统一潮流控制器同步锁相技术研究  

Research on phase locked synchronization in unified power flow controller

作　　者：史媛[1] 江道灼[1] 周月宾[1] 

机构地区：[1]浙江大学电气工程学院,浙江杭州310058

出　　处：《电力系统保护与控制》2012年第7期37-42,共6页Power System Protection and Control

基　　金：国家高技术研究发展计划(863计划)~~

摘　　要：快速准确地锁定电网电压相位角并提取对称分量是统一潮流控制器(Unified Power Flow Controller,UPFC)控制策略的基础。提出一种基于双向同步旋转坐标系和交叉解耦消除二倍频分量的同步锁相技术,利用Matlab和UPFC小模型平台,对电网存在电压谐波、三相不对称短路及频率突变等严重干扰情况下的同步锁相性能进行了建模仿真和实验验证,并对比了这种新型锁相技术与基于Park变换的锁相技术的性能差异。仿真和实验结果表明,所提出的新型锁相技术,即使在恶劣电压环境下也能快速、准确地锁定相位,作为UPFC的同步锁相环具有更强的适应性。The rapid and accurate phase and symmetrical components detection is essential for the control of Unified Power Flow Controller （UPFC）. The novel phase locked loop （PLL） in this paper is based on double synchronous reference frames and uses decoupling to cancle out double frequency component. It uses small model platform of Matlab and UPFC to simulate the phase locked synchronization performance under the conditions of severe disturbances of voltage harmonic, three-phase asymmetric short circuit and frequency discontinuity, and compares it with the conventional phase locked loop based on Park transformation. The results of simulation and experimentation both verify the fact that the novel PLL can detect the phase fast and exactly, and has more flexibilty as the phase locked loop of UPFC. This work is supported by National High Technology Research and Development Program of China （863 Program）.

关 键 词：统一潮流控制器 同步锁相技术 双向同步旋转坐标系 交叉解耦 

分 类 号：TM46[电气工程—电器]