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Method and system for overload protection in transformer substation self-switching matching process

A substation, self-cutting technology, applied in the field of electric power, can solve problems such as substation faults

Inactive Publication Date: 2014-09-24
STATE GRID CORP OF CHINA +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] The invention provides a method and system for preventing overload of a substation when self-cutting and matching, which can effectively prevent the overload of the substation and solve the problem of failure of the substation caused by the overload of the substation

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  • Method and system for overload protection in transformer substation self-switching matching process

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Embodiment Construction

[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0051] In the actual operation of the power grid, if the lower-level self-cutting action is completed, when the N-1 situation occurs in the 220kV substation, most of the load will be transferred from the busbar of the lower-level substation, and it is likely to be transferred to other 220kV substations. When calculating its N-1, it needs to be considered jointly with the N-1 transfer path of the lower-level substation to calculate whether the transferred load w...

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Abstract

The invention provides a method and system for overload protection in the transformer substation self-switching matching process. Power grid device parameters, the topological connection relation, real-time operation data and a self-switching device matching rule are comprehensively considered, the power grid topological change generated after N-1 times of calculation is accurately judged, and an operation result is obtained through a trend algorithm. When the operation result shows that a transformer substation is overloaded, a load is transferred; when the transformer substation is not overloaded, rehearsal is conducted. Thus, the transformer substation can be effectively prevented from being overloaded, the problem that the transformer substation breaks down due to the fact that the transformer substation is overloaded is solved, a plan result of the transformer substation can meet the actual operation condition, and accuracy and practicality of calculation are improved.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a method and system for preventing overload when a substation is self-cut and matched. Background technique [0002] The safe and stable operation of substations is a very important factor for the power system to ensure safe and reliable power supply. Among them, the primary equipment of the substation is the equipment that directly coordinates and controls the power grid, and its operation status directly affects the safety and stability of the power system. [0003] N-1 calculation is an important content in power system stability analysis and calculation, and is a very important safety check method in power grid dispatching operation. Based on the N-1 calculation of the main transformer and line in the primary equipment of the substation, the accident rehearsal of the substation can ensure the safe and stable operation of the substation. However, as the level of auto...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
CPCG06F16/2458
Inventor 王文林邵名声程金松胡海琴
Owner STATE GRID CORP OF CHINA
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