MEASUREMENT OF WEAK DC SIGNAL IN ON-LINE MONITORING SYSTEM OF XLPE POWER CABLES

ZHAO Yong1; CHENG Yong-hong2; GUO Liang21.Xi'an Thermal Power Research Institute Co Ltd

doi:10.19666/j.rlfd.2008.09.023

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MEASUREMENT OF WEAK DC SIGNAL IN ON-LINE MONITORING SYSTEM OF XLPE POWER CABLES

更新时间：2025-09-28

- MEASUREMENT OF WEAK DC SIGNAL IN ON-LINE MONITORING SYSTEM OF XLPE POWER CABLES
- Thermal Power Generation Issue 9, Pages: 79-82(2008)
- 作者机构：
  
  1. 西安热工研究院有限公司
  2. 西安交通大学
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.2008.09.023
  CLC： TM764
- Published：2008
- 稿件说明：
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ZHAO Yong1, CHENG Yong-hong2, GUO Liang21.Xi'an Thermal Power Research Institute Co Ltd. MEASUREMENT OF WEAK DC SIGNAL IN ON-LINE MONITORING SYSTEM OF XLPE POWER CABLES[J]. Thermal power generation, 2008, (9): 79-82.
DOI：

ZHAO Yong1, CHENG Yong-hong2, GUO Liang21.Xi'an Thermal Power Research Institute Co Ltd. MEASUREMENT OF WEAK DC SIGNAL IN ON-LINE MONITORING SYSTEM OF XLPE POWER CABLES[J]. Thermal power generation, 2008, (9): 79-82. DOI： 10.19666/j.rlfd.2008.09.023.

摘要

研究XLPE电缆在线监测中微弱直流信号测量电路的关键模块和数字滤波设计。对测量电路的性能试验结果表明

该测量电路的设计方案可以较精确地测量约为1nA的直流信号

平均误差为2.25%

能够满足监测系统对信号的精度要求。

Abstract

The design of key modules and digital filters for measuring circuit of weak DC signals in on-line monitoring system of XLDE power cables has been studied

the results of performance test for the said measuring circuit show that the designed scheme of the measuring circuit can more accurately measure the DC signals of about 1 nA

the average error being 2.25%

satisfying the requirements of monitoring system for signal precission.

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