UPFC并联侧双环控制策略的研究Research on Double-loop Control Strategy for Shunt Inverter of Unified Power Flow Controller
刘永江,康积涛,李林,张学群
LIU Yong-jiang,KANG Ji-tao,LI Lin,ZHANG Xue-qun(College of Electrical Engineering
摘要(Abstract)：
从统一潮流控制器(UPFC)并联侧系统数学模型出发,设计了UPFC并联侧双环控制系统,内环用电流解耦控制器实现dq轴电流解耦,外环用d轴控制直流电容电压,q轴控制节点电压的PI控制方式,同时加入电流前馈控制环节和电流反馈控制环节,提高了系统精度和响应速度。仿真系统采用高电压等级,并使用标幺值方法分析和计算各类控制器的参数,通过仿真验证了所设计系统的准确性和有效性。
On the basis of the mathematical model of unified power flow controller(UPFC) shunt inverter system,a double-loop control system of UPFC shunt inverter is designed.The dq axis current decoupling is realized with decoupling controller for internal loop.And the proportional integral(PI) control mode is adopted for external loop,in which the d axis controls DC capacitor voltage and q axis controls node voltage.Meanwhile,the current feedforward and feedback control links are added so as to improve the precision and response velocity of the system.The high voltage level is adopted in the simulation system,in which per unit value method is used to analyze and calculate the parameters of all kinds of controllers.The accuracy and validity of the designed system are proved through simulation.
关键词(KeyWords)：
UPFC;电流;前馈;反馈
unified power flow controller;current;feedforward;feedback
基金项目(Foundation):
作者(Author):
刘永江,康积涛,李林,张学群
LIU Yong-jiang,KANG Ji-tao,LI Lin,ZHANG Xue-qun(College of Electrical Engineering
DOI: 10.19585/j.zjdl.2011.07.001
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