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《High Voltage Engineering》 2003-07
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Study on the Grounding in Superposing DC Current Method for the On-line Monitoring of XLPE Cable

Wang Yi et al  
If the XLPE cable on-line monitoring system, which is based on the method of superposing a low DC voltage on the neutral point of PT ,is used in 6-35 kV power system, the way of grounding of potential transformers and the shielding layer of cable must be changed. Depending on simulations with the ATP-EMTP and some correlative analysis, the paper analyzes the possible effects on power system caused by changes of the grounding way when there is a fault caused by the over saturated windings of a potential transformer, and gives corresponding methods to solve the problems.
【CateGory Index】: TM862
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