Lightning arrester direct current test system

A DC test and arrester technology, applied in the field of electric power applications, can solve the problems of unfavorable standardized test sites, low safety, and aggravated discharge conditions, and achieve the effects of avoiding floating potential discharge, reducing floating potential, and high safety.

Active Publication Date: 2013-09-11
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0002] At present, electric power workers often encounter the following problems when conducting preventive tests on surge arresters (for example, 220kV zinc oxide arresters) installed on power transmission equipment: zinc oxide arresters installed on lines or zinc oxide arresters installed at transformer outlets Due to limited conditions, especially the 220kV zinc oxide arrester installed on the line does not have the grounding opening condition after the primary lead is grounded. As a result, when testing such equipment, the lower section of the arrester can be tested normally, while the upper section can only be tested. It can be measured by the traditional high-voltage meter reading method. In this traditional measurement method, while the upper section adopts the high-voltage meter reading method, an ammeter needs to be connected to the bottom of the lower section. Since the reading of the high-voltage meter reflects the total current, when needed When the DC reference voltage of the previous section is known, the ammeter reading of the next section mus

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Embodiment Construction

[0025] Hereinafter, the present invention will be described in detail with reference to the drawings and in conjunction with the embodiments. It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other if there is no conflict.

[0026] figure 1 It is a schematic diagram of the internal circuit of the arrester when the traditional test method is adopted according to the related technology, please refer to figure 1 When the traditional test method is adopted, when the test voltage applied to the arrester (for example, 220kV zinc oxide arrester) is less than or equal to the initial operating voltage, the upper and lower sections can be regarded as both composed of pure capacitors; When the test voltage is increased to be greater than the initial operating voltage, the upper and lower sections can be regarded as lossy capacitors, and the base can be regarded as a pure capacitor. Under normal circumstances, the inside ...

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Abstract

The invention discloses a lightning arrester direct current test system. The lightning arrester direct current test system mainly comprises a lightning arrester and a lightning arrester direct current test device, wherein the lightning arrester direct current test device comprises a current test device, a circuit test interface device and a circuit protection device. The lightning arrester direct current test device further comprises a capacitor set. By means of the lightning arrester direct current test system, suspension potential discharge between a lower segment bottom flange of the lightning arrester and the ground can be avoided.

Description

Technical field [0001] The invention relates to the field of electric power applications, and in particular to a DC test system for lightning arresters. Background technique [0002] At present, electric power workers often encounter the following problems when conducting preventive tests on lightning arresters (for example, 220kV zinc oxide arresters) installed on power transmission equipment: zinc oxide arresters installed on the line or installed at the outlet of the transformer Due to the limitation of conditions, especially the 220kV zinc oxide arrester installed on the line does not have the grounding opening condition after the lead is grounded once, which leads to the normal test of the lower section of the arrester during the test of this type of equipment, while the test of the previous section only The traditional high-voltage meter reading method can be used to measure. In this traditional measurement method, while the high-voltage meter reading method is used in the ...

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Application Information

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IPC IPC(8): G01R31/00G01R19/00
Inventor 王凤杰崔胜建王良杨佳奇贾怀忠孙志杰武光宇
Owner STATE GRID CORP OF CHINA
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