的有效性。
재전통자모괴전용균압책략하，모괴화다전평변류기( MMC)개관기건존재개관빈솔고、개관손모대적결점。대차，제출료일충개진적자모괴전용균압책략。재원유전용전압배서법적기출상，통과설정자모괴전압최대윤허편차치이급당전교비자모괴개통수목래결정자모괴적개통선택。분석료단순의고자모괴전압편차치학정자모괴개통신호존재적문제。최후통과Matlab/Simulink연건방진험증료해책략적유효성。
In traditional sub-module capacitor voltage equalizing strategy, the modular multilevel converter ( MMC) exists the defect such as the switching frequency of switching devices is high and the switching losses are high, thus the improved sub-module capacitor voltage equalizing strategy is proposed. On the basis of existing capacitor voltage sequencing method, through setting maximum allowable deviation of the sub-module and the current number of opening bridge arms of sub-module, to decide the opening selection of sub-module. The problems existing in the method that determining sub-module opening signal only depending on the value of sub-module voltage deviation are explained and analyzed. Finally, the effectiveness of this strategy is verified through Matlab/Simulink software simulation.