Method for preventing power grids being damaged by solar magnetic storms and nuclear pulse

A solar magnetic storm, nuclear pulse technology, applied in the direction of grounding devices, etc., can solve the problems of increasing noise, shortening the life of transformers, destroying winding insulation, etc., and achieving the effect of reducing the impact

Active Publication Date: 2014-09-24
STATE GRID CORP OF CHINA +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The direct phenomenon of the neutral point current flowing through the transformer winding is that the transformer noise increases
The DC current flows through the transformer, which will increase the noise and shorten the life of the transformer, or damage the winding insulation in severe cases, causing major accidents

Method used

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  • Method for preventing power grids being damaged by solar magnetic storms and nuclear pulse
  • Method for preventing power grids being damaged by solar magnetic storms and nuclear pulse
  • Method for preventing power grids being damaged by solar magnetic storms and nuclear pulse

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] At present, the neutral point grounding method of domestic and foreign power grids adopts figure 2 the way shown. According to this connection method, the lines in a synchronous power grid, the main transformer winding, the metal grounding grid, the main transformer windings of each power station, and the grounding grid of the power station are all connected together. That is to say, the entire power grid is actually a metal conductor. When solar ions hit the power grid in a certain area, this positive potential, non-periodic, and DC charge must spread to the rest of the large metal body of the power grid, and which Where the soil has high electrical conductivity and fast diffusion, the neutral point current will be large wherever the grounding effect is. Therefore, the neutral point current is the largest in the place with the best grounding e...

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Abstract

The invention discloses a method for preventing power grids being damaged by solar magnetic storms and nuclear pulse. The method comprises the following steps that: 1, the grounding grid for a neutral point of power transmission line on the power grid side of a power plant is independent of a plant grounding grid, and keeps distance with the plant grounding grid; 2, if neutral points on two sides of the transformer of a transformer substation needs to be grounded, the grounding grids thereof keep mutually independent, and keep distance with each other. According to the method, the manner that the transformer neutral point in the current alternating current synchronous power grid is directly connected with the public grounding grid of the power plant or the transformer substation is changed to be an independently grounding manner, the metallic connection channel of geomagnetically induced current is blocked, and thereby the geomagnetically induced current is partly absorbed, and the risk of causing destruction due to that the geomagnetically induced current is concentrated in one place to release is avoided.

Description

technical field [0001] The invention relates to a method for preventing solar magnetic storms and nuclear pulses from harming power grids. Background technique [0002] As we all know, power grids are divided into synchronous power grids and asynchronous power grids. A power grid connected by an AC transmission line is a synchronous power grid. If there is no other AC connection line between two power grids connected by a DC transmission line, the two power grids are asynchronous. Of course, if there is no tie line between the two grids, the two grids are of course independent and of course asynchronous. With the development of UHV technology in China, regional power grids are interconnected through UHV AC or DC lines. The power grid connected by UHV AC will constitute a larger-scale AC synchronous power grid, and the security of the synchronous power grid is becoming increasingly important. The reason why my country develops UHV AC and DC networking technologies at the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02B1/16
Inventor 丁卫东苏文博
Owner STATE GRID CORP OF CHINA
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