Distributed power distribution network relay protection method and system

A distributed distribution network and relay protection technology, applied in emergency protection circuit devices, electrical components, fault detection by conductor type, etc. Problems such as large randomness of access grid system

Inactive Publication Date: 2018-03-30
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
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Problems solved by technology

In addition, due to the influence of weather and other factors, the randomness of distributed power generation access to the grid system is relatively large, which is not convenient for unified scheduling, which brings great difficulties to the configuration and setting of relay protection

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  • Distributed power distribution network relay protection method and system
  • Distributed power distribution network relay protection method and system

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Embodiment Construction

[0038] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. 的实施例。 Example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0039] The rapid development of distributed power generation technology makes the grid-connected capacity of distributed power generation larger and larger, and its impact on the grid system cannot be ignored. The access of distributed power sources has changed the structure of the original grid system, thus causing changes in the protection detection current. In addition, due to the influence o...

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Abstract

The invention provides a distributed distribution network relay protection method and system, including obtaining the centralized protection system structure of the protection area and the fault information collected by each intelligent terminal device in the protection area; judging the fault type according to the fault information, wherein the fault type Including internal faults and external faults; if it is an internal fault, check whether the bus is normal, and disconnect the relay switch at the bus position according to the preset time if it is abnormal; if it is an external fault, detect the reverse at the grid connection point After power on, disconnect the distribution network from the external network. The invention realizes the automatic, rapid and selective removal of faulty components from the power system, prevents the faulty components from being further damaged, and ensures that other non-faulty parts quickly recover to normal operation.

Description

Technical field [0001] The present invention relates to the technical field of relay protection, in particular to a relay protection method and system for a distributed distribution network. Background technique [0002] The rapid development of distributed power generation technology makes the grid-connected capacity of distributed power generation larger and larger, and its impact on the grid system cannot be ignored. The access of distributed power sources has changed the structure of the original grid system, which has caused changes in the protection detection current. In addition, due to the influence of weather and other factors, the randomness of distributed power access to the grid system is relatively large, which is not convenient for unified dispatch, which brings great difficulties to the configuration and setting of relay protection. Summary of the invention [0003] In view of this, the purpose of the present invention is to provide a relay protection method and sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/26H02H7/22G01R31/08
CPCH02H7/26G01R31/086H02H7/22
Inventor 郑宇航齐郑
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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