Parallel power supplying method of electrolytic aluminum different-power-supply-point direct-current sides

A power supply method, electrolytic aluminum technology, applied in the direction of emergency power supply arrangements, electrical components, circuit devices, etc., can solve the problems of poor self-stress adjustment ability, power supply system dependence on large power grids, etc., to reduce overshoot and reduce cross-network the risk, the effect of avoiding the impact

Inactive Publication Date: 2015-08-12
JIUQUAN IRON & STEEL GRP
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Problems solved by technology

[0003] The purpose of the present invention is to provide a parallel power supply method on the DC side of different power points of electrolytic aluminum, which has solved the problem in the prior art that the power supply system of electrolytic aluminum enterprises is too dependent on the large power grid and has poor self-stress adjustment ability

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  • Parallel power supplying method of electrolytic aluminum different-power-supply-point direct-current sides

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings.

[0015] A parallel power supply method for DC sides of different power supply points of electrolytic aluminum, which is used for conversion between public power grids and autonomous power grids. The public power grid is connected to the independent power grid with an AC power supply bus, and a segmental transfer switch is installed on the AC power supply bus, and a rectifier unit is installed between the AC power supply bus and the electrolytic aluminum DC bus. There is a switching station between the autonomous power grid and the AC power supply busbar. A substation is provided at the connection end between the switch station and the AC power supply busbar.

[0016] When the power grid is working normally, the sub-section transfer switch is in the off state, and the electrolytic aluminum operation mainly relies on the power supply of the independent power grid. When ...

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Abstract

The invention provides a parallel power supplying method of electrolytic aluminum different-power-supply-point direct-current sides, and belongs to the technical field of electric power system operation and control. The method is used for convention between a public power grid and an autonomous power grid. The public power grid and the autonomous power grid are connected with different alternating-current power supplying buses. The different alternating-current power supplying buses are provided with sectionalized change-over switches. Rectification units are arranged between the different alternating-current power supplying buses and an electrolytic aluminum direct-current bus. Switch stations are arranged between the autonomous power grid and the alternating-current power supplying buses. Power substations are arranged on the connecting ends between the switch station and the alternating-current power supplying buses.

Description

technical field [0001] The invention belongs to the technical field of power system operation and control, and in particular relates to a parallel power supply method at DC sides of different power supply points of electrolytic aluminum. Background technique [0002] At present, grid-connected power plants of domestic enterprises are affected by factors such as grid access, environmental protection audits, and power supply approval policies, and cannot be put into operation on schedule. In order to ensure that electrolytic aluminum is put into production on schedule, the power grid supporting electrolytic aluminum must be operated in two ways: "AC off-grid, DC grid-connected" and "AC standby" to realize the industrial adjustment of "coal-electricity-aluminum integration". The current common electrolytic aluminum production system corresponds to the 330kV power distribution device, and adopts a double-busbar connection system. The incoming lines of the busbars in sections I a...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/06H02J3/46C25C3/16
Inventor 丁宝忠刘建平朱凯伍光慰邹晓东
Owner JIUQUAN IRON & STEEL GRP
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