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Safe automatic control method suitable for transforming plant main transformer tripping

A self-input technology of substation and backup power supply, which is applied in the direction of emergency power supply arrangement, electrical components, circuit devices, etc., can solve the problems of power supply reliability overload, substation main transformer capacity release, etc., and achieve the effect of solving overload

Active Publication Date: 2009-07-08
STATE GRID ZHEJIANG ELECTRIC POWER CO LTD HANGZHOU POWER SUPPLY CO +1
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Problems solved by technology

[0008] Purpose of the present invention: In order to solve the problem of the release of the main transformer capacity of the substation with three or more main transformers and the reliability of the power supply and the safety of the main transformer when the main transformer trips and fails in the substation with three or more transformers overload problem

Method used

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  • Safe automatic control method suitable for transforming plant main transformer tripping
  • Safe automatic control method suitable for transforming plant main transformer tripping
  • Safe automatic control method suitable for transforming plant main transformer tripping

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Embodiment Construction

[0052] figure 1 It is a schematic diagram of the typical wiring mode of a substation with three main transformers running at present. 1# main transformer and 3# main transformer run on the main bus, and 2# main transformer runs on the auxiliary bus; the 220kV bus tie switch is closed and runs in parallel; The 110kV bus-tie switch is split and operates separately.

[0053] figure 2 For the system configuration of the device in the embodiment of the backup power self-switching method, the distributed arrangement of the device as a master and a slave is realized. The master performs the main logic calculation of the backup power scheme; the slave mainly collects the operating status of the main transformer, including the three-phase voltage, current, power, switching and tripping status of the high-voltage side, medium-low voltage side of the main transformer, and executes the information sent by the master. Trip exit command. At the same time, the host also supports the comm...

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Abstract

The invention discloses a safety automatic control method suitable for a main transformer of a transformer station during the tripping process. The method is characterized in that on the transformer stations with three and more running main transformers, the buses at the high-voltage sides of the main transformers run in parallel, and the buses at the middle and low voltage sides of the main transformers run in parallel; after the electrical characteristics of the main transformers and the buses meet the charging conditions of spare power automatic switching, the spare power automatic switching is enabled, and if the main transformers trip at the moment through detection, the spare power automatic switching of the transformer station is realized according to the running modes of the main transformers and the bus-tie circuit breakers or the section switches at the medium-voltage sides or the low-voltage sides of the main transformers; and when the electrical characteristics of the main transformers and the buses meet the discharging conditions of spare power automatic switching, the spare power automatic switching of the transformer station is locked. The invention has the advantages that the method can effectively solve the problems of capacity release of the main transformers of the transformer station and the reliability of power supply of the transformer station during the process of trip fault of the main transformers.

Description

technical field [0001] The invention belongs to the field of electric power automation technology control, and in particular relates to a safety automatic control method suitable for substations with three or more main transformers running, more specifically, when the main transformer is tripped, it passes through the medium voltage side of the main transformer. Or the low-voltage side bus tie switch or section switch to realize the automatic switching of the power supply. Background technique [0002] With the continuous development of economy and society, users' demand for power is also increasing, and at the same time, the reliability of power supply is also getting higher and higher. Power transmission and distribution capacity. At present, there are generally two options for improving power transmission and distribution capacity: one is to build a new substation, and the other is to add power transmission and distribution equipment to an already operating substation. H...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/06
Inventor 应康杨漪俊黄武浩凌昉徐翔海
Owner STATE GRID ZHEJIANG ELECTRIC POWER CO LTD HANGZHOU POWER SUPPLY CO
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