Annular power distribution network relay protection device capable of distinguishing direction automatically and control method

A relay protection device and direction discrimination technology, which is applied in the direction of emergency protection circuit devices, electrical components, etc., can solve the problems of unsuitable ring network bilateral current protection, etc., and achieve safe and stable operation, short time consumption, and offset delay. Effect

Active Publication Date: 2019-10-11
STATE GRID ZHEJIANG ELECTRIC POWER CO LTD JINHUA POWER SUPPLY CO +2
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  • Description
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  • 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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  • Annular power distribution network relay protection device capable of distinguishing direction automatically and control method
  • Annular power distribution network relay protection device capable of distinguishing direction automatically and control method
  • Annular power distribution network relay protection device capable of distinguishing direction automatically and control method

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Embodiment 1

[0024] A relay protection device for 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 654-...

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Abstract

The invention relates to the technical field of power grid safety, in particular to an annular power distribution network relay protection device capable of distinguishing direction automatically. Theannular power distribution network relay protection device is arranged at each node of a call wire, and comprises a communication module, a clock, an ampere meter, a memory and a controller, whereinthe ampere meter measures the current of the call wire node; a unique serial number and a node sequence relation are stored in the memory; the clock provides a current time stamp; the communication module is in communication connection with a branch ampere meter; the communication module, the clock, the memory and the ampere meter are all connected with the controller; and the controller is connected with the control end of a relay switch. The protection device has the substantial effects that the position of a fault branch can be judged through an action signal, so that the fault branch can be removed in a targeted manner, and the accident enlargement is avoided.

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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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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