Partial discharge test method for 750kv shunt reactor in high altitude area
A technology of partial discharge and reactor, which is applied in the field of partial discharge test of 750kV shunt reactor in high altitude area, can solve the problems that 500kV test circuit cannot meet higher voltage level test, high test voltage level, large equipment capacity, etc., and achieve reduction Small interference, guaranteed experimental data, avoiding the effect of coupling interference
Active Publication Date: 2020-02-07
STATE GRID CORP OF CHINA +3
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Problems solved by technology
Since the test site is located in a substation, the test voltage level is high, the equipment capacity is large, and the background interference is strong, the traditional 500kV test circuit cannot meet the requirements of higher voltage level tests
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[0029] In order to better understand the present invention, the content of the present invention is further illustrated below in conjunction with the examples, but the content of the present invention is not limited to the following examples. Those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms are also within the scope of the claims listed in this application.
[0030] Such as figure 1 As shown, the partial discharge test method for a 750kV shunt reactor in a high-altitude area provided by the embodiment of the present invention adopts a partial discharge test device for a 750kV shunt reactor in a high-altitude area. Capacitance (C 0 ), parallel compensation capacitor (C 1 、C 2 ), the reactor under test (L 0 ), choke reactor (L P ), and a partial discharge tester (PD); the parallel compensation capacitor can also be used as a capacitor voltage divider. Variable frequency power supply, isolation transform...
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The invention relates to a high-altitude area 750kV shunt reactor partial discharge test method. The method uses a high-altitude area 750kV shunt reactor partial discharge test device that comprises a variable-frequency power supply, an isolation transformer T, a series resonant capacitor C0, shunt compensation capacitors C1 and C2, a tested reactor L0, a resistance wave reactor LP and a partial discharge measuring circuit PD. A test uses a series resonance boosting approach. By adjusting the voltage frequency of the variable-frequency power supply, the tested reactor L0 and a capacitor in the loop resonate so that required test voltage can be obtained from the tested reactor. It has important significance for the safe use of the 750kV shunt reactor and the stable operation of an EHV power grid to detect the insulation performance of the 750kV shunt reactor by partial discharge tests.
Description
technical field [0001] The invention relates to the technical field of on-site partial discharge testing, in particular to a partial discharge testing method for 750kV shunt reactors in high-altitude areas. Background technique [0002] The Northwest 750kV ultra-high voltage power transmission and transformation project is the power transmission and transformation project with the highest operating voltage level in Northwest my country. The 750kV power grid backbone grid formed is of great significance to the optimal allocation of resources in my country. As a device for providing reactive power compensation, 750kV shunt reactor plays a very important role in power grid operation. And with the development and construction of my country's ultra-high voltage power grid and UHV power grid, this effect will become more and more obvious. But at the same time, problems in the operation of 750kV shunt reactors are also increasing day by day. In addition to problems such as large v...
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IPC IPC(8): G01R31/12
CPCG01R31/1227
Inventor 王生杰康钧李江涛于鑫龙沈洁何家欣郑敏君王生富王理丽林万德麻守孝刘敬之马骥马志青
Owner STATE GRID CORP OF CHINA