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Intelligent network type power protection method and protection device

A power protection and intelligent network technology, applied in emergency protection circuit devices, electrical components, etc., can solve the problems of difficult setting, long fault removal time, difficult coordination, etc., achieve accurate fault point selection, short protection action time, The effect of zero-time fault clearing

Active Publication Date: 2019-11-26
张学圈
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems existing in the relay protection devices at all levels of the existing power system, such as difficult coordination, difficult value setting, and long fault removal time, the purpose of the present invention is to provide an intelligent Network type power protection method and protection device

Method used

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  • Intelligent network type power protection method and protection device
  • Intelligent network type power protection method and protection device

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Experimental program
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Embodiment 1

[0050] like Figure 1~2 As shown, the intelligent network-based power protection method provided in this embodiment may, but is not limited to, include the following steps S101-S105.

[0051] S101. Collect the electrical analog quantity of the node, wherein the node, the adjacent nodes on the first side and the adjacent nodes on the second side located around the node are respectively intelligent network-type power protection devices in the power system, The first side and the second side are respectively the two ends of the current direction flowing through the node.

[0052] In the step S101, as figure 2 As shown, each digital node (such as node 4 or 7, etc.) needs to be equipped with an intelligent network power protection device in order to execute the intelligent network power protection method described in steps S101-S105; these power protection devices are in When it is found that the fault location of the system is at the local node, the relay can be driven to perfo...

Embodiment 2

[0079] like image 3 and 4 As shown, compared with Embodiment 1, this embodiment provides a hardware device based on the same inventive concept and implementing the intelligent network power protection method as described in Embodiment 1, including an analog quantity acquisition module, a system fault discrimination module, A network communication module, a fault location module and an exit trip execution module; the analog quantity acquisition module is used to collect the electrical analog quantity of the node; the system fault discrimination module is used to judge the power system according to the electrical analog quantity collected by the node Whether there is a fault, and at the same time judge the current flow direction of this node, wherein the determination result of the current flow direction is from the first data set to the second data set, from the second data set to the first data set or no current flow, the The first data set is used to record the unique ident...

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Abstract

The invention relates to the technical field of relay protection of power systems and discloses an intelligent network type power protection method and protection device, wherein a novel power protection algorithm combining relay protection basic hardware and a communication technology is provided: according to the corresponding electrical simulation quantity collected by nodes, whether a power network system breaks down or not is judged qualitatively, and the requirement for protection sensitivity is met; according to the node sets and the current direction of an upper node set and a lower node set, the fault position is judged through a specific network type logic algorithm, and protection selectivity is realized, so that the objective of qualitative judgement and network type logic judgement is realized, full network speed can be realized without strict constant value setting, and the problems of difficulty in cooperation, difficulty in constant value setting and long fault removaltime existing in the existing power network system are solved.

Description

technical field [0001] The invention belongs to the technical field of electric power system relay protection, and in particular relates to an intelligent network type electric power protection method and a protection device. Background technique [0002] Current power system relay protection devices generally adopt ladder-type protection schemes, such as current protection and distance protection. These protection methods can generally be divided into multiple sections. For example, for current protection, it can be divided into four sections. The first The second section is 120% of the whole line, a short delay; and so on, in terms of protection setting and time, the cooperation between protection levels at all levels is realized, so as to realize Requirements for reliability, safety and selectivity of relay protection. The same is true for distance protection, setting multiple stages and multiple time limits to meet the requirements of reliability, safety and selectivity...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/28
CPCH02H7/261H02H7/28
Inventor 张照滟张学圈
Owner 张学圈