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A cvt dry type electromagnetic unit

An electromagnetic unit and dry-type technology, applied in the field of CVT, can solve the problems of inconvenient installation and transportation, high noise of eddy current impedance, complicated manufacturing process, etc., and achieve the effect of reducing partial discharge level, short magnetic circuit length and small volume

Inactive Publication Date: 2018-04-10
HUNAN HUAXIONG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the oil-immersed electromagnetic unit has defects such as strong oil permeability, difficult sealing, flammability and explosion, environmental pollution, complicated manufacturing process, inconvenient testing and debugging, installation and transportation, etc.
In addition, the core of the intermediate transformer in the traditional electromagnetic unit adopts the insert type iron core, which reduces the magnetic permeability, produces eddy current impedance with large noise, and high no-load loss
Although CVT can fully meet the requirements for level 0.5, due to the continuous innovation and development of the power industry, the measurement accuracy requirements for power equipment are getting higher and higher, and it is more difficult for level 0.2 products

Method used

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  • A cvt dry type electromagnetic unit
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Embodiment Construction

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] Such as figure 1 As shown: the CVT dry-type electromagnetic unit of this embodiment includes an intermediate transformer 1, a compensating reactor 2 and a speed saturation damper 3; terminal, the secondary outlet terminal 12 of the intermediate transformer 1 is connected to the low-voltage terminal of the capacitor voltage divider 4 through the first concave regulating box 13; the intermediate transformer 1, the compensating reactor 2 and the speed saturation damper 3 are all cast and packaged by insulating resin And be installed in the casing 5.

[0031] In this embodiment, the intermediate transformer 1, the compensating reactor 2 and the fast saturation damper 3 are molded by casting and encapsulating the insulating resin. On the one hand, the structure of each device is relatively compact, and the overall structure inside ...

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Abstract

A novel CVT dry-type electromagnetic unit comprises an intermediate transformer, a compensation reactor and a quick saturation damper. The primary leading-out terminal of the intermediate transformer is connected with the medium-voltage terminal of a capacitive voltage divider through a boss, a secondary leading-out terminal of the intermediate transformer is connected with the low-voltage terminal of the capacitive voltage divider through a first concave regulating box. The intermediate transformer, the compensation reactor and the quick saturation damper are formed in a pouring and packaging mode through insulation resin and installed in a box. The novel CVT dry-type electromagnetic unit is compact in structure, free of condensation, low in partial discharge, high in precision, free of oilation and good in sealing and insulation performance.

Description

technical field [0001] The invention relates to the technical field of CVT, in particular to a CVT dry electromagnetic unit. Background technique [0002] In recent years, with the upgrading of power grid equipment, capacitive voltage transformers (CVT) have gradually replaced traditional electromagnetic voltage transformers. CVT series products can provide electrical signals for electrical measuring instruments, instruments, protection and control devices in high voltage, extra high voltage and extra high voltage power systems with a rated frequency of 50HZ, and also serve as coupling capacitors for power line carrier coupling devices. The CVT is mainly composed of a capacitive voltage divider and an electromagnetic unit. The electromagnetic unit includes intermediate transformers, compensating reactors, lightning arresters and fast saturation dampers. [0003] The front electromagnetic units are oil-immersed and insulated with oil. However, the oil-immersed electromagne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F27/24H01F27/30H01F27/32H01F27/26H01F27/245H01F17/04G01R15/06
CPCG01R15/06H01F17/045H01F27/24H01F27/245H01F27/266H01F27/306H01F27/323
Inventor 周海燕胡美伦罗新民周东李绪涵王东
Owner HUNAN HUAXIONG NEW MATERIALS