基于可变采样周期滤波算法的电网电压序分量快速提取方法  

Fast extraction method for variable samplings filter algorithm based sequence component of grid voltages

作　　者：郝捷 刘新元 何彩红 曲莹 李明贤 Hao Jie;Liu Xinyuan;He Caihong;Qu Ying;Li Mingxian(Electric Power Research Institute of State Grid Shanxi Electric Power Corporation,Taiyuan 030000,China;State Grid Shuozhou Power Supply Company,Shuozhou 036000,Shanxi,China;School of Electrical and Power Engineering,China University of Mining and Technology,Xuzhou 221116,Jiangsu,China)

机构地区：[1]国网山西电力科学研究院,太原030000 [2]国网朔州供电公司,山西朔州036000 [3]中国矿业大学电气与动力工程学院,江苏徐州221116

出　　处：《电测与仪表》2023年第10期43-47,共5页Electrical Measurement & Instrumentation

基　　金：国家重点研发计划资助项目(2017YFB0903100)。

摘　　要：快速准确地提取三相电压的序分量是提高电力电子并网系统控制能力的基本条件。针对三相不平衡电网条件下快速获取电压序分量存在的问题,文章利用可变采样周期滤波(Variable Samplings Filter,VSF)算法,对dq坐标系下的电压分量延时两个采样周期来快速分离电压正序与负序分量。通过分析该算法的噪声放大规律,进一步利用VSF算法的调节性能来限制输出信号中的噪声水平。通过MATLAB仿真和DSP实验验证了所提算法的优越性。Fast and accurate extraction of the sequence components for three-phase voltage is a basic condition for improving the control capability of power electronics grid-connected systems.Focusing on obtaining the voltage sequence component under three-phase unbalanced grid conditions,this paper uses a variable samplings filter(VSF)algorithm to rapidly separate the positive and negative sequence voltage component by delaying two sampling periods of voltage component in the dq frame.By analyzing the noise amplification rule of the proposed algorithm,the adjustment performance of VSF algorithm is used to limit the noise level in the output signal.Finally,the superiority of the above algorithm is verified by MATLAB simulation and DSP experiment results.

关 键 词：不平衡电压 可变采样周期滤波(VSF) 序分量 抗噪性能 

分 类 号：TM93[电气工程—电力电子与电力传动]