Research on the On-Line Monitoring System for Partial Discharge of Cable Joint

2013 ◽  
Vol 373-375 ◽  
pp. 986-991
Author(s):  
Yan Qing Li ◽  
Zi Hang Jia ◽  
Liang Zhao ◽  
Jian Feng Liang
Keyword(s):  
Monitoring System ◽  
Discharge Current ◽  
Electromagnetic Induction ◽  
Partial Discharge ◽  
Transfer Characteristic ◽  
Noise Signal ◽  
Current Transformer ◽  
Transformer Substation ◽  
On Line ◽  
Monitoring Platform

This paper introduces an on-line monitoring system for partial discharge of 10kV cable joint based on LabVIEW. It calculates transfer characteristic of wideband current transformer for monitoring partial discharge current after analyzing the mechanism of production of partial discharge. The proposed current transformer can restrain the noise signal efficiently in electromagnetic induction part. Since the on-line monitoring system was installed in transformer substation, the LabVIEW monitoring platform can keep a lookout over partial discharge current of cable joint constantly. It can monitor the cable joint accurately.

Development of On-Line Monitoring System and Aging Characteristics Research of Switchgear

2013 ◽  
Vol 330 ◽  
pp. 364-367
Author(s):  
Shu Xin Liu ◽  
Yun Dong Cao ◽  
Chun Guang Hou ◽  
Yang Liu ◽  
Xiao Ming Liu
Keyword(s):  
Epoxy Resin ◽  
Monitoring System ◽  
Estimation Method ◽  
Current Transformer ◽  
Insulation Material ◽  
Electrical Characteristics ◽  
Infrared Transmission ◽  
Lifetime Estimation ◽  
Monitoring Method ◽  
On Line

For improving reliable operation of switchgear in power system, an approach for on-line monitoring the insulation characteristic and bus-bar temperature rising of the switchgear is proposed in this paper. Through comparing several existing temperature measurement methods for monitoring temperature rising elevation at bus-bas, a new design of temperature monitoring method is proposed. It adopts quick-magnetic saturated current transformer, temperature sensor and infrared transmission to solve the problem of high voltage isolation. The epoxy resin insulation material which is commonly used in switchgear its aging mechanism data is not complete, seriously restrict on-line monitoring for switchgear, so thousands hours of aging experiment is done on switchgear, systematic study various electrical characteristics variation law on the gradual aging process of epoxy resin insulation materials. Therefore, study on the aging characteristics of switchgearinsulation and its lifetime estimation method is the key technology to understand agingmechanism better, search for new fault diagnostic method and the way to extend theuseful lifetime of switchgear. At last, the system runs in real system and the result shows the on-line monitoring system is stable and reliable which can be provide reference for on-line monitoring system design of switchgear.

scholarly journals Development of On-line Partial Discharge Monitoring System in Gas Insulated Substation

1997 ◽  
Vol 117 (12) ◽  
pp. 1575-1583 ◽  
Author(s):  
T. Sakakibara ◽  
H. Murase ◽  
E. Haginomori ◽  
S. Wakabayashi ◽  
K. Emoto ◽  
...  
Keyword(s):  
Monitoring System ◽  
Partial Discharge ◽  
On Line ◽  
Discharge Monitoring ◽  
Gas Insulated Substation

The Design of Multiplexer for On-Line Partial Discharge Monitoring System

2013 ◽  
Vol 753-755 ◽  
pp. 2227-2231
Author(s):  
Yuan Yang ◽  
Jian Gang Bi ◽  
Yan Peng Gong ◽  
Ning Yang
Keyword(s):  
Monitoring System ◽  
Virtual Instrument ◽  
Partial Discharge ◽  
Simultaneous Detection ◽  
Field Application ◽  
Measuring System ◽  
Signal Acquisition ◽  
Time Sharing ◽  
On Line ◽  
Discharge Monitoring

Partial discharge is an important content of insulation monitoring of high-voltage power equipment, which generates high-frequency signals and real-time monitoring data is of great quantity. Simultaneous detection of multi-channel signals faces technical difficulty, and of high cost and poor reliability, it can also cause unnecessary waste of resources. In accordance with the characteristics and needs of partial discharge monitoring system at substation site, the concept of time-division multiplexing technology in communication technology is adopted into the multi-channel signal acquisition and measuring system, which using multiplexer MAX4638 and virtual instrument. The designed multiplexer for the partial discharge monitoring overcame several shortcomings, such as hardware resources consumption, poor reliability and high cost in multi-channel synchronous acquisition. By using of polling method to achieve one detection device for the time-sharing acquisition and processing of multiple devices or signals, this device can greatly enhance the on-line monitoring system economically and practically in the field application.

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