Power distribution network lightning fault rapid positioning method based on lightning imager
A technology of lightning fault and positioning method, which is applied in the direction of fault location, fault detection according to conductor type, instrument, etc., can solve problems such as lightning and ground flash that are difficult to accurately find out tripping, so as to reduce the comparison workload and shorten the comparison time Effect
Active Publication Date: 2021-08-13
CHINA AGRI UNIV
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Problems solved by technology
[0003] my country's current lightning location system can meet the basic requirements for lightning monitoring of high-voltage transmission network, but the overhead line span of distribution network is usually smaller than the monitoring accuracy of wide-area lightning-to-ground lightning, so it is difficult for the ground detection station in the traditional lightning location system to accurately find out lightning flash
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Embodiment
[0057] In order to verify the feasibility of the distribution network lightning fault location method based on the lightning imager of the present invention, it is verified based on the rural distribution network in a certain place in the south and combined with the data provided by the local power supply bureau.
[0058] Step S1: According to the distribution automation information of a power supply company in a certain place, at 16:04:27 on December 18, 2020, the head-end circuit breaker of 10kV Xiangbao Line 111# tripped.
[0059] Step S2: Select the positioning accuracy of the lightning imager d=0.5km, and download the distribution network area through the official website of the National Meteorological Satellite Center (http: / / www.nsmc.org.cn / ) December 18, 2020 at 15:59: Lightning data collected by the lightning imager FY-4A LMI from 00 to 16:09:59. It can be seen from Table 1 that 109°1100'E and 23°9500'N are the lightning events that lead to tripping (the occurrence ti...
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The invention relates to a power distribution network lightning fault rapid positioning method based on a lightning imager, and the method comprises the following steps: S1, obtaining the tripping information of a circuit breaker at the head end of a power distribution network line after a lightning fault occurs in a power distribution network; S2, obtaining thunder and lightning data corresponding to the tripping time, and when the lightning data are downloaded, selecting the positioning precision d of the lightning data, wherein the positioning precision d is the resolution of the lightning imager; S3, analyzing and calculating the thunder and lightning data, and determining occurrence time and latitude and longitude coordinates of thunder and lightning events in the power distribution network area; S4, determining a tower coordinate screening range in the tripping line according to the latitude and longitude coordinates of the lightning event; S5, obtaining the coordinates of each tower in the tripping line of the power distribution network from the database of the power supply department, and determining the tower coordinates in the tower coordinate screening range; and S6, calculating the distance between each tower coordinate in the tower coordinate screening range and the latitude and longitude coordinates of the lightning event in the power distribution network area.
Description
technical field [0001] The invention belongs to the technical field of rapid location of lightning faults in distribution networks, and in particular relates to a method for quickly locating lightning faults in distribution networks based on a lightning imager. Background technique [0002] Lightning is a common natural phenomenon accompanied by lightning and thunder, and it is also one of the main factors that seriously affect the normal and safe operation of distribution networks. In most distribution networks in my country, the number of overhead line faults caused by lightning strikes accounts for 50% to 60% of the total number of overhead line faults, and some distribution networks even reach 70% to 80%. [0003] my country's current lightning location system can meet the basic requirements for lightning monitoring of high-voltage transmission network, but the overhead line span of distribution network is usually smaller than the monitoring accuracy of wide-area lightni...
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IPC IPC(8): G01R31/08G06F16/2457G06F16/2458G06F16/29G06Q50/06
CPCG01R31/086G01R31/088G06F16/2457G06F16/2477G06F16/29G06Q50/06Y04S10/52
Inventor 杨建华杨志杰张涛薛文景李嘉彬
Owner CHINA AGRI UNIV