电网技术2011，Vol.35Issue(11)：74-79,6.
单相H桥级联静止同步补偿器反馈线性化解耦控制
Control Scheme of Decoupled State Feedback Linearization of Single-Phase H-Bridge Cascaded STATCOM
摘要
Abstract
Electric locomotive is a kind of single-phase rectified and fluctuating load, and single-phase H-bridge cascaded static synchronous compensator （STATCOM）, which is a strongly coupled nonlinear system, can be applied to electrical railway system to compensate reactive power. To decouple active and reactive power, through leading in feedback linearization method and by means of coordinate transformation and state feedback, active and reactive power are completely decoupled and an precise linearization model is attianed, and a closed-loop controller is developed. To keep capacitance voltage balancing at DC side of H-bridge, the outer voltage loop is combined with individual balancing control to make capacitance voltage keeping its set value. Meanwhile, adopting the strategy of carrier phase-shifted sinusoidal pulse-width modulation （CPS-SPWM）, a higher equivalent switching frequency is implememted under lower device switching frequency. Numerical simulation results show that the proposed control strategy is correct and effect; active and reactive power can be independently adjusted and dynamic performance of the system is satisfied, and the set value of capacitor voltage can be maintained.关键词
单相级联H桥/静止同步补偿器/精确反馈线性化/独立均压控制/载波相移正弦脉宽调制Key words
single-phase cascaded H-bridge/static synchronous compensator （STATCOM）/exact feedback linearization/individual balancing control/carrier phaseshifted sinusoidal pulse-width modulation （CPS-SPWM）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..单相H桥级联静止同步补偿器反馈线性化解耦控制[J].电网技术,2011,35(11):74-79,6.基金项目
国家863高技术基金项目（2008AA05Z213）. （）
