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A detection device and method for measuring partial discharge under temperature gradient

A partial discharge and temperature gradient technology, which is applied in the direction of measuring devices, measuring electricity, and measuring electrical variables, etc., can solve problems such as cable faults and the influence of cable insulation status, and achieve the effects of convenient operation, avoiding surface slip and flash, and high safety factor

Active Publication Date: 2019-11-08
XI AN JIAOTONG UNIV +1
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Problems solved by technology

[0002] With the development of power technology and the expansion of urban construction scale, compared with overhead lines, power cable lines have many advantages. However, due to the continuous increase of cable lines, there are more and more cable faults. The most important fault is That is, there are some typical defects in the main insulation of the cable, which will have a great impact on the insulation state of the cable

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  • A detection device and method for measuring partial discharge under temperature gradient
  • A detection device and method for measuring partial discharge under temperature gradient
  • A detection device and method for measuring partial discharge under temperature gradient

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Embodiment Construction

[0029] After long-term operation of high-voltage power equipment, the main insulation system will gradually age under the influence of long-term high-voltage electric heat and mechanical external force, resulting in deterioration of the insulation system. By performing partial discharge measurements on insulation samples with typical defects in the laboratory under different temperature gradients, and simulating the defects in the main insulation system of power equipment under operating conditions, the insulation status of real power equipment can be evaluated. At the same time, it can also provide a certain theoretical reference for the insulation structure design of power equipment.

[0030] see figure 1 and figure 2 , the present invention provides a detection device for measuring partial discharge under a temperature gradient, comprising an oil tank filled with silicone oil 10, a metal electrode, a temperature-controlled circulator, a sample 9, a high-voltage power supp...

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Abstract

The invention discloses a detection device for measuring local discharging under the temperature gradient and the method. The detection device comprises an oil tank containing silicon oil, a temperature control unit, a sample and a local discharging measurement unit. The temperature control unit comprises a temperature control circulator and a metal electrode. The sample is arranged in the metal electrode. The metal electrode is of a hollow structure and arranged in the oil tank. The metal electrode is connected with the temperature control circulator and used for temperature control. The local discharging measurement unit is connected with the metal electrode and used for detection. According to the invention, experiments in different voltage types can be performed; local discharging behaviors of electric power device main insulation layers in different voltage types under the operation state are simulated; and the local discharging detection device is simple in structure, convenient to operate, high in safe coefficients, and capable of effectively measuring experiment results.

Description

technical field [0001] The invention belongs to the field of partial discharge measurement, and relates to a detection device and method for measuring partial discharge under a temperature gradient. Background technique [0002] With the development of power technology and the expansion of urban construction scale, compared with overhead lines, power cable lines have many advantages. However, due to the continuous increase of cable lines, there are more and more cable faults. The most important fault is That is, there are some typical defects in the main insulation of the cable, which will have a great impact on the insulation state of the cable. For many years, partial discharge measurement has been considered as one of the most effective methods for evaluating the insulation state of cables and accessories. During the operation of high-voltage DC cables, the insulation layer forms a temperature gradient from the inside to the outside due to the heating of the conductor, w...

Claims

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Application Information

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IPC IPC(8): G01R31/12
CPCG01R31/1272
Inventor 徐阳张宇航何爽傅明利侯帅刘通惠宝军
Owner XI AN JIAOTONG UNIV
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