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A relay protection device and control method for ring distribution network with automatic direction discrimination

A relay protection device and direction discrimination technology, applied in emergency protection circuit devices, electrical components, etc., can solve the problem of inapplicable double-sided current protection of the ring network, and achieve safe and stable operation, short time consumption, and offset delay. Effect

Active Publication Date: 2022-04-19
STATE GRID ZHEJIANG ELECTRIC POWER CO LTD JINHUA POWER SUPPLY CO +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it is not suitable for double-sided current protection of the ring network

Method used

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  • A relay protection device and control method for ring distribution network with automatic direction discrimination
  • A relay protection device and control method for ring distribution network with automatic direction discrimination
  • A relay protection device and control method for ring distribution network with automatic direction discrimination

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Embodiment 1

[0024] A relay protection device for a ring distribution network with automatic direction discrimination. The ring distribution network includes at least two power supply buses and a tie line. The tie line is divided into several sections, and node relay switches are installed at the nodes of the sections. Such as figure 2As shown, node 563, node 563-1, node 563-2, node 001, node 654-2, node 654-1 and node 654 divide the connecting line connecting bus A and bus B into four sections, among which node 563 And the node 654 is a bus outlet switch, each section is connected to a power supply branch, and the power supply branch is divided into several branches, and the flow on the branch is unidirectional, and its relay protection scheme can be implemented with reference to this embodiment. A branch ammeter 100 with communication function is installed at the junction of the power supply branch and the tie line, and the node 563, node 563-1, node 563-2, node 001, node 654-2, node 65...

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Abstract

The invention relates to the technical field of power grid security, in particular to a relay protection device for a ring-shaped distribution network with automatic direction discrimination, deployed at each node of the tie line, including a communication module, a clock, an ammeter, a memory and a controller, and the ammeter measures The current of the tie line node, the unique number and the sequence relationship of the nodes are stored in the memory, the clock provides the current time stamp, the communication module communicates with the branch ammeter, the communication module, the clock, the memory and the ammeter are all connected to the controller, and the controller and The control terminal connection of the relay switch. The substantive effect of the present invention is that the position of the faulty branch can be judged through the action signal, so as to remove it in a targeted manner and avoid the expansion of the accident.

Description

technical field [0001] The invention relates to the technical field of power grid security, in particular to a relay protection device and control method for a ring distribution network with automatic direction discrimination. Background technique [0002] The traditional upper and lower level distribution network protection mainly relies on the setting method to realize the selectivity of the upper and lower level protection actions. If the level difference is too small, it is easy to cause leapfrog action and expand the scope of power outages, which cannot meet the requirements of distribution network automation for power supply reliability; if a reliable level difference is maintained, a large impact load will appear in the lower-level area, which may also bring lower-level damage. Protection malfunction, resulting in lower reliability of distribution network power supply. Therefore, it is necessary to use a technical means to realize that the protection can reliably sen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/26H02H7/28
CPCH02H7/261H02H7/262H02H7/263H02H7/28
Inventor 杜浩良黄健蒋红亮林军徐峰郑燃李跃辉吴彩玲吴炳超刘栋
Owner STATE GRID ZHEJIANG ELECTRIC POWER CO LTD JINHUA POWER SUPPLY CO
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