Method for simulating XLPE insulated cable partial discharge and simulation testing platform
A cross-linked polyethylene, partial discharge technology, applied in the direction of testing dielectric strength, etc., can solve problems such as the inability to provide conclusive data to verify the corresponding relationship, the low effectiveness of the partial discharge charging detection technology, and the inability to give clear criteria. , to achieve a wide range of adaptation, improve the ability to identify partial discharge faults, reduce workload
Active Publication Date: 2014-07-16
STATE GRID CORP OF CHINA +1
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However, due to the existence of various unpredictable interference signals on site, the effectiveness of partial discharge live detection technology is low, and it is more necessary to rely on the experience and knowledge of the inspectors to judge the fault qualitatively, which requires the inspectors to be fully Understand the advantages, disadvantages and effectiveness of XLPE cable partial discharge live detection technology
Usually, the types of defects that may exist in the equipment can only be roughly given based on the test results, and no clear criteria can be given, especially in the research on the relationship between the type and degree of defects and the signal characteristics. Correspondence between
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[0020] like figure 1 As shown, the present invention is a method and a simulation detection platform for simulating partial discharge of XLPE insulated cables.
[0021] The method of simulating the partial discharge of XLPE insulated cables is to accurately simulate five different defect types of XLPE cables, and realize the one-to-one correspondence between defect types and the effectiveness of partial discharge detection technology:
[0022] Firstly, establish the spectral library of XLPE cable partial discharge;
[0023] Secondly, by artificially manufacturing cross-linked polyethylene insulated cable intermediate joints to produce needle point defects 1, cable intermediate joints to produce air gap defects 2, cable insulation layer low potential to produce knife mark defects 3, cable terminal joints to low potential to produce needle point defects 4 and cable 5 different types of typical defects in the production of air gap defects at low potentials of terminal joi...
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The invention provides a method for simulating XLPE insulated cable partial discharge and a simulation testing platform, and belongs to the technical field of power cable charged detection. According to the method, five different defect types of an XLPE cable are accurately simulated, and therefore the defect types correspond to partial discharge detection technology effectiveness in a one-to-one mode; the method comprises the specific steps that an atlas database of XLPE cable partial discharge is built at first; then different types of typical defects of the XLPE insulated cable are manufactured manually; the type and degree of the defects are judged according to the features of output signals of the simulation testing platform, and the defect types are made to correspond to partial discharge detection technology effectiveness in the one-to-one mode. The simulation testing platform can simulate five types of typical defects of the cable, and significantly improve the XLPE cable partial discharge fault recognition capability. The method for simulating XLPE insulated cable partial discharge and the simulation testing platform have the advantages of being easy to operate, capable of improving the XLPE cable partial discharge fault recognition capability, wide in application range, safe and reliable.
Description
technical field [0001] The invention belongs to the technical field of electric cable live detection, and in particular relates to a method for simulating partial discharge of a cross-linked polyethylene insulated cable and a simulation detection platform. Background technique [0002] Cross-linked polyethylene (XLPE) cables play an extremely important role in urban power grids, and their safe operation is crucial to the stability of the entire power system. Partial discharge detection is one of the important methods to evaluate the insulation condition of XLPE cables, the expected service life and ensure the safe and reliable operation of power cables. [0003] In recent years, cable partial discharge live detection technology has been more and more applied in the routine inspection of XLPE cables. However, due to the existence of various unpredictable interference signals on site, the effectiveness of partial discharge live detection technology is low, and it is more nece...
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IPC IPC(8): G01R31/12
Inventor 李学斌隋东硼鲁旭臣康激扬韦德福郭铁胡大伟耿莉娜韩洪刚罗斌
Owner STATE GRID CORP OF CHINA
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