| Because the XLPE cable has excellent insulating properties, good electrical performance, installation simple process and other advantages, is now a large-scale application to the city power grid construction and transformation process. Therefore, the XLPE cable insulation condition is directly related to the area of the reliable operation of the power grid and the daily life of the residents. Real insulation status of preventive test can not reflect the conventional cables, and will spend a lot of manpower, material resources, and more likely to accelerate aging cable. And the application of XLPE on-line partial discharge monitoring system for the running state of each cable to cable real-time monitoring of substation, judge the cable insulation is abnormal, the abnormal diagnosis, effectively avoid maintenance in fault occurs after the passive, in advance of cable fault.The paper analyzes the causes of the partial discharge phenomena and basic characteristics, describes in detail the process of partial discharge, partial discharge insulation failure form of cable induction, and briefly describes the status of partial discharge detection technology development at home and abroad.This paper introduces the hardware structure and software structure of online monitoring system for partial discharge set of XLPE cable. The whole system through the cable partial discharge signal acquisition system is completed, the transmission to the remote monitoring center for analysis fault diagnosis expert system, the real-time running status of cable, to discover the potential risk of insulation deterioration as soon as possible.Finally, introduced the installation of monitoring system. At present, the system runs in good condition, the function is normal, meet the substation inspection requirements. |
PDF Full Text Request