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Novel transformer neutral point DC magnetic bias suppression device

A transformer neutral point, DC bias suppression technology, applied in overvoltage protection resistors, emergency protection circuit devices, resistors, etc., can solve the problems of heat dissipation and anti-corrosion of zinc oxide valve plates, and accelerate water flow , The effect of accelerating the heat conduction speed

Active Publication Date: 2018-10-12
STATE GRID CORP OF CHINA +3
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problems existing in the prior art that the zinc oxide valve plate cannot be dissipated and protected against corrosion during the DC transformer suppression operation, the purpose of the present invention is to provide a novel transformer neutral point DC bias suppression device, It can realize the heat dissipation and anti-corrosion effect of the zinc oxide valve plate in a variety of environments

Method used

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  • Novel transformer neutral point DC magnetic bias suppression device
  • Novel transformer neutral point DC magnetic bias suppression device
  • Novel transformer neutral point DC magnetic bias suppression device

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Embodiment 1

[0032] see Figure 1-10 , a new transformer neutral point DC bias suppression device, including a main frame 18, a layer of insulation layer 2 wrapped outside the main frame 18, a sensed power supply 27 and a DC blocking controller 28 are installed at the left and right ends of the inner top of the main frame 18, the main body A low-voltage capacitor 43 is installed on the upper layer of the frame 18, a Locke transformer 3 is installed on the bottom of the upper layer of the main frame 18, fixed brackets 4 are connected to both sides of the lower layer of the main frame 18, and a high-energy zinc oxide component 10 is connected to the fixed bracket 4, and the lower layer of the main frame 18 The bottom is fixed with a bypass switch 8, the bottom of the main frame 18 is provided with a high-voltage opening and closing door 6, the bottom of the main frame 18 is connected with a base 7, and the high-energy zinc oxide component 10 is provided with a zinc oxide valve plate 14, zinc ...

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PUM

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Abstract

The invention discloses a novel transformer neutral point DC bias magnetic suppression device, belonging to the field of DC voltage transformation suppression. The novel transformer neutral point DC bias magnetic suppression device suppresses DC current from flowing into a transformer by means of series capacitors at a neutral point during DC voltage transformation suppression. After the system has a fault such as one-phase ground, extremely high over-voltages appear at two ends of the capacitors. To reduce the voltage resistance of the capacitors, corresponding measures must be taken to effectively protect the capacitors. The capacitors can be protected by a zinc oxide valve and a bypass switch. However, during the operation, the zinc oxide valve may suddenly overheat or explode due to alarge amount of direct current flowing in a short time.

Description

technical field [0001] The invention relates to the field of DC voltage transformation suppression, and more specifically relates to a novel transformer neutral point DC bias suppression device. Background technique [0002] The DC bias suppression device at the neutral point of the transformer suppresses the flow of DC current into the transformer by connecting a capacitor in series at the neutral point. When a single-phase ground fault occurs in the system, a very high overvoltage will appear at both ends of the capacitor. To reduce the capacitor If the pressure resistance is high, corresponding measures must be taken to effectively protect the capacitor. [0003] However, the previous new transformer neutral point DC bias suppression device cannot play a role in heat dissipation and anti-corrosion of the zinc oxide valve plate. Contents of the invention [0004] 1. Technical problems to be solved [0005] Aiming at the problems existing in the prior art that the zinc ...

Claims

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Application Information

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IPC IPC(8): H02H7/04H01C1/082H01C1/084H01C7/12
CPCH01C1/082H01C1/084H01C7/126H02H7/04
Inventor 丁国成陈庆涛王刘芳吴兴旺杨海涛尹睿涵穆永保闫柯柯姚孟李鑫刘勇奚涛
Owner STATE GRID CORP OF CHINA
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