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Power system three-defense-line structure based on circuit breaker failure protection backup

A technology of failure protection and three lines of defense, which is applied in the direction of emergency protection circuit devices, automatic disconnection emergency protection devices, electrical components, etc., can solve problems such as deteriorating power system operating environment, system collapse, and squeezing control space, achieving Prevent the control effect from weakening, improve the operating mechanism, and compensate for the effect of the control effect

Pending Publication Date: 2022-03-01
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +3
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This situation deteriorates the operating environment of the power system, squeezes the control space, and prolongs the abnormal operation time of the power system. It is not economical, reliable or allowed
When the system decommissioning fails, the system will continue to deteriorate, leading to the risk of system collapse, resulting in extremely serious consequences

Method used

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  • Power system three-defense-line structure based on circuit breaker failure protection backup
  • Power system three-defense-line structure based on circuit breaker failure protection backup

Examples

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Embodiment Construction

[0029] The application will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, but not to limit the protection scope of the present application.

[0030] By introducing the failure protection as the backup measure of the three defense lines of the power system, the invention separates the failure protection as the backup measure of the overall system of the power system stability and safety defense system.

[0031] Such as figure 1 As shown, the three-line defense structure of the power system based on circuit breaker failure protection backup according to the present invention includes failure protection device, relay protection, stability control system and out-of-step disassembly system, relay protection, stability control system and failure The step-disconnection system is connected to the failure protection device, and the failure prote...

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Abstract

The invention discloses an electric power system three-defense-line structure based on circuit breaker failure protection backup, which comprises a failure protection device, a relay protection and stability control system and an out-of-step disconnection system, and is characterized in that the relay protection and stability control system and the out-of-step disconnection system are connected to the failure protection device, and the failure protection device is connected with a circuit breaker and is used for tripping off an element or a line; any one of the relay protection system, the stability control system and the out-of-step disconnection system is used for realizing protection success if the circuit breaker is successfully tripped off when a tripping signal of the circuit breaker is output, outputting a failure starting signal if the circuit breaker fails to be disconnected, starting failure protection, and indirectly realizing disconnection by cutting off all other elements or lines on a bus connected with the elements through a failure protection device.

Description

technical field [0001] The invention belongs to the field of power system operation control, and in particular relates to a power system three-line defense structure based on circuit breaker failure protection backup. Background technique [0002] As the scale of the power grid system continues to expand, whether the power system can maintain stability, and whether it can enter a new stable state after large or small disturbances, is particularly important for the safe and reliable operation of the power system. Large-scale power grids, especially the high-proportion new energy AC-DC hybrid grids connected to UHV DC and large-scale new energy sources, have gradually become the development trend of large-scale power grids, and their security and stability are particularly important. [0003] In the current configuration of the secondary system and the three lines of defense, the relay protection, stability control system and out-of-step separation are configured separately, i...

Claims

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Application Information

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IPC IPC(8): H02H7/26H02H3/06
CPCH02H7/262H02H3/066
Inventor 党一奇荆琳姚峰陈文哲刘磊王骅韩伟马伟东陈宇
Owner STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST
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