摘要
直流侧电压平衡算法是链式静止同步补偿器(STATCOM)安全可靠运行的前提,然而,引入电压平衡算法使各H桥需采用独立控制,这与传统情况下载波移相调制算法的使用前提存在一定矛盾。通过理论分析了电压平衡算法对H桥级联型装置输出性能的影响.指出级联等效频率以下的整数倍载波频率及其边带谐波无法完全抵消,提出了若干种可行的提高装置输出性能的方案,并以各H桥直流侧采用不同电压值的混合级联法为例,通过实验验证了理论推导的正确性及解决方案的可行性。
DC-link voltage balance strategy is the key technique of cascaded static synchronous compensator（STATCOM） while safety and reliability are required previously.However, independent control method is necessary for each H-bridge in consideration of the voltage balance strategy, which is different from the assumption of carrier phase shifted modu- lation algorithm.The influence of the voltage balance strategy is analyzed and several feasible solutions are proposed, the experimental results validate the presented analysis.
出处
《电力电子技术》
CSCD
北大核心
2013年第2期107-108,共2页
Power Electronics
关键词
静止同步补偿器
电压平衡
输出性能
static synchronous compensator
voltage balance
output performance
