接地极直流电流互感器宽频特性现场试验与分析  

Field Test and Analysis of Broadband Characteristics of DC Current Transformer on Earth Electrode

作　　者：朱梦梦 束洪春[2] 何兆磊[3] 林聪 朱全聪 马御棠 ZHU Mengmeng;SHU Hongchun;HE Zhaolei;LIN Cong;ZHU Quancong;MA Yutang(Electric Power Research Institute of Yunnan Power Grid Co.,Ltd.,Kunming 650217,China;Faculty of Electric Power Engineering,Kunming University of Science and Technology,Kunming 650500,China;Measurement Center of Yunnan Power Grid Co.,Ltd.,Kunming 650041,China)

机构地区：[1]云南电网有限责任公司电力科学研究院,云南省昆明市650217 [2]昆明理工大学电力工程学院,云南省昆明市650500 [3]云南电网有限责任公司计量中心,云南省昆明市650041

出　　处：《电力系统自动化》2022年第6期166-172,共7页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(52037003);云南省重大科技专项计划资助项目(202002AF080001);云南省基础研究计划资助项目(202001AT070096)。

摘　　要：接地极直流电流互感器的宽频测量性能对直流输电系统控制保护意义重大,由于缺乏现场宽频特性试验技术和关键设备,一直未开展有效的现场检测。文中结合接地极实际运行工况,提出了一种接地极直流电流互感器宽频特性现场试验技术。研制了基于数字物理仿真的小型化高频电流源及一体化宽频试验装置,解决了多类型标准信号高准确度采集、提取以及数据同步的难题。为了降低现场试验对高频电流源容量的要求,建立了现场宽频试验一次回路等效分析模型,提出减小回路面积的两种可行方案,并在现场完成接地极直流电流互感器直流分量、频率响应、直流分量叠加谐波检测,验证了所提方法的有效性。The broadband measurement performance of DC current transformer on earth electrode is of great significance to the control and protection of DC transmission systems. Due to the lack of field broadband characteristic test technology and key equipment, the effective field detection has not been carried out. Combined with the actual operation conditions of earth electrodes,a field test technology of broadband characteristics of DC current transformer on earth electrode is proposed in this paper. A miniaturized high-frequency current source and an integrated broadband test device based on digital physical simulation are developed, which solve the problems of high-accuracy acquisition, extraction and data synchronization of multiple types of standard signals. In order to reduce the requirements of field test for the capacity of high-frequency current source, the equivalent analysis model of primary circuit in field broadband test is established, and two feasible schemes for reducing the loop area are proposed.The DC component, frequency response and DC component superposition harmonic detection of DC current transformer on earth electrode are completed on site, which verify the effectiveness of the method.

关 键 词：接地极 一次回路 直流电流互感器 频率响应 宽频特性 

分 类 号：TM452[电气工程—电器]