UHV (Ultra High Voltage) transformer field variable frequency partial discharge test device

A partial discharge and test device technology, which is applied in the direction of testing dielectric strength, etc., can solve the problems of reducing the 1000kV AC UHV transformer, the weight of the single compensating reactor, and the large demand for power supply, so as to achieve strong product adaptability and output Wide frequency range, small size effect
CN103499779AInactive Publication Date: 2014-01-08STATE GRID CORP OF CHINA +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
STATE GRID CORP OF CHINA
Publication Date
2014-01-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention introduces a UHV (Ultra High Voltage) transformer field variable frequency partial discharge test device. A No.1 frequency conversion cabinet (2) and a No.2 frequency conversion cabinet (3) are connected in parallel between a control cabinet (1) and an exciting transformer (4) of the UHV transformer field variable frequency partial discharge test device; the high voltage output end of the exciting transformer (4) is connected in parallel with a capacitive voltage divider (5), a compensation reactor (6) and a 1,000kV AC (Alternate Current) UHV transformer (7); and the 1,000kV AC UHV transformer (7) is connected in parallel with a partial discharge tester (8) by end screens of high voltage, intermediate voltage and low voltage sleeves of the 1,000kV AC UHV transformer (7). The device has the advantages that 1, adaptability is strong; 2, the device has a small volume and a light weight and is convenient to transport and assemble; 3, reliability is high and the voltage and the frequency can be continuously regulated; 4, direct contact between people and live equipment is avoided and safety is high; and 5, the device has a wide output frequency range and also can be used as a withstand voltage test variable frequency power supply of equipment such as a UHV GIS (Gas Insulated Switchgear), a mutual inductor and the like.
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Description

technical field

[0001] The invention belongs to the technical field of electrical engineering, and relates to a field frequency conversion partial discharge test device for an ultra-high voltage transformer. The device is suitable for field frequency conversion partial discharge test of 1000kV AC UHV transformer. Background technique

[0002] In recent years, the State Grid Corporation of China has vigorously developed UHV AC power transmission and transformation projects. The 1000kV AC UHV transformer is one of the main equipment of the project, and the partial discharge test is one of the important routine tests on the equipment site. This test item can Detect the insulation status of UHV transformers, including 1000kV AC UHV transformers, after long-distance transportation and on-site installation.

[0003] Since the UHV transformer, especially the 1000kV AC UHV transformer, is a split structure with complex structure, high voltage level and large capacity, there are man...

Claims

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