Station domain backup protection method for intelligent transformer substation

A technology of intelligent substation and backup protection, applied in the field of intelligent substation, can solve the problems of lower reliability of the secondary circuit, high investment cost, non-sharing of information, etc., and achieve the effect of improving the operation speed and reducing the performance requirements.

Inactive Publication Date: 2018-09-04
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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Problems solved by technology

[0006] Taking the configuration of the secondary winding of the current transformer in the traditional substation as an example, in the interval of the high-voltage side of the transformer, the current transformer needs to be equipped with transformer differential, bus differential, backup protection, failure protection, fault recording, metering, measurement, etc. More than 10 groups of secondary windings, not only the hardware configuration is repeated, the information is not shared, the investment cost is high, but also the complicated wiring will reduce the reliability of the secondary circuit and directly affect the normal operation of the relay protection

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  • Station domain backup protection method for intelligent transformer substation
  • Station domain backup protection method for intelligent transformer substation

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[0033] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0034] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0035] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinatio...

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Abstract

The invention belongs to the field of intelligent transformer substations, and particularly relates to a station domain backup protection method for an intelligent transformer substation. The stationdomain backup protection method includes: obtaining the voltage and current sampling values acquired by merging units in the station through an SV network in a transformer substation process layer; acquiring position information of circuit breakers in the station and action information of all the main protections through a GOOSE network in the process layer; and acquiring the circuit breaker position information of a line-to-end substation, the main protection action information, and the action information of opposite terminal station domain backup protection through inter-station data channels. The invention is scientific and reasonable, and has a high speed, high sensitivity and high reliability.

Description

technical field [0001] The invention belongs to the field of intelligent substations, and in particular relates to a backup protection method for a station domain of an intelligent substation. Background technique [0002] In the power system (ultra) high-voltage substation, in order to meet the system stability requirements and ensure the safe operation of the equipment, an independent and dual configuration of main protection and backup protection should be adopted. The dual main protection generally adopts the current differential principle or the longitudinal direction (distance) principle. The main protection should have good quick action and selectivity, and can accurately and quickly remove various forms of internal faults. Backup protection (including far backup and near backup) is the protection used to cut off the faulty equipment when the main protection or circuit breaker refuses to move. Backup protection generally adopts the principle of staged distance protec...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/22
CPCH02H7/22
Inventor 王军赵斌超张国辉史方芳张婉婕黄秉青杨超王宏吕晓平王磊磊张林峰丁月明
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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