| 引用本文: | 姚钢,方瑞丰,李东东,周荔丹.链式静止同步补偿器的直流电容电压平衡控制策略[J].电力系统保护与控制,2015,43(18):23-30.[点击复制] |
| YAO Gang,FANG Ruifeng,LI Dongdong,ZHOU Lidan.DC capacitor voltage balancing control of cascaded static synchronous compensator[J].Power System Protection and Control,2015,43(18):23-30[点击复制] |
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| 摘要: |
| 直流侧电容电压平衡是链式静止同步补偿器安全稳定运行的前提。针对直流电容电压不平衡现象做出分析，提出了一种叠加有功电压矢量的直流电容电压平衡控制策略。通过上下层分层控制和叠加有功电压矢量调整控制信号，使得有功功率能按需分配以弥补各级联模块间损耗的差异。上层控制通过解耦实现总体有功、无功功率控制，下层控制通过叠加有功电压矢量实现电容电压平衡控制。该策略物理意义明确、算法简洁、与其他控制量无耦合。通过基于Matlab的时域仿真和实验证明了该策略的正确性、有效性和可行性。 |
| 关键词: 静止同步补偿器 直流电容电压平衡 有功电压矢量叠加 分层控制 级联多电平 |
| DOI：10.7667/j.issn.1674-3415.2015.18.005 |
| 投稿时间：2014-12-15修订日期：2015-04-01 |
| 基金项目: |
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| DC capacitor voltage balancing control of cascaded static synchronous compensator |
| YAO Gang,FANG Ruifeng,LI Dongdong,ZHOU Lidan |
| (College of Electrical Engineering, Shanghai University of Electric Power, Shanghai 200090, China;
Department of Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China) |
| Abstract: |
| DC capacitor voltage balance is the prerequisite for the safe and stable operation of static synchronous compensator (STATCOM). After analyzing the phenomenon of imbalance of DC capacitor voltage of cascaded static synchronous compensator, a method based on active power vector addition is presented to solve this problem. Through adding active power voltage vector and hierarchical control (the upper and the lower control), control signals can be adjusted and active power can be distributed on demands to supply the loss difference among the cascaded modules. The upper control realizes the whole active and reactive power control by decoupling, the lower control realizes voltage balancing control by adding active power voltage vector. The tactic is clear of physics meaning, simple of algorithm and few coupling among control signals. Simulation results based on Matlab/Simulink and experimental results verify that the presented tactic is correct, effective and workable. |
| Key words: static synchronous compensator DC capacitor voltage balancing control active power voltage vector addition hierarchical control cascaded multilevel |
