基于瞬时对称分量法的三相四线制D-STATCOM控制研究  

Three-Phase Four-Wire D-STATCOM Control Based on Instantaneous Symmetrical Component Method

作　　者：朱景明[1] 庞丹 王尧 王振浩[3] 

机构地区：[1]吉林省电力有限公司检修公司,长春130000 [2]长春供电公司,长春130033 [3]东北电力大学电气工程学院,吉林吉林132012

出　　处：《电测与仪表》2014年第23期48-54,共7页Electrical Measurement & Instrumentation

摘　　要：配电网中三相负载不对称,会导致三相电流电压不对称。基于瞬时对称分量法对三相电压和电流量进行分解,提出了一种新的正序、负序和零序电流直接控制方法,应用于三相四线制配电网并联型D-STATCOM(配电网静止同步无功发生器)。正序电流控制使D-STATCOM发出电网中需要补偿的无功电流和谐波电流;负序、零序电流由abc坐标系转换到dq0同步旋转坐标系与期望值0做差进行控制,用以补偿三相负荷不平衡。仿真结果表明,所提出的控制方法可以使D-STATCOM有效补偿配电网三相负荷不平衡,提高配电网功率因数,同时消除非线性负荷引起的电流畸变。The difference of three-phase load leads to the unbalance of three-phase voltage and current.Using the instantaneous symmetrical component method to decompose three-phase voltage and current, the paper proposes a new positive, negative and zero sequence direct current control method, which is mainly applied to the three-phase four-wire system that parallels D-STATCOM in the distribution network.The positive sequence current control is used to make the D -STATCOM generate reactive and harmonic current that needs to be compensated in the grid.Negative and zero sequence current is transformed from the abc coordinate system to the dq0 synchronous rotating coordinate system, and is subtracted with the expected value 0 to maintain the three -phase current bal-ance.Simulation results show that the proposed control strategy can effectively compensate the three-phase load un-balance and improve power factor at the line side, meanwhile eliminate current distortion caused by nonlinear load.

关 键 词：D-STATCOM 瞬时对称分量法 正负零序直接电流控制 三相四线制 

分 类 号：TM762[电气工程—电力系统及自动化]