Double-power double-winding voltage-reduction two-time voltage-regulation rectifier transformer set suitable for different voltage levels

Abstract

The invention relates to the application technology of aluminum-electricity combined power supply rectifier devices, in particular to a double-power double-winding voltage-reduction two-time voltage-regulation rectifier transformer set suitable for different voltage levels. The double-power double-winding voltage-reduction two-time voltage-regulation rectifier transformer set suitable for different voltage levels resolves the problems of operation and power supply of an isolated power grid which can not be networked. The double-power double-winding voltage-reduction two-time voltage-regulation rectifier transformer set suitable for different voltage levels comprises a voltage-regulation transformer composed of a voltage-regulation transformer primary winding, a voltage-regulation transformer secondary winding and a voltage-regulation transformer reactive compensation winding, wherein the voltage-regulation transformer primary winding and the voltage-regulation transformer reactive compensation winding are located at one side of a voltage-regulation transformer iron core, the voltage-regulation transformer secondary winding is located at the other side of the voltage-regulation transformer iron core, and the input end of the voltage-regulation transformer primary winding is connected with a 330kV or 220kV power source. A secondary voltage-regulation on-load voltage-regulation switch is arranged on the voltage-regulation transformer secondary winding, an output end tap of the secondary voltage-regulation on-load voltage-regulation switch is connected with a rectifier transformer, the voltage-regulation transformer secondary winding is connected with a 110kV power source, and the double-power double-winding voltage-reduction two-time voltage-regulation rectifier transformer set suitable for different voltage levels is used for electrolytic aluminum power supply and rectification.

Description

Technical field [0001] The invention relates to the application technology of an aluminum-electricity joint-operated power supply rectifier device, in particular to a dual-power, double-volume step-down secondary voltage-regulating rectifier transformer set suitable for different voltage levels for aluminum electrolysis. Background technique [0002] Since the electrolytic aluminum smelter is a big power consumer, only one electrolytic aluminum production plant with an annual output of 400,000 tons requires about 720WM of electricity, and the annual power consumption is about 56×10 8 kWh, it is hoped that the electrolytic aluminum smelter will be built in a place where the electricity price is more reasonable. However, with the rising demand for electricity, it is difficult to provide sufficient capacity from the grid to the electrolytic aluminum smelter, and it is necessary to adopt aluminum-electricity joint enterprises. This means that a dedicated or "affiliated" power plant a...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a double-power double-coil step-down secondary voltage-regulating rectifier transformer group suitable for different voltage levels for aluminum electrolysis, so as to solve the problems of isolated grid operation and power supply that are not allowed to be networked in the prior art

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