非线性负载配电网异常时频电流行波辨识方法  

Nonlinear load distribution network abnormal time-frequency current wave identification method

作　　者：李靖鑫 李旭锋 杨金东 唐君杰 朱梓豪 LI Jingxin;LI Xufeng;YANG Jindong;TANG Junjie;ZHU Zihao(Qujing Power Supply Bureau,Yunnan Power Grid Co.,Ltd.,Qujing 655000,China)

机构地区：[1]云南电网有限责任公司曲靖供电局,云南曲靖655000

出　　处：《电子设计工程》2024年第24期143-146,151,共5页Electronic Design Engineering

基　　金：云南电网有限责任公司曲靖供电局项目(YNKJXM20222196)。

摘　　要：异常时频电流是导致配电相位幅值发生突变的主要原因。因此,为维持非线性负载配电网的运行稳定性,准确辨识异常时频电流行波,提出非线性负载配电网异常时频电流行波辨识方法。闭环配置配电网非线性负载,完成对非线性负载配电网异常时频电流的计量。完善电流行波补偿机制,通过调节时频脉宽的方式,完成对非线性负载配电网异常时频电流行波的辨识。实验结果表明,上述方法的应用可将异常时频电流幅值与标准相位之间的差值控制在0~1.0 A的数值范围之内,符合精准计量异常时频电流的应用需求。电网主机依照辨识结果就可以维持非线性负载配电网的运行稳定性,从而解决了配电相位幅值发生突变的问题。Abnormal time-frequency current is the main cause of sudden changes in distribution phase amplitude.Therefore,in order to maintain the operational stability of nonlinear load distribution networks and accurately identify abnormal time-frequency current traveling waves,a method for identifying abnormal time-frequency current traveling waves in nonlinear load distribution networks is proposed.Closed-loop configuration of non-linear loads in the distribution network,completing the measurement of abnormal time-frequency currents in the distribution network with non-linear loads.Improve the current traveling wave compensation mechanism by adjusting the time-frequency pulse width to identify abnormal time-frequency current traveling waves in nonlinear load distribution networks.The experimental results show that the application of the above method can control the difference between the amplitude of abnormal time-frequency current and the standard phase within the numerical range of 0~1.0 A,which meets the application requirements of precise measurement of abnormal time-frequency current.The power grid host can maintain the operational stability of the nonlinear load distribution network based on the identification results,thereby solving the problem of sudden changes in distribution phase amplitude.

关 键 词：非线性负载 配电网 时频电流行波 配电闭环 电流谐波 

分 类 号：TN391[电子电信—物理电子学]