QPR控制器参数对变流器弱电网适应能力的影响  

The Effect of the Quasi Proportional Resonant Controller’s Parameters on the Adaptability of the Converter to the Weak Grid

作　　者：黄现莲 冯向东[2] 张新闻[1] HUANG Xianlian;FENG Xiangdong;ZHANG Xinwen(School of Electrical and Information Engineering,North Minzu University,Yinchuan 750021,Ningxia,China;Department of Mechanical and Electrical Engineering,Ningxia Business Vocational College,Yinchuan 750021,Ningxia,China)

机构地区：[1]北方民族大学电气信息工程学院,宁夏银川750021 [2]宁夏工商职业技术学院机电工程系,宁夏银川750021

出　　处：《电气传动》2020年第2期28-34,共7页Electric Drive

基　　金：国家自然科学基金项目(51867001);北方民族大学中央高校基本科研业务费专项资金(2018XYZDX05)。

摘　　要：控制器参数会严重影响到并网变流器的弱电网适应能力,首先建立了变流器的诺顿等效电路模型,并对其输出阻抗进行了求解。在此基础上,针对目前被广泛应用在变流器控制中的准比例谐振控制器,采用阻抗比判据深入研究了比例系数和控制器带宽对变流器弱电网适应能力的影响。结果表明,当比例系数增大至原来的2倍时,变流器的弱电网适应能力可提高至原来的2.48倍;当带宽减小至原来的至原来的1/2时,变流器的弱电网适应能力可提高至原来的2.37倍。最后,搭建了系统仿真模型和实验样机,仿真和实验结果证明了理论分析的正确性。The controller parameters have a serious impact on the grid-connected converter's adaptability to the weak grid.First,the Norton's equivalent circuit model of the converter was built,and the output impedance of the converter was solved.Based on this,for the quasi proportional resonant controller which is widely used in the converter's control,the impedance ratio criterion was used to deeply research the effect of the proportionality coefficient and the controller bandwidth on the converter's adaptability to the weak grid.The results show that if the proportionality coefficient is increased to two times than before,the converter's adaptability to the weak grid will be increase to two point forty-eight times than before,and if the bandwidth is reduced to half of before,the converter's adaptability to the weak grid will be increased to two point thirty-seven times than before.Finally,the simulation model and the experimental prototype of the system were built and the simulation and experimental results confirm the validity of the theoretical analyses.

关 键 词：并网变流器 弱电网 准比例谐振控制器 控制器参数 阻抗比判据 

分 类 号：TM461[电气工程—电器]