直流充电桩快速变化的电流和电压波形模态特性分析  

Modal characteristics analysis of current and voltage waveform withfast-changing in DC charging station

作　　者：袁瑞铭 巨汉基 焦东翔 李松竹 王学伟[2] YUAN Ruiming;JU Hanji;JIAO Dongxiang;LI Songzhu;WANG Xuewei(Metrology Center,State Grid Jibei Electric Power Company Limited,Beijing 100045,China;School of Information Science and Technology,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]国网冀北电力有限公司计量中心,北京100045 [2]北京化工大学信息科学与技术学院,北京100029

出　　处：《电测与仪表》2024年第5期38-43,59,共7页Electrical Measurement & Instrumentation

基　　金：国家电网有限公司科技项目(5700-202314248A-1-1-ZN)。

摘　　要：针对电动汽车充电桩输出电流和电压呈现出“随机性、波动性、时变性”的快速变化特性,引发电能计量较大超差问题,文章建立充电桩快速变化直流电流和电压的随机信号数学模型及其时频域表征模型;提出快速变化波形模态提取方法,提取了6类12种快速变化直流波形模态,提出并构建了幅度域8个特征参量数学模型,表征影响电能计量的电流和电压特征;提取了典型特征参量数值和重要特性,该特征参量数值和特性可为制定直流电能表动态误差的测试评价试验条件提供理论依据。Aiming at the problem that the output current and voltage of the electric vehicle charging pile show the fast-changing characteristics of“randomness,volatility and time-varying”,which leads to the problem of large out-of-tolerance of electric energy metering,a random signal mathematical model of the fast-changing DC current and voltage of the charging pile is established,and its time-frequency domain characterization model is established.A fast-changing waveform mode extraction method is proposed,and 12 fast-changing DC waveform modes of 6 categories are extracted.A mathematical model of eight characteristic parameters in the amplitude domain is proposed and constructed to characterize the current and voltage characteristics that affect the energy metering.The typical characteristic parameters and important characteristics are extracted.The value and characteristics of the characteristic parameter can provide a theoretical basis for formulating the test and evaluation test conditions for the dynamic error of the DC electricity meter.

关 键 词：汽车充电桩 电能信号 波形模态提取 特征参量模型 典型特征 重要特性 

分 类 号：TM910.6[电气工程—电力电子与电力传动]