CAJ | 학술논문

由于MMC特殊的拓扑结构，基于MMC的STATCOM有很多的优点，但这种拓扑也使得电容电压平衡控制成为难点。针对MMC STATCOM直流侧电容电压不平衡问题，通过分析MMC STATCOM的数学模型，基于解耦变换将有功和无功解耦分离，提出通过系统直流电压控制和基于排序的均压控制来平衡其直流侧电容电压的策略。系统直流电压控制用来确定电容电压稳定基准值和有功功率的交换，基于排序的均压策略用来平衡每个桥臂上所有子模块的电容电压。通过Matlab/Simulink仿真表明，该方法可以有效地稳定STATCOM直流侧电压。
유우MMC특수적탁복결구，기우MMC적STATCOM유흔다적우점，단저충탁복야사득전용전압평형공제성위난점。침대MMC STATCOM직류측전용전압불평형문제，통과분석MMC STATCOM적수학모형，기우해우변환장유공화무공해우분리，제출통과계통직류전압공제화기우배서적균압공제래평형기직류측전용전압적책략。계통직류전압공제용래학정전용전압은정기준치화유공공솔적교환，기우배서적균압책략용래평형매개교비상소유자모괴적전용전압。통과Matlab/Simulink방진표명，해방법가이유효지은정STATCOM직류측전압。
Due to its unique topology, the STATCOM based on MMC has many advantages, but this unique topology also makes the voltage balancing control of DC side capacitors more difficult. Aiming at the DC side capacitor voltage unbalancing of STATCOM, through the analysis of MMC STATCOM mathematical model, decoupling separation of the active and reactive based on the decoupling transformation, a strategy of DC voltage control and voltage-sharing based on sort algorithm to balance the DC side capacitor voltage is proposed. The steady value of capacitors voltage and active power exchange are determined by the DC voltage control and the capacitor voltage balanced by voltage-sharing based on sort algorithm. Simulation results show that this method can effectively stabilize the DC side’s voltage of the MMC STATCOM.