Method of secondary side connecting reactive power generator of smelting transformer

Abstract

The method includes following approaches: (1) a new type reactive power generator is connected in parallel to three phases of major loop at secondary side in three phase three wire system or three phase four wire system; (2) or a new type reactive power generator is connected in parallel to head part of secondary winding of three phases of major loop at secondary side in three phase three wire system as well as a new type reactive power generator is connected in parallel to tail part of secondary winding of three phases; (3) or in building block mode, multiple combined new type reactive power generators are connected in parallel. Disclosed generator takes in and sends out large reactive components, compensates current. Features are: quick response, accurate control of voltage.

Description

technical field [0001] The utility model relates to reactive power compensation and harmonic elimination of electric power grid, in particular to a method for connecting a novel reactive power generator on the secondary side of a smelting transformer. Background technique [0002] In order to ensure the power quality of power supply and consumption, and reduce the reactive power and harmonic current transmitted through the power grid, the power system generally installs reactive power compensation and harmonic elimination on the primary side of the smelting transformer, that is, the transmission system. This technology is currently relatively Mature technology and commonly used technology, but the use of primary side devices for compensation does not allow reactive power and harmonic current to flow on the shortest path, the purpose of on-site compensation cannot be achieved, and the effect of increasing production and reducing energy consumption is very limited . Since the...

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Problems solved by technology

[0002] In order to ensure the power quality of power supply and consumption, and reduce the reactive power and harmonic current transmitted through the power grid, the power system generally installs reactive power compensation and harmonic elimination on the primary side of the smelting transformer, that is, the transmission system. This technology is currently relatively Mature technology and commonly used technology, but the use of primary side devices for compensation does not allow reactive power and harmonic current to flow on the shortest path, the purpose of on-site compensation cannot be achieved, and the effect of increasing production and reducing energy consumption is very limited

Since the secondary side of the smelting transformer and the lines on the secondary side are the source of reactive power and harmonics, the reactive power and harmonics must pass through the secondary side of the transformer and the lines on the secondary side and the reactive power compensation installed on the primary side. The device undergoes energy exchange, and there is a long exchange path, which cannot achieve dynamic real-time compensation and in-situ compensation.

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