Method for positioning temporary voltage drop source on line by adopting fuzzy similarity match

A technology of fuzzy similarity and voltage sag source, applied in resources, data processing applications, instruments, etc., can solve the problems of inability to judge, misjudgment, and low accuracy of engineering positioning, and achieve rich data sources, accuracy and universality. Highly adaptable effect

Active Publication Date: 2015-04-22
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In summary, when there is missing or wrong node information, there will be misjudgment or no judgment, and the accuracy of its engineering positioning is relatively low (<85%)
[0005] It can be seen from the above that the layout limitation...

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  • Method for positioning temporary voltage drop source on line by adopting fuzzy similarity match
  • Method for positioning temporary voltage drop source on line by adopting fuzzy similarity match
  • Method for positioning temporary voltage drop source on line by adopting fuzzy similarity match

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Embodiment Construction

[0026] In order to make the above-mentioned objectives, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] In the following description, specific details are set forth in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0028] This method uses multiple monitoring information data to locate the sag source. Based on the functional relationship between the network node voltage and the location of the sag source, a new idea of ​​locating the voltage sag source is proposed, and its fuzzy is calcul...

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Abstract

The invention relates to a method for positioning a temporary voltage drop source on line by adopting fuzzy similarity match. The method is characterized by comprising the following steps: establishing a node positive sequence voltage match index calculation model by taking the positive sequence voltage of existing nodes of the whole network as a characteristic quantity, and positioning the temporary voltage drop source by utilizing the fuzzy similarity of voltage match indexes and the match index similarity of monitored voltage vectors. The method disclosed by the invention can be used for accurately positioning the temporary voltage drop source by utilizing existing limited monitoring point information. The method disclosed by the invention can be used for calculating the voltage match index of the positive sequence voltage of a node during temporary voltage drop and matching and identifying by utilizing fuzzy correlation degree and a line fault characteristic set established off line, thereby being insensitive to data accuracy. Besides, the method disclosed by the invention can be used for integrally judging and identifying the temporary voltage drop source by simultaneously adopting the information of all monitoring nodes and the information of a network topology, is rich in data source and has certain fault tolerance, and thus high accuracy and universality are achieved in positioning the temporary voltage drop source by utilizing the method.

Description

Technical field [0001] The invention relates to an online positioning method for a voltage sag source using fuzzy similarity matching. Background technique [0002] Voltage sag is one of the power quality problems with a higher occurrence rate and serious losses among many power quality problems. Accurately locating the source of voltage sag is helpful for grid fault location, power quality diagnosis, and formulation of mitigation measures. It is also conducive to distinguishing sag responsibility and coordinating and alleviating disputes. At present, the power quality monitoring devices that have been widely used generally have real-time detection functions, and can perform statistical analysis on the number and amplitude of voltage sags of the monitoring nodes, and engineering applications for sag positioning have not yet been realized. [0003] Distinguish the responsibilities of sags. The fault location of the power grid must be based on accurate voltage sag location. Therefor...

Claims

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Application Information

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IPC IPC(8): G06Q50/06G06Q10/06
CPCG06Q10/06395G06Q50/06
Inventor 张嫣邵振国潘进贤王树洪吴瑾樱翁桂萍
Owner FUZHOU UNIV
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