传感器并联型局部放电监测与定位方法

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摘要局部放电监测作为绝缘诊断的重要手段,因其能在早期及时有效地发现电气设备的绝缘缺陷,正为电力部门所推广。然而目前变电站局部放电在线监测都是针对单个设备进行的,要对变电站多设备实施监测,需要安装多个监测装置,存在成本高、系统维护工作量大等问题。本文提出了一种基于传感器并联结构的低成本变电站多设备局部放电监测与初定位方法。该方法通过在一环状信号总线上并联多个安装在不同设备的局部放电传感器,达到仅用一套采集系统监控多个设备的目的,同时利用各个传感器所检测的局部放电脉冲信号到达信号总线两端的时差固定且各自不同,实现局部放电源的初定位。在阐述该新型局部放电监测与初定位原理基础上,本文还对实现该原理的监测系统结构、定位算法进行了初步研究,并进行了实验验证。

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	高鹏路
	胡岳
	刘斌
	曹灵钰
	江秀臣
	盛戈皞

关键词 ：局部放电, 传感器并联, 检波信号, 到达时间差, 定位

Abstract：Partial discharge (PD) monitoring is accepted as the most effective means for insulation diagnosis of high voltage power devices, since it can detect PD defects in early time. However, the methods for PD monitoring of substation equipment are mainly oriented to single device, which require to process on every equipment, cause to high cost, and huge maintenance workload. This paper proposed a PD monitoring system that utilizes multiple sensors connected in parallel to a single cable loop to monitoring PD signals originated by devices in substation. The PD signals are detected by the sensors and transmitted around the cable loop in both directions. A characteristic time delay exists between the measured signals on the two channels for all signals entering the cable from sensor, which is used for PD locating. This paper also focused on the structure of the proposed system, the locating algorithm and proved the feasibility of the system by experiment.

Key words： Partial discharge (PD) multiple sensors in parallel detection signal time difference of arrival(TDOA) locating algorithm

收稿日期: 2012-09-20 出版日期: 2014-06-18

PACS:

TM83

作者简介: 作者简介 :高鹏路男,1989年生,硕士研究生,研究方向为电力设备绝缘在线监测及故障诊断。胡岳男,1978年生,博士,助理研究员,研究方向为局部放电检测及局放系统性能校准, 声表面波传感技术,微能源系统。

引用本文:

高鹏路, 胡岳, 刘斌, 曹灵钰, 江秀臣, 盛戈皞. 传感器并联型局部放电监测与定位方法[J]. 电工技术学报, 2014, 29(2): 226-230. Gao Penglu, Hu Yue, Liu Bin, Cao Lingyu, Jiang Xiuchen, Sheng Gehao. Partial Discharge Monitoring and Locating in Substation <br/>Using Multiple Sensors in Parallel. Transactions of China Electrotechnical Society, 2014, 29(2): 226-230.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2014/V29/I2/226

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