Alternating-current ultrahigh voltage main transformer and regulation transformer combined partial discharge testing system and method

A partial discharge and partial discharge detection technology, applied in the direction of testing dielectric strength, etc., can solve the problems of insufficient insulation assessment of voltage regulating and compensation transformers, many test equipment, and heavy workload, so as to achieve scientific and comprehensive insulation assessment and simplified test procedures. , the effect of improving work efficiency

Active Publication Date: 2015-06-17
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0006] 1) Insufficient assessment of voltage regulation and compensation transformer insulation
[0007] 2) It is necessary to remove and restore the connecting wires of t

Method used

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  • Alternating-current ultrahigh voltage main transformer and regulation transformer combined partial discharge testing system and method
  • Alternating-current ultrahigh voltage main transformer and regulation transformer combined partial discharge testing system and method
  • Alternating-current ultrahigh voltage main transformer and regulation transformer combined partial discharge testing system and method

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Embodiment Construction

[0027] The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention.

[0028] See figure 1 , the AC UHV main transformer modulation combined partial discharge test system of the present invention includes a frequency conversion power supply 1, a test transformer 2, a compensation reactor 3, a capacitor voltage divider 4, a partial discharge detection system 5, and a test object voltage regulation compensation transformer 6 and an AC UHV main transformer 7, wherein the output end of variable frequency power supply 1 is connected to the low-voltage side of test transformer 2, the high-voltage side of test transformer 2 is connected to the low-voltage side of voltage regulation and compensation transformer 6, and the high-voltage side of voltage regulation and compensation transformer 6 is connected to the AC characteristic The low-voltage side of the high-voltage main transf...

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Abstract

The invention provides an alternating-current ultrahigh voltage main transformer and regulation transformer combined partial discharge testing system which comprises a variable frequency power source, a testing transformer, a compensation reactor, a capacitive voltage divider, partial discharge detection systems, a regulation compensation transformer and an alternating-current ultrahigh voltage main transformer. The output end of the variable frequency power source is connected with the low voltage side of the testing transformer. The high voltage side of the testing transformer is connected with the low voltage side of the regulation compensation transformer. The high voltage side of the regulation compensation transformer is connected with the low voltage side of the alternating-current ultrahigh voltage main transformer. The compensation reactor and the capacitive voltage divider are connected between the testing transformer and the regulation compensation transformer in parallel. The alternating-current ultrahigh voltage main transformer and the regulation compensation transformer are each provided with one partial discharge detection system. Alternating-current ultrahigh voltage main transformer and regulation transformer on-site partial discharge testing can be completed at a time, so that the testing procedures are greatly simplified; during testing, electrical connecting wires of the alternating-current ultrahigh voltage main transformer and the regulation compensation transformer do not need to be disassembled, on-site workloads are lowered, and the working efficiency is improved.

Description

technical field [0001] The invention relates to a field test method for a power transformer, in particular to an AC UHV main transformer modulation combined partial discharge test system and method. Background technique [0002] The 1000kV AC UHV transmission project is currently the highest voltage AC transmission project in the world. With the succession of Jindongnan-Nanyang-Jingmen UHV AC test demonstration project and expansion project, Anhui East Huainan-Shanghai AC UHV transmission project Putting into operation, AC UHV is showing a trend of vigorous development in my country. [0003] AC UHV transformer is one of the most important and expensive equipment of AC UHV transmission project. In order to ensure the quality of transformer production and installation, and to find hidden dangers in transformer operation, it is necessary to carry out transformer handover and pre-test on site. For AC UHV transformers, the long-duration induction withstand voltage test with par...

Claims

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Application Information

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IPC IPC(8): G01R31/12
Inventor 邓万婷鲁非罗维金雷周凯吴云飞沈煜
Owner STATE GRID CORP OF CHINA
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