Ice-melting method with voltage reduction, current increase and short circuit by using series connection of two transformers

Abstract

The invention relates to an ice-melting method with voltage reduction, current increase and short circuit by using series connection of two transformers. In the ice-melting method, a high-voltage transformer (2) is electrically connected in series with a high-voltage transformer (3) according to voltage reduction functions of high-voltage transformers, an initial power source (1) is connected to a high-voltage side of the high-voltage transformer (2), and a low-voltage side of the high-voltage transformer (3) is electrically connected with an ice-coated wire (6) through an electric switch (5). According to conditions of the ice-coated wire and parameters of ice-melting equipment, a three-phase short-circuit connection point (7) of the ice-coated wire (6) is selected and an earthing knife-switch (8) is mounted; after the voltage of the initial power source (1) is reduced by the high-voltage transformer (2), the voltage of the initial power source (1) is further reduced by the high-voltage transformer (3) to acquire an ice-melting power source (4) with low voltage and high current intensity; and then the electric switch (5) is switched on, and the ice-melting power source (4) can melt the ice on the ice-coated wire (6).

Description

technical field [0001] The invention relates to a short-circuit ice-melting method with double transformers connected in series to reduce voltage and increase current, in particular to electrically connecting two high-voltage transformers in series, and using the high-voltage transformer to perform secondary step-down of the initial power supply to become an ice-melting power supply with reduced voltage and increased current , Three-phase short-circuit at one end of the ice-coated wire that needs to be melted, and the other end of the line passes through a safe ice-melting power supply, so that the line heats up and melts the ice. Background technique [0002] In recent years, the number of icing disasters caused by transmission lines has increased, the scale has expanded, and the damage has increased, which has brought a huge impact on the normal operation of the power grid and people's living standards. [0003] In order to solve the problem of icing on transmission lines ...

AI Technical Summary

Problems solved by technology

However, the structure of the controllable rectification device is relatively complicated; the harmonic content is high and the reactive power loss is large during operation, so it is necessary to configure an AC filter with a certain capacity for reactive power compensation and filtering; and it is necessary to configure responsive protection equipment, which requires a considerable investment

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