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Power distribution network high fault-tolerance on-line fault locating method based on fault auxiliary factors

A distribution network fault and fault location technology, applied in the field of intelligent distribution network

Inactive Publication Date: 2016-10-26
HENAN INST OF ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] In order to solve the above-mentioned technical problems, based on automatic collection terminals such as FTU, the present invention proposes a highly fault-tolerant online fault location method for distribution network based on fault auxiliary factors, and realizes single or multiple fault high-speed fault detection for distribution network feeder fault sections Fault-tolerant positioning, and at the same time realize the accurate identification of the position of the FTU device with potential defects, can effectively realize the online fault location of large-scale and complex distribution networks, and provide theoretical guidance for the condition-based maintenance of FTU devices

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  • Power distribution network high fault-tolerance on-line fault locating method based on fault auxiliary factors
  • Power distribution network high fault-tolerance on-line fault locating method based on fault auxiliary factors
  • Power distribution network high fault-tolerance on-line fault locating method based on fault auxiliary factors

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Embodiment Construction

[0044] The content of the invention will be further described below in conjunction with the accompanying drawings and examples.

[0045] Such as figure 1 , figure 2 and image 3 As shown, when the distribution network line is faulty, a high fault-tolerant online fault location method for distribution network based on the fault auxiliary factor of the present invention can be adopted, and the steps are as follows:

[0046] Step 1: Based on the time synchronization device, with 15 minutes as the control cycle, use the current monitoring device to dynamically monitor the current at the monitoring point of the distribution network, and compare it with the set normal current reference value to determine whether there is a fault overcurrent. When the fault is overcurrent, each independent comparator outputs an alarm value of 1, otherwise the output value is 0, and the fault overcurrent exceeding the limit value of all monitoring points is collected by the control master station t...

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Abstract

The invention discloses a power distribution network high fault-tolerance on-line fault locating method based on fault auxiliary factors, comprising the steps of: utilizing a main station to collect the current spillage information of each feeder line switch of a power distribution network; setting a switch function set; building a power distribution network fault locating non-linear complementation optimization fault locating model; building a non-linear programming fault locating model meeting KKT extremum conditions; and utilizing a lagrangian multiplier and a continuous space non-linear optimization extremum theorem to obtain fault auxiliary fault factors, and realizing a fault locating and FTU defect diagnose fault locating non-linear equation set model. The method realizes single or multiple fault high fault-tolerance location on a power distribution network feeder line fault section, realizes latent defect FTU apparatus position accurate identification and large scale complex power distribution network on-line fault positioning, provides theoretical guidance for FTU apparatus state maintenance, and has the advantages of convenient implementation, high reliability, strong fault tolerance capability, high fault locating efficiency, great adaptability to multiple faults, etc.

Description

technical field [0001] The present invention relates to the technical field of intelligent distribution network, and more specifically, relates to a high-fault-tolerant online fault location method of distribution network based on fault auxiliary factors, which realizes single or multiple fault location for feeder fault sections of distribution network , Accurate identification of the location of the potentially defective FTU device. Background technique [0002] In the process of power transmission and distribution, the distribution network is an important link between the power system and users. With the rapid development of the economy, users' requirements for power supply reliability and power supply quality continue to increase. Distribution network fault location is a prerequisite for accurate identification of feeder fault areas and restoration of user power supply, and quickly and accurately find faults in distribution network feeders. The location plays an importan...

Claims

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Application Information

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IPC IPC(8): G01R31/08
CPCG01R31/086G01R31/088
Inventor 郭壮志陈涛周成虎张秋慧薛鹏詹自熬徐其兴肖海红
Owner HENAN INST OF ENG
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