High signal-to-noise ratio pressure wave method model cable space charge test system
Patent Information
- Authority / Receiving Office
- CN Β· China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NANJING NARI GROUP CORP
- Publication Date
- 2017-09-12
Smart Images
Figure 1 
Figure 2 
Figure 3
Abstract
Description
technical field
[0001] The invention belongs to the technical field of model cable space charge testing, in particular to a model cable space charge test system with a high signal-to-noise ratio pressure wave method used for model cable space charge testing. Background technique
[0002] Under high DC electric field, the main problem faced by DC cables is that a certain amount of space charge will accumulate in the insulating medium or on the interface. If the space charge density is high enough, the local electric field may even exceed the breakdown electric field of the insulating medium, resulting in dielectric destruction. Space charge measurement techniques, including pulsed electro-acoustic (PEA) method, pressure wave propagation (PWP) method, etc., have strongly promoted the study of space charge. At present, the cable insulation thickness used for space charge test is 2~6 mm, which is called model cable, and the method usually used for space charge test of model cabl...