基于UPQC主电路容量最小的控制策略的研究  

Research of control strategy based on the UPQC minimum capacity method

作　　者：巫付专[1] 万健如[2] 沈虹[3] 

机构地区：[1]中原工学院,河南郑州450007 [2]天津大学,天津300072 [3]燕山大学,河北秦皇岛066004

出　　处：《电力系统保护与控制》2010年第11期1-5,共5页Power System Protection and Control

基　　金：国家自然科学基金资助项目(60874077);高等学校博士学科点专项科研基金资助项目(20060056054);国家质检总局公益性行业科研专项基金(200910097)~~

摘　　要：以统一电能质量控制器(UPQC)左串-右并主电路结构为研究对象,从其基波稳态等效电路入手,给出了在电压波动时并伴有相位跳变的相量图;依据主电路总容量最小的原则导出了串联补偿电压的最优注入角;基于瞬时无功理论及低通滤波器提取电源基波相电压初始相位及相位跳变角,结合总容量最小时的最优注入角确定了目标电压函数,使UPQC输出相应的补偿电压。通过仿真和实验验证了在主电路容量最小时确定串联补偿电压最优注入角的控制策略。The unified power quality conditioner（UPQC） with seris on the left and parallel on the right of the main circuit is taken as an object of the study.Based on its base wave steady-state equivalent circuit,phasor diagram with phase angle jump during voltage fluctuation is given.According to the principle of total capacity minimal of main circuit,the optimization of the angle of injection voltage is analyzed.Based on the instantaneous reactive power theory and low-pass filter extracting power fundamental waves＇ phase voltage preliminary angle and phase jumping angle,the object voltage function is defined combining with the angle of injection voltage of total capacity minimal.This object voltage function makes UPQC putting out corresponding compensation voltage.Finally,control strategy is proved by simulation and experiment that determining series compensation voltage optimal injection angle when capacity of main circuit is minimal.

关 键 词：UPQC 总容量最小 最优注入角 瞬时无功理论 

分 类 号：TM761[电气工程—电力系统及自动化]