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Station domain protection method, device, terminal and medium for missing measurement information

A technology for measuring information and station area protection, applied in emergency protection circuit devices, electrical components, etc., can solve problems such as failure to quickly and accurately remove faults, lack of measurement information, etc., and achieve low cost, accurate fault removal, and easy implementation. Effect

Active Publication Date: 2022-04-26
GUANGDONG POWER GRID CO LTD +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The purpose of the present invention is to provide a station area protection method, device, terminal and medium for the lack of measurement information. failure problem

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  • Station domain protection method, device, terminal and medium for missing measurement information
  • Station domain protection method, device, terminal and medium for missing measurement information
  • Station domain protection method, device, terminal and medium for missing measurement information

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Embodiment Construction

[0041] 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 creative efforts fall within the protection scope of the present invention.

[0042] It should be understood that the step numbers used herein are only for convenience of description, and are not intended to limit the execution order of the steps.

[0043] It should be understood that the terminology used in the description of the present invention is for the purpose of describing particular embodiments only and is not intended to limit the present invention. As used in this specification and the appended claims, the singular forms "a", "an"...

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Abstract

The invention discloses a station area protection method for the lack of measurement information, including that if the measurement information on the connection line between the transformer and the bus in the substation to be tested is missing, the outgoing current of the transformer and the bus is used to form a large difference protection, and if the current differential current satisfies the The preset criterion calculates the time difference between the fault occurrence time and the differential current; if the time difference is not greater than the first preset threshold, it is judged whether the current differential current meets the transformer excitation inrush current criterion; if not, a trip command is sent to the transformer and the bus Connect the circuit breaker on the line; judge whether the auxiliary contact of the circuit breaker is disconnected; if so, use the bus outlet current to form a bus differential protection, and send a trip command to the bus outlet when the bus differential current meets the preset criteria; if not, And when the detection time does not reach the second preset threshold, it returns to judge whether the auxiliary contact of the circuit breaker is disconnected. The present invention can quickly and accurately remove the fault when the information is missing, and has the advantages of low cost and easy implementation.

Description

technical field [0001] The present invention relates to the technical field of substation domain protection, in particular to a method, device, terminal and medium for substation domain protection to deal with missing measurement information. Background technique [0002] In the power system, when the substation-based centralized station protection system is adopted, the substation is often prone to lack of measurement information on the connection line between the transformer and the busbar, which will cause some protection of the station to fail to work normally and increase the risk of failure. and hidden dangers. Therefore, how to provide a station domain protection method that can quickly and accurately identify and remove faults in the absence of measurement information is one of the technical problems to be solved urgently in this field. Contents of the invention [0003] The purpose of the present invention is to provide a station domain protection method, device,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/045H02H7/26
CPCH02H7/045H02H7/263
Inventor 王育学刘玮王增超黄明辉李一泉邓旭阳陈桥平刘世丹刘琨吴梓亮王峰
Owner GUANGDONG POWER GRID CO LTD
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