Accelerated aging test device for arrester valve plate based on direct current-coupled impact power supply

A DC-Coupled, Accelerated Aging Technology

Active Publication Date: 2019-02-01
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The unavoidable voltage harmonics, lightning, and operating shock waves in the DC system will produce instantaneous, high-energy-density electrothermal stresses on the zinc oxide arrester and its resistors, causing aging and even rapid thermal collapse of the arrester valve. Similar accidents occur in practice. Happens frequently during operation

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  • Accelerated aging test device for arrester valve plate based on direct current-coupled impact power supply
  • Accelerated aging test device for arrester valve plate based on direct current-coupled impact power supply
  • Accelerated aging test device for arrester valve plate based on direct current-coupled impact power supply

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] see figure 1 , the lightning arrester valve plate accelerated aging test device based on DC-coupled impulse power supply provided by the present invention includes a high-low temperature constant temperature box 1, a DC voltage generator 2, an impulse current generator 3, an isolation capacitor 5, a current-limiting inductor 4 and a signal monitoring device , the signal monitoring device is used to collect and detect voltage, current and temperature signals, including an industrial computer 6, a resistor voltage divider 7, a capacitor voltage divider 8, a first voltage measurement module 9, a second voltage measurement module 15, a current A measurement module 10 , a temperature measurement module 11 and an acquisition card 12 .

[0024] The high and low temperature incubator 1 is provided with a sample valve plate 14 , a current measurement module 10 and a tem...

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Abstract

The invention relates to an accelerated aging test device for an arrester valve plate based on a direct current-coupled impact power supply, which comprises a direct current voltage generator, an impact current generator and a signal monitoring device. The impact current generator and the direct current voltage generator are connected with the signal monitoring device; the output terminal of the direct current voltage generator is divided into two paths, one of which is connected with one end of a current-limiting inductor, and the other of which is connected with one end of a resistor divider; the other end of the current-limiting inductor is divided into two paths, one of which is connected with the test valve plate, and the other of which is connected with one end of a isolating capacitor; the other end of the isolating capacitor is divided into two paths, one of which is connected with the impact current generator, and the other of which is connected with a capacitor divider. The accelerated aging test device adopts the power supply of coupling the direct current voltage generator and the impact current generator in parallel as excitation for accelerated aging of the arrester valve plate, so that the test condition of a test piece is closer to the actual operating condition; the accelerated aging test device can be used for researching the V-A characteristic, the aging characteristic and the direct current impact coupling operating characteristic of the direct current arrester valve plate under the effect of the direct current and the impact high voltage.

Description

technical field [0001] The invention generally relates to the field of high-voltage test devices, in particular to an accelerated aging test device for arrester valve plates based on a DC-coupled impulse power supply. Background technique [0002] my country's energy production areas are gradually moving westward and northward, and the distance between them and energy consumption centers is constantly expanding. UHVDC transmission technology has obvious advantages in long-distance, large-capacity power transmission and its stability. The increase in voltage level puts forward higher requirements on the insulation performance of key power equipment such as UHV DC arresters, converter valves, and smoothing reactors. [0003] The DC arrester works under the DC voltage stress, and at the same time, the leakage current will cause the temperature of the valve plate to rise, and it is in a state of thermal aging. The unavoidable voltage harmonics, lightning, and operating shock w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
CPCG01R31/003
Inventor 邓军波朱晓光刘羿辰余芳郭洁李江涛
Owner XI AN JIAOTONG UNIV
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