分流器型直流电流互感器信号处理系统研究

Abstract
Figure/Table
References
Related Citation (0)

Download: PDF (876 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Compared with fiber optical current transformer (FOCT), shunt-type DC current transformers exhibit advantages of simpler structure, higher temperature stability, and better cost- effectiveness. However, in DC power transmission system applications, they face the challenge of balancing small current measurement accuracy with a wide dynamic range. This paper proposes a signal processing method based on dual-range independent analog-to-digital converter (ADC) sampling technology, which enhances measurement accuracy through a high-precision differential conditioning circuit. The primary-auxiliary dual ADC architecture achieves 0.2% error at 10% rated current while maintaining a 15 times rated current dynamic range. An intelligent switching algorithm with a hysteresis threshold prevents range oscillations. Experimental validation result shows that the prototype maintains an error meeting the Class 0.2 requirement of the IEC 61869-14 standard within the ±5 000 A range.

Key words： shunt-type DC current transformer dual-range analog-to-digital converter (ADC) sampling differential conditioning circuit hysteresis switching

Received: 26 November 2025

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	ZHANG Yuchi
	LI Shaodong
	LU Wei
	ZHAO Senlin
	ZHU Herong

Cite this article:

ZHANG Yuchi,LI Shaodong,LU Wei等. Research on shunt-type DC current transformer signal processing system[J]. Electrical Engineering, 2026, 27(6): 66-71.

URL:

https://dqjs.cesmedia.cn/EN/Y2026/V27/I6/66

[1] 申永鹏, 刘迪, 梁伟华, 等. 三相桥式逆变电路电流检测方法综述[J]. 电工技术学报, 2023, 38(2): 465-484.
[2] 郑涛, 康恒. 基于控保协同的柔性低频输电系统电流差动保护性能提升方案[J]. 电工技术学报, 2025, 40(7): 2162-2177.
[3] 马燕峰, 李金媛, 王子建, 等. 基于量测数据的新能源电力系统区域等效惯量评估方法[J]. 电工技术学报, 2024, 39(17): 5406-5421.
[4] 耿祥瑞, 刘舒杨, 柴斌, 等. 光纤电流互感器超辐射发光二极管光源衰减故障分析[J]. 电气技术, 2024, 25(12): 21-27.
[5] 陈宇飞, 金海望, 李金卜, 等. 一起直流光电流互感器故障原因分析[J]. 电气技术, 2025, 26(4): 80-84.
[6] 王鹏玮, 徐丙垠, 陈恒, 等. 零序电流互感器误差对小电流高祖接地保护影响及选型[J]. 电力系统自动化, 2023, 47(12): 154-162.
[7] 罗苏南, 曹冬明, 须雷, 等. 500kV直流电子式电流互感器及其应用[J]. 电工电气, 2013(9): 41-44.
[8] 汪赛. 直流电流互感器动态性能测试与分析[J]. 中国高新科技, 2025(2): 46-48.
[9] Takahashi M, Sasaki K, Hirata Y, et al.Field test of DC optical current transformer for HVDC Link[C]// IEEE PES General Meeting, Minneapolis, MN, 2010: 1-6.
[10] Kester W.The data conversion handbook[M]. London: George Newnes Limited, 2005.
[11] 胡睿, 孙亚飞, 潘美珍. 一种宇航电机相电流双量程采样电路及快速遥测报警方法: CN202211157772.7[P].2023-01-10.
[12] 麻刚, 张海江, 王柏林. 一种基于双速率双量程采样的电能质量监测装置: CN201210247188.0[P].2014- 06-18.
[13] 吴婧, 姚良忠, 王志冰, 等. 直流电网MMC拓扑及其直流故障电流阻断方法研究[J]. 中国电机工程学报, 2015, 35(11): 2681-2694.
[14] 夏向阳. 柔性直流输电系统控制保护技术[M]. 北京:中国电力出版社, 2021.