Voltage generating device and withstanding voltage test device of gas insulation totally-enclosed combination electric appliance

A voltage generating device and voltage generator technology, applied in measurement devices, testing circuits, testing dielectric strength and other directions, can solve the problem of inability to carry out DC superposition operation impulse voltage withstand voltage test, etc., to achieve the effect of improving reliability

Pending Publication Date: 2017-10-20
NORTH CHINA ELECTRICAL POWER RES INST +2
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  • Abstract
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Problems solved by technology

[0005] The embodiment of the present invention provides a voltage generating device to solve the technical problem in the prior art that the GIS cannot carry out the withstand voltage test of the DC superimposed operation impulse voltage

Method used

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  • Voltage generating device and withstanding voltage test device of gas insulation totally-enclosed combination electric appliance
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  • Voltage generating device and withstanding voltage test device of gas insulation totally-enclosed combination electric appliance

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Embodiment Construction

[0020] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the embodiments and the drawings. Here, the exemplary embodiments of the present invention and the description thereof are used to explain the present invention, but not as a limitation to the present invention.

[0021] In the embodiment of the present invention, a voltage generating device is provided, such as figure 1 As shown, the voltage generating device includes: an operating impulse voltage generator 1, a DC voltage generator 2, a DC blocking capacitor 3, an AC blocking resistor 5, and a filter capacitor 7, wherein,

[0022] The operating impulse voltage generator 1 is used to output an operating impulse voltage; specifically, for example, the operating impulse voltage generator 1 can generate a standard 25 / 250 μs operating impulse voltage wave.

[0023] The first terminal n of the blo...

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Abstract

The invention provides a voltage generating device and a withstanding voltage test device of a gas insulation totally-enclosed combination electric appliance. The voltage generating device comprises an operation impact voltage generator, a DC voltage generator, a blocking DC capacitor, a blocking AC resistor and a filtering capacitor, wherein a first end of the blocking DC capacitor is connected with a first output end of the operation impact voltage generator, a first end of the filtering capacitor is connected with a first output end of the DC voltage generator and a first end of the blocking AC resistor, a second end of the blocking AC resistor is connected with a second end of the blocking DC capacitor to form a voltage output end, and a second output end of the DC voltage generator and a second output end of the operation impact voltage generator are in connection with ground potential. The voltage generating device is advantaged in that superposition of a DC voltage and an operation impact voltage is realized, the voltage generating device can be applied to withstanding voltage tests of a GIS, and the voltage generating device has important meaning for rule study on influence of developing a DC electric field on insulation characteristics of an internal solid insulator of GIS equipment.

Description

Technical field [0001] The invention relates to the technical field of electrical equipment, in particular to a voltage generating device and a withstand voltage test device of a gas-insulated fully enclosed combined electrical appliance. Background technique [0002] Gas insulated switchgear (GIS for short) will have residual DC voltage on the GIS bus during the breaking process. CIGRE conducted a lot of research in the 1970s and 1980s. Since the 1100kV GIS equipment of the Langfang UHV substation officially entered the system commissioning on June 15, 2016, when the no-load bus was charged with a GIS circuit breaker, there were 6 times and 7 locations of the internal insulation discharge fault of the 1000kV bus. Among them, 2 times occurred at the bus conductor supporting insulator, 4 times occurred at the basin insulator, and the discharge types were all creeping discharge. Through field tests, the residual DC voltage of the busbar during the breaking process of the GIS circu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/14G01R31/12
CPCG01R31/1254G01R31/14
Inventor 沙彦超徐党国李大卫蔡巍龙凯华郑一博李志刚崔贺平吴刚邓春孙云生杨大伟李帆
Owner NORTH CHINA ELECTRICAL POWER RES INST
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