Saturated core type superconductive current limiter for strengthening insulating performance through nitrogen

A superconducting current limiter and reinforced insulation technology, applied in the usage of superconductor elements, emergency protection circuit devices for limiting overcurrent/overvoltage, electrical components, etc. performance, prolonging the service life, and ensuring the safety of equipment operation

Active Publication Date: 2014-09-17
云南电力试验研究院(集团)有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The pressure inside the shell is equal to the ambient pressure, making it easy for ambient water vapor to penetrate into the shell to form a humid operating environment, which is likely to cause a drop in insulation resistance

Method used

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  • Saturated core type superconductive current limiter for strengthening insulating performance through nitrogen

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Embodiment Construction

[0018] The embodiment of the saturated iron core type superconducting current limiter using nitrogen to enhance the insulation performance of the present invention is as follows figure 1 As shown, it includes an iron core 1, an AC winding 2, and a superconducting DC winding wrapped in a Dewar 3 filled with liquid nitrogen. The Dewar 3 is provided with an exhaust pipe connected to the heating outside the casing 6. 5, the heater is provided with an air intake pipe connected to the shell, and the shell is also provided with an air outlet; the shell is also provided with a liquid nitrogen storage tank 4, and the liquid nitrogen in it is connected to the Dewar through the infusion pipe to replenish the Dewar. Nitrogen; the shell is an ordinary shell that has certain airtightness but does not need to be strictly sealed.

[0019] During work, the liquid nitrogen in the Dewar volatilizes and transports it to the heater 5 through the exhaust pipe, after changing the low-temperature nit...

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Abstract

The invention discloses a saturated core type superconductive current limiter for strengthening the insulating performance through nitrogen. The saturated core type superconductive current limiter comprises iron cores arranged in an outer shell, alternating current windings and a superconductive direct current winding wrapped in a Dewar bottle with the liquid nitrogen, and is characterized in that an air outlet pipe is arranged on the Dewar bottle to be communicated to a heater outside the outer shell, the heater is provided with an air inlet pipe which is communicated to the interior of the outer shell, and an air outlet is further formed in the outer shell. According to the saturated core type superconductive current limiter, the nitrogen discharged out from the Dewar bottle can be recycled through the additionally-arranged air outlet pipe and heated to be discharged into the outer shell for use to enable the pressure inside the outer shell to be higher than the environment pressure, and environment moisture is prevented from permeating into the outer shell; meanwhile, moisture in the outer shell is discharged out of the outer shell through the nitrogen, a dry operation environment is provided for the saturated core type superconductive current limiter, and therefore the problem that insulation resistance is reduced is solved.

Description

technical field [0001] The invention relates to a saturated iron core type superconducting current limiter, in particular to a saturated iron core type superconducting current limiter which utilizes nitrogen to enhance insulation performance. Background technique [0002] The body of the saturated iron core type superconducting current limiter is mainly composed of an iron core included in the casing, an AC winding, and a superconducting DC winding, wherein the superconducting DC winding is set in a Dewar filled with liquid nitrogen; the AC winding is a primary winding, Its voltage is grid voltage and requires good and reliable insulation. [0003] According to the different insulation medium of AC winding, the insulation structure of saturated iron core superconducting current limiter is divided into three categories: air insulation (dry type), oil-immersed insulation and gas insulation. Air insulation (dry type) relies on epoxy resin and air to insulate AC windings from o...

Claims

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Application Information

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IPC IPC(8): H02H9/02
CPCY02E40/69Y02E40/60
Inventor 陈辉祥洪辉朱浩骏韦斌余梦泽牛国俊牛潇晔熊志全
Owner 云南电力试验研究院(集团)有限公司
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