高电压技术2011，Vol.37Issue(8)：2024-2031,8.
三相H桥级联静止同步补偿器的控制策略
Control Scheme of Three-phase H-bridge Cascaded STATCOM
摘要
Abstract
Since mathematic model of STATCOM is coupling and nonlinear, it is difficult to decouple active and reac- tive power. Another difficult point is voltage balancing control of dc side capacitors caused by H-bridge cascaded to- pology. Consequently, the exact feedback linearization control law is derived to accomplish the linearization of STATCOM model and to realize dec0upled control of active and reactive power, and the model can be changed into two independent first-order linear system. Sliding mode control method is used to design the controller, which can solve the difficulties in adjusting parameters of traditional PI controller and to improve the robustness of the control- ler. The voltage balance of capacitors is realized based on the analysis of the single H bridge module and nearest level modulation A STATCOM model is established in the Matlab/Simulink. The results of numerical simulation show that the established model and designed controller are effective, The active and reactive power can be adjusted inde- pendently. The voltages of capacitors can be balanced well, and the system has good dynamic response which is bet- ter than the traditional PI controller, and also has robustness.关键词
级联H桥/静止同步补偿器/精确反馈线性化/滑模控制/电压平衡控制/最近电平逼近调制Key words
H-bridge cascaded/STATCOM/exact feedback linearization/sliding mode control/voltage balancecontrol/nearest level modulation分类
信息技术与安全科学引用本文复制引用
江道灼,张振华..三相H桥级联静止同步补偿器的控制策略[J].高电压技术,2011,37(8):2024-2031,8.基金项目
国家高技术研究发展计划（863计划）（2008AA052213）. （）
