Wide-area distance protecting method for transformer substations

A distance protection and substation technology, applied in the direction of emergency protection circuit devices, electrical components, circuit devices, etc., can solve the problems of slow action time, threats to the safe and stable operation of the system, and the action time cannot meet the system, so as to ensure safe and stable operation. Effect

Active Publication Date: 2014-10-01
CHINA SOUTHERN POWER GRID COMPANY +1
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Problems solved by technology

Since the remote backup protection needs to consider the coordination relationship between segments, its action time is relatively slow. In severe c

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  • Wide-area distance protecting method for transformer substations
  • Wide-area distance protecting method for transformer substations
  • Wide-area distance protecting method for transformer substations

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Embodiment Construction

[0018] The present invention provides a substation-oriented wide-area distance protection method. In order to better understand the technical content of the present invention, specific embodiments are given and described as follows with accompanying drawings.

[0019] first of all, yes figure 1 The regional power grid shown in the diagram builds a master-substation protection and control system with multiple substations: select a substation in the regional power grid as the master substation (generally the main power supply substation), and select station A as the master station in this embodiment. Set up the protection and control master station device at the master station to complete the protection and control function of the master station. Set up a set of protection and control sub-station devices in all substations (including main station A) of the regional power grid to complete the protection and control functions of the sub-stations. The communication network between...

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Abstract

The invention discloses a wide-area distance protecting method for transformer substations. The wide-area distance protecting method for the transformer substations comprises the steps that a master station-substation protection control system comprising a master station and multiple substations is established in a regional power grid; on-site judgment of wide-area distance protection is completed by the substations with the transformer substation with secondary direct-current power supply disappearing and a line connected with the transformer substation as protection targets, and the information is uploaded to the master station; after the master judges that a certain transformer substation loses power, wide-area distance protection of the power-losing area of the transformer substation is completed according to the on-site information uploaded by the substations, and then faults in the power-losing area of the transformer substation are isolated rapidly. According to the wide-area distance protecting method for the transformer substations, when the serious accident that the secondary direct-current power supply of the transformer substation in the power grid disappear, the faults in the power-losing area in the transformer substation can isolated rapidly, and safe and stable operation of the power grid is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of intelligent substation operation, in particular to a substation-oriented wide-area distance protection method. Background technique [0002] The disappearance of the secondary DC power supply of the power substation (the DC loss of the protection device or the DC loss of the operating power supply) is a serious accident in the operation of the substation. After the secondary DC power supply disappears, all the protection devices or operating circuits of the substation cannot work. The main transformer, bus differential, high reactance, and line outlets all lose protection. Once a fault occurs, the station will have no protection action, and must wait for the delay action of remote backup protection of other adjacent stations to isolate the fault. Such as figure 1 Substation C in substation C loses all power. When the f1 fault occurs on the AC line, the line protection of CB2 cannot operate to remove the ...

Claims

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Application Information

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IPC IPC(8): H02H7/26H02J13/00
CPCY02E60/00Y04S10/16Y04S10/20
Inventor 文安李园园赵曼勇李力李建设戴光武黄维芳朱晓彤陈朝晖
Owner CHINA SOUTHERN POWER GRID COMPANY
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