Can type capacitor voltage mutual inductor

A voltage transformer and capacitive technology, applied in the direction of inductors, voltage dividers, transformers, etc., can solve the problems of uneven distribution of transient overvoltage, ferromagnetic resonance of power grid, lack of insulation performance, etc., and achieve good transient characteristics , The effect of small temperature influence and large insulation margin

Active Publication Date: 2007-02-14
WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST
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Problems solved by technology

[0006] The purpose of the present invention is to improve the defects of the prior art and provide a tank-type CVT with a new design concept, mainly to solve the problem of transient overvoltage distribution of primary windings of voltage transformers used in UHV, EHV and high-voltage GIS. The lack of insulation performance caused by both, the danger of ferromagnetic resonance with the power grid, and difficult manufacturing processes

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  • Can type capacitor voltage mutual inductor
  • Can type capacitor voltage mutual inductor
  • Can type capacitor voltage mutual inductor

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Embodiment

[0023] The present invention is suitable for UHV and UHV GIS, such as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 As shown, the basic structure of the present invention is composed of a sealed tank body 1, a high-voltage electrode 2, a medium-voltage electrode 3, an outlet sleeve 4 and an electromagnetic unit 5, and the high-voltage electrode 2 and the medium-voltage electrode 3 are all in the sealed tank body. 1, using SF 6 Gas-insulated tank structure, electromagnetic unit 5 is externally mounted; sealed tank body 1, high-voltage electrode 2 and medium-voltage electrode 3 are all coaxial cylindrical structures, and high-voltage electrode 2 is in the innermost layer, and medium-voltage electrode 3 is in the sealed tank body 1 and high-voltage electrode 2; high-voltage arm capacitance C is formed between high-voltage electrode 2 and medium-voltage electrode 3 1 , the medium-voltage arm capacitance C is formed between the medium-voltage electrode 3 and the seal...

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Abstract

A voltage mutual inductor of tank capacity type consists of sealed tank body, high voltage electrode, medium voltage electrode, sleeve of outgoing wire and electromagnetic unit. It is featured as forming high voltage arm capacity C1 by cylindrical surfaces between high voltage and medium voltage electrodes, forming medium voltage arm capacity C2 by cylindrical surfaces between medium voltage electrode and sealed tank body, using two said arm capacities C1 and C2 to form capacity voltage divider.

Description

technical field [0001] The invention belongs to the field of high-voltage electrical appliances for power transmission and transformation equipment, and relates to a high-voltage capacitive voltage transformer, in particular to a tank-type capacitor-type voltage transformer (referred to as tank-type CVT), which is suitable for gas-insulated substations of 1000kV voltage level power grids (hereinafter referred to as GIS), the electric energy metering, relay protection and power monitoring can also be extended to 750kV, 500kV and lower voltage level grids. Background technique [0002] At present, the voltage transformer widely used in GIS is the electromagnetic voltage transformer (hereinafter referred to as VT). As the voltage level increases, the manufacturing difficulty, process, cost, volume, and weight of VT will increase exponentially, and the insulation properties are also very bad. Poor overvoltage capability. As far as the applicant knows, the only GIS with a volta...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R15/06H01F38/26
CPCH02B13/0356
Inventor 王晓琪栗钢吴春风叶国雄余春雨吴仕普
Owner WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST
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