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High voltage direct current withstand voltage test discharge method

A withstand voltage test, high voltage DC technology, applied in the direction of testing dielectric strength, etc., can solve the problems of poor operation safety, unstable discharge, long discharge time, etc., to achieve the effect of safe and reliable operation, shorten discharge time, and improve test efficiency

Active Publication Date: 2019-04-26
STATE GRID FUJIAN ELECTRIC POWER CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Analysis: Self-discharge to 70% of the test voltage through the voltage divider, the discharge time is long, the wet branches or wood are unstable during discharge, and the operation safety is poor

Method used

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0033] Such as figure 1 As shown, the present embodiment provides a method for high-voltage DC withstand voltage test discharge, providing a discharge device and a tested electrical equipment, the discharge device includes a discharge module, a regulating device 6, a sliding trolley 13 and a place for placing all The sliding guide rail 14 of the sliding trolley and the insulating operating rod 15 used to push the sliding trolley forward; the detection control module 8 is provided with a discharge current detection module 7, and the discharge current detection module 7 communicates with the adjustment via a wire The device 6 is connected to monitor the discharge current; the sliding trolley is equipped with an insulating telescopic rod 11 capable of vertical expansion and contraction; the discharge module is composed of a number of discharge resistors co...

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Abstract

The invention relates to a high voltage direct current withstand voltage test discharge method. The method comprises the steps that a discharge device and tested electrical equipment are provided, firstly parameters of a direct current withstand voltage test of the tested electrical equipment are collected, and discharge time t when the test voltage of the tested electrical equipment is lowered to1000V is calculated; then the discharge device is assembled, adjusted and subjected to simulation operation, a sliding trolley is controlled by an operating lever to move, so that a discharge guide rod is in contact with the tested electrical equipment, and discharge is performed through a discharge resistor; finally discharge current is monitored through a discharge current detection module, thedischarge current reaches a preset value by adjusting the discharge resistance values, and when the discharge current is 0, discharge of the tested electrical equipment is ended. The high voltage direct current withstand voltage test discharge method can perform fast assembly and adjustment according to on-site needs, the operation is safe and reliable, and the test efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of electrical engineering tests, in particular to a discharge method for high-voltage DC voltage withstand tests. Background technique [0002] In the electrical installation project, after the DC cable is installed completely, in order to ensure the safe operation of the system, a handover test must be carried out before putting into operation. The effective method of voltage capability is of great significance to ensure the safe operation of equipment. [0003] DC withstand voltage test means: apply a DC voltage higher than the overvoltage value that may be encountered during operation to the tested product, and continue for a period of time to check the insulation level of the equipment. The DC withstand voltage test can better simulate the voltage withstand of the tested product in actual operation, and can effectively find some local defects of the tested product; and because of its relatively simple w...

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Application Information

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IPC IPC(8): G01R31/12
CPCG01R31/12
Inventor 陈章山郭洪英许荔娟丁苏张一航郑燕敏
Owner STATE GRID FUJIAN ELECTRIC POWER CO LTD