不同补偿策略下UPQC主电路参数确定方法  

Parameters determination of UPQC based on different compensation strategies

作　　者：巫付专[1,2] 万健如[2] 沈虹[3] 

机构地区：[1]中原工学院电子信息学院,河南郑州450007 [2]天津大学电气与自动化工程学院,天津300072 [3]燕山大学电气工程学院,河北秦皇岛066004

出　　处：《电机与控制学报》2010年第6期71-76,共6页Electric Machines and Control

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

摘　　要：针对统一电能质量调节器(UPQC)主电路参数确定问题,以最常用左串—右并主电路结构为例,建立了其稳态等效电路和不同补偿策略下的基波相量图;对采用不同补偿控制策略时其能量流动关系进行了对比分析;在此基础上推导了串、并联侧容量的计算公式;根据能量流动的关系给出了主电路容量的确定原则;分析了直流电压波动原因,提出了直流电容的选取方法;为主电路器件的选取提供了理论依据。实验结果表明,负载电压并没有由于电网电压的跌落而受到影响。电网电流的THD值也从25.1%2,5.8%,26.6%下降到4.2%,4.8%,5.2%。Based on most common main circuit structure of left series-right shunt of unified power quality conditioner（UPQC）,steady-state equivalent circuit and fundament component phasor representation un-der different compensation strategies are established to detemined the parameters of UPQC.The compara-tive analysis of energy flow relationship with different compensation strategies was shown and the capacity calculation formulas of series and parallel sides were given.According to the energy flow relationship,the selected principle of main circuit capacity was determined.The reason of DC voltage fluctuation was ana-lyzed and the selected method of DC capacitor was proposed to provide theoretical basis for the selection.The results show that the load voltage is not affected by grid voltage drop.Grid current THD value re-duces from 25.1%,25.8%,26.6% to 4.2%,4.8%,5.2% 。

关 键 词：UPQC 补偿策略 能量流动 容量计算 电容值 

分 类 号：TM761[电气工程—电力系统及自动化]