Theoretical Analysis and Simulation of a Novel Method on Insulation On-line Monitoring of Cross-linked XLPE Electrical Cable at 220kV
In this paper the conformation of the cross-linked XLPE electrical cable and the attended mode of it is mainly presented.As vectors of the same frequency can be calculated,the current got from the sensors are inverted to direct-viewing leakage current of each segment through vector calculation.So the insulation condition of each segment can be known directly.This paper introduces a standard unit of cross-linked XLPE electrical cable and its equivalent circuit. According to the simulated result of the vectors,the vectors of sensors current and the equivalent circuit,the vectors of the leakage current of every segment can be gained.It is the basic of the theory analysis.Applying the method of grounding current to on-line monitor the insulation conditions of cross-linked XLPE electrical cable.The simulation result from MATLAB program confirms the practicability and the probability of this method, accounting the current of insulation and impedance of it.It is proofed that it is an effective and novel way of the on-line monitoring of the insulation conditions on XLPE electrical cable.
crossing-XLPE cable insulation monitoring online grounding-current vector calculation synchronous sampling equivalent circuit diagram
Zhongjie LIU Genzhi GUAN Chunlei Shi
Department of Electrical Engineering,Wuhan University,Wuhan,Hubei Province,China
国际会议
2007 IEEE International Conference on Automation and Lofistics
山东济南
英文
2007-08-18（万方平台首次上网日期，不代表论文的发表时间）