基于数字量输出的直流电压测量装置频率传变特性研究及误差分析  

Research on Frequency Transmission Characteristics and Error Analysis of DC Voltage Measurement Device Based on Digital Output

作　　者：张旭乐[1] 陈刚[2] 王群锋 杨向阳 ZHANG Xule;CHEN Gang;WANG Qunfeng;YANG Xiangyang

机构地区：[1]许继集团有限公司 [2]国家电网公司电能计量重点实验室(国网江苏省电力有限公司营销服务中心) [3]国网河南省电力公司直流中心

出　　处：《计量与测试技术》2023年第3期25-29,共5页Metrology & Measurement Technique

基　　金：国网江苏省电力有限公司科技项目(项目名称:直流测量装置采集终端优化设计及现场标源一体化校验技术研究,项目编号:J2021074)。

摘　　要：随着直流工程数字化发展需求的增加,直流电压测量装置的数字处理回路由二次控制室移至一次设备场,传变回路除阻容分压外,还增加了各种抗干扰滤波回路,因此,在保证直流电压信号可靠传变的基础上,需对各次谐波的频率特性进行研究。本文基于各构成部件电路传变模型的频率响应研究和仿真计算,得到模拟信号调理及滤波回路是影响频率响应误差的关键因素。并基于整机频率响应测试结果,验证了各构成部件传变累加误差与试验测试结果基本一致。With the increase of the requirements for the digital development of DC engineering,the digital processing loop of DC voltage measuring device is moved from the secondary control room to the primary equipment field.Besides the resistance and capacitance voltage division,various anti-interference filtering loops are also added to the transformer loop.Therefore,on the basis of ensuring the reliable transmission of DC voltage signal,the frequency characteristics of each harmonic wave should be studied.Based on the frequency response research and simulation calculation of the circuit transmission model of each component,it is concluded that the analog signal conditioning and filtering loop is the key factor affecting the frequency response error.Based on the frequency response test results,it is verified that the cumulative error of each component is basically consistent with the test results.

关 键 词：直流电压测量 数字量 频率响应 误差 

分 类 号：TM933.2[电气工程—电力电子与电力传动]