采用三相不平衡调补策略的配电网负荷试验装置稳态电能质量分析

摘要

Aiming at problems of theoretical deduction and computer simulation verification of various three-phase unbal-anced adjusting and mending strategies and advanced algorithms,a static var compensation testing platform which was able to simulate various load changes was constructed for providing convenience for field test and solving production reality. Cal-culation on three-phase unbalance degree was made by using symmetrical component method. Meanwhile,voltage and cur-rent unbalance degrees were analyzed on this testing platform for the three-phase unbalanced load adjusting and mending control system when three-phase balanced load,three-phase unbalanced load,static var compensator and nonlinear load was input. Application effects indicated that the static var compensation testing platform was able to complete real-time simula-tion on various load changes and SVC was effectively able to reduce current unbalance degree. The referred compensation control algorithm was feasible.%针对目前诸多三相不平衡调补控制策略和先进算法仅停留于理论推导和计算机仿真验证的问题,搭建了可以模拟各种负荷变化现象的静态无功补偿试验平台,为实地试验和解决生产实际问题提供方便。采用对称分量法进行三相不平衡度的计算,并在该试验平台上对三相不平衡负荷调补控制系统投入三相平衡负荷、三相不平衡负荷、静态无功补偿装置(static var compensator,SVC)和非线性负荷时的电压、电流不平衡度进行分析。应用效果表明：静态无功补偿试验平台能够完成各种负荷变化现象的实时模拟,SVC能有效降低电流不平衡度,所提补偿控制算法可行。