Self-adaptive power distribution network fault positioning method based on fault current path

A distribution network fault and fault current technology, which is applied in the direction of fault location, fault detection according to conductor type, complex mathematical operations, etc., can solve problems such as difficult to adapt to operating topology changes, complex switching function construction, etc.

Active Publication Date: 2020-08-18
CHINA UNIV OF MINING & TECH (BEIJING)
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Problems solved by technology

[0010] The purpose of the present invention is to propose an adaptive distribution network fault location method based on the fault current path, aiming at the problems of complex switch function construction and difficulty in adapting to the operation topology change existing in the existing indirect fault location method of distribution network

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  • Self-adaptive power distribution network fault positioning method based on fault current path
  • Self-adaptive power distribution network fault positioning method based on fault current path
  • Self-adaptive power distribution network fault positioning method based on fault current path

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Embodiment Construction

[0130] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. An application scenario of the present invention is shown in the accompanying drawings. However, the trial scope of the present invention is not limited to the application scenarios given herein. The purpose of proposing this application scenario is to facilitate description and to make the disclosure of the present invention more thorough and comprehensive.

[0131] figure 1 It is a flow chart of the steps of the method of the present invention, comprising the following steps:

[0132] Step 101: Encoding the feeder section, FTU, and power supply in the distribution network to construct a network description matrix D;

[0133] Step 102: Update the connection relationship in the network description matrix D according to the actual operating topology of the current distribution network;

[0134] Step 103: According to the network description ma...

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Abstract

A self-adaptive power distribution network fault positioning method based on a fault current path comprises the following steps: encoding a feeder line section, an FTU and a power supply in a power distribution network, and constructing a network description matrix D; updating the connection relationship in the network description matrix D according to the actual operation topological structure ofthe current power distribution network; generating a power distribution network adaptive switching function according to the network description matrix D; when the power distribution network fails, reading current out-of-limit information uploaded by all FTUs in the power distribution network, and generating a current out-of-limit information matrix I; and establishing a fault positioning model of the power distribution network, solving the fault positioning model of the power distribution network based on an intelligent optimization algorithm, and finally determining a fault position. The method can be universally used for a traditional power distribution network and a power distribution network with distributed power supply access, rapid and reliable positioning of a single fault and aplurality of faults in the power distribution network can be realized, and switching of the operation state of the power distribution network does not influence the method provided by the invention.

Description

technical field [0001] The invention relates to the field of distribution network protection, in particular to an adaptive distribution network fault location method based on a fault current path. Background technique [0002] According to statistics, more than 80% of the faults in the power system come from the distribution network, which requires the distribution network to be able to quickly analyze, locate and isolate the fault after the fault occurs. With the rapid development of distributed power generation technology, more and more distributed power sources are connected to the distribution network, which brings great challenges to the safe and stable operation of the distribution network. The access of distributed power sources has changed the network operation topology of the original distribution network, making the original distribution network change from a traditional distribution network with a single power source to an active distribution network with multiple...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08G06F17/16G06N3/00
CPCG01R31/086G06N3/006G06F17/16Y04S10/52
Inventor 李一锦魏旭腾林建华牛耕
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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