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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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  • Claims
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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 power distribution network relay protection method and system. The method includes the steps: acquiring fault information acquired by a centralized protection system structure and intelligent terminal devices in a protection area; judging fault types including internal faults and external faults according to the fault information; checking whether a bus is normal or not and switching off a relay protection switch at the position of the bus according to preset time when the bus is abnormal if the internal faults exist; disconnecting a power distribution network from an external network after detecting reverse power at a grid connection point if the external faults exist. Fault components are automatically, rapidly and selectively cut off from an electricpower system and prevented from being continued to be damaged, and other fault-free portions can rapidly recover 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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