Power distribution network fault diagnosis method based on dynamic set coverage
A distribution network fault and dynamic aggregation technology, which is applied to the fault location, detects faults according to conductor types, and measures electricity, can solve problems such as accuracy impact
Active Publication Date: 2021-02-26
STATE GRID FUJIAN ELECTRIC POWER CO LTD +1
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However, the accuracy of this type of method will be affected by the topology of the distribution network.
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[0048] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0049] It should be pointed out that the following detailed description is exemplary and is intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
[0050] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combina...
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The invention relates to a power distribution network fault diagnosis method based on dynamic set coverage. The power distribution network fault diagnosis method comprises the following steps: uniformly numbering nodes and power supply lines of a power distribution network fault section, and introducing a reachable matrix to model the connectivity among the nodes; constructing a fault current information fault section correlation matrix corresponding to the reachable matrix, and establishing a dynamic set coverage model; solving the dynamic set coverage model by using Viterbi decoding to obtain a working state change sequence of each line section in the power distribution network; and judging whether the line section state set of the power distribution network on a set time period can cover all fault current information or not according to the working state change sequence to obtain a section set of the fault line. According to the invention, the faulty line section set can be predicted according to the fault current information set reported by the FTU equipment in each time period, and a plurality of faulty line sections can be accurately positioned at the same time.
Description
technical field [0001] The invention relates to the technical field of distribution network fault diagnosis, in particular to a distribution network fault diagnosis method based on dynamic collective coverage. Background technique [0002] As the terminal basic link in the power network that directly supplies power to users, the working status of the distribution network will directly affect the power quality and experience of power users. With the rapid development of the national economy, the current power users' requirements for power supply reliability are getting higher and higher. Therefore, when a fault occurs in the distribution network, accurate and fast fault location is the key to ensure the reliability of power supply and reduce the duration of power outages for power users. one of the important means. [0003] In order to achieve precise location of distribution network faults, most current research is based on fault diagnosis methods that combine steady-state ...
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CPCG01R31/086G01R31/088
Inventor 郭敬东夏炳森唐元春占彤平陈世春吴飞罗富财林文钦周钊正张章煌陈力陈卓琳李翠
Owner STATE GRID FUJIAN ELECTRIC POWER CO LTD