基于超窄带通信与小波变换的电能质量扰动源定位方法  

Location Method Based on Ultra-Narrow Band Communication and Wavelet Transform

作　　者：王薪 WANG Xin(State Grid Hubei Electric Power Co.,Ltd.,Huanggang Power Supply Company,Huanggang 438000,China)

机构地区：[1]国网湖北省电力有限公司黄冈供电公司,湖北黄冈438000

出　　处：《通信电源技术》2023年第20期41-43,共3页Telecom Power Technology

摘　　要：在定位电能质量扰动源时,由于原始电能超窄带通信信号之间存在自扰动影响关系,难以保障不同工况下的定位准确性,为此提出基于超窄带通信与小波变换的电能质量扰动源定位方法。解调处理电能超窄带通信信号,采用低通滤波的方式处理原始电能超窄带通信信号的基带波形。在扰动源定位阶段,从线性方程组的角度出发,以电能超窄带通信信号中N个码元为基础的N元线性方程组,利用小波变换的方式对方程的唯一解进行处理,非线性扰动位参数对应的位置即为扰动源的定位。在测试结果中,设计方法可实现对不同工况下扰动源的准确定位。When locating power quality disturbance sources,it is difficult to ensure the positioning accuracy under different working conditions due to the self disturbance influence relationship between the original ultra narrow band communication signals.Therefore,a power quality disturbance source localization method based on ultra narrow band communication and wavelet transform is proposed.The article demodulates and processes electric energy ultra narrow band communication signals,using low-pass filtering to process the baseband waveform of the original electric energy ultra narrow band communication signal.In the stage of disturbance source localization,from the perspective of a linear equation system,an N-ary linear equation system based on N symbols in the electric energy ultra narrow band communication signal is used to process the unique solution of the equation using wavelet transform.The position corresponding to the nonlinear disturbance bit parameter is the localization of the disturbance source.In the test results,the design method can achieve accurate positioning of disturbance sources under different operating conditions.

关 键 词：超窄带通信 小波变换 电能质量扰动源 解调处理 低通滤波 扰动源定位 

分 类 号：TM711[电气工程—电力系统及自动化]