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Method for improving fault judgment reliability of distributed type feeder automation

A feeder automation and fault judgment technology, applied to electrical components, emergency protection circuit devices, etc., can solve problems such as fault judgment and isolation impact, and achieve the effect of avoiding misjudgment and missed judgment, and quickly isolating faults

Active Publication Date: 2015-01-07
INTEGRATED ELECTRONICS SYST LAB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, various conditions such as switch refusal to close, switch refusal to open, and communication failure in field applications have a great impact on the judgment and isolation of faults

Method used

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  • Method for improving fault judgment reliability of distributed type feeder automation
  • Method for improving fault judgment reliability of distributed type feeder automation
  • Method for improving fault judgment reliability of distributed type feeder automation

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Experimental program
Comparison scheme
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Embodiment Construction

[0015] Utilize the method proposed in the present invention to take the concrete process of distributed feeder automation failure judgment reliability measure as follows:

[0016] (1) Group the switches according to the minimum power distribution area, each switch has at most two adjacent minimum power distribution areas, and put the adjacent switches in each minimum power distribution area into the first adjacent switch group of the switch respectively with the 2nd adjacent switch group.

[0017] (2) When the switch refuses to open, in order to correctly isolate the fault and narrow the scope of fault isolation, the processing principle is: when the switch refuses to open, the faulty switch needs to send the switch rejecting information to two adjacent switch groups. When a switch receives The opening rejection information of the adjacent switch, and when the switch flows through the fault current, the switch opens. If the switch does not experience a fault current, the swit...

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Abstract

The invention discloses a method for improving the fault judgment reliability of distributed type feeder automation, wherein switches are divided into different groups according to minimum distribution regions; each switch is provided with two adjacent minimum distribution regions at most; adjacent switches of each minimum distribution region are divided into a first adjacent switch group and a second adjacent switch group of the switches respectively; a switch has an accurate isolation fault when rejecting to be separated, the fault isolation range is decreased, the fault switch needs to transmit switch separation rejection information to two adjacent switch groups, when one switch receives the separation rejection information of the adjacent switches and a fault current flows through the switch, the gate of the switch is separated; and the switch does not act if no fault current flows through the switch. With the adoption of the method, the influence of special situations such as switch closure rejection, switch separation rejection, communication fault and the like in on-site application to the fault judgment and the isolation is solved, and the reliability in fault judgment is improved.

Description

technical field [0001] The invention relates to the field of distribution network feeder automation, in particular to a method for improving the reliability of fault judgment of distributed feeder automation. Background technique [0002] As an important part of distribution automation (DAS), feeder automation system (FA) has the function of isolating faulty areas and quickly restoring power supply to healthy areas. It is of great significance to reduce the blackout area, shorten the blackout time, and improve the reliability of power supply. Distributed feeder automation system is a method that relies on the mutual cooperation between equipment to isolate faults and restore power to healthy areas. According to the way of fault isolation, it can be divided into switch coordination type feeder automation and "surface protection" type feeder automation. [0003] "Surface protection" type feeder automation is a method that relies on the mutual communication between autom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/26
Inventor 张伟
Owner INTEGRATED ELECTRONICS SYST LAB