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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
朱梦梦(1986—),男,通信作者,博士研究生,高级工程师,主要研究方向:交、直流互感器检测与故障诊断技术。E-mail:396923800@qq.com
束洪春(1961—),男,博士,教授,博士生导师,主要研究方向:电力系统新型继电保护与故障测距、故障录波、数字信号处理及数字信号处理应用。E-mail:kmshc@sina.com.cn
何兆磊(1988—),男,高级技师,主要研究方向:电能计量装置检测技术研究及应用。E-mail:archer_hzl@126.com
收稿:2021-08-03,
修回:2021-11-16,
网络出版:2022-02-16,
纸质出版:2022-03-25
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朱梦梦,束洪春,何兆磊等.接地极直流电流互感器宽频特性现场试验与分析[J].电力系统自动化,2022,46(6):166-172.
ZHU Mengmeng,SHU Hongchun,HE Zhaolei,et al.Field Test and Analysis of Broadband Characteristics of DC Current Transformer on Earth Electrode[J].Automation of Electric Power Systems,2022,46(6):166-172.
朱梦梦,束洪春,何兆磊等.接地极直流电流互感器宽频特性现场试验与分析[J].电力系统自动化,2022,46(6):166-172. DOI: 10.7500/AEPS20210803006.
ZHU Mengmeng,SHU Hongchun,HE Zhaolei,et al.Field Test and Analysis of Broadband Characteristics of DC Current Transformer on Earth Electrode[J].Automation of Electric Power Systems,2022,46(6):166-172. DOI: 10.7500/AEPS20210803006.
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.
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