Overvoltage deduction prediction method and device based on voltage waveform attenuation
A technology of voltage waveform and prediction method, applied in the direction of measurement device, measurement of current/voltage, measurement of electricity, etc., can solve problems such as affecting the normal operation of transmission lines
Inactive Publication Date: 2019-12-13
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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[0003] The transmission line is a very important part of the power system, and it is also the part directly connected to the power user. The operation status of the transmission line is directly related to the user experience. In fact, since the transmission line is usually located outdoors, the power transmission line Lines are affected by many factors, and some faults often occur that affect the normal operation of transmission lines
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[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0040] see figure 1 , the first aspect of the embodiment of the present application shows an overvoltage deduction prediction method based on voltage waveform attenuation, the method comprising:
[0041]S101 measures the line voltage values of different line monitoring points on both sides of the fault point;
[0042] S102 Calculate the line voltage attenuation coefficient according to the line voltage value and the distance between the corresponding monitori...
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The embodiment of the invention discloses an overvoltage deduction prediction method and a device based on voltage waveform attenuation. The method comprises following steps: measuring the line voltage values of any two points at the two sides of a lightning stroke fault point, and calculating the overvoltage data of the lightning stroke fault point based on the voltage attenuation rule of a powertransmission line; when the power transmission line is subjected to lightning stroke, large overvoltage is generated at a lightning stroke fault point, and the overvoltage traveling wave will attenuate and propagate to the two sides of the line according to a certain attenuation coefficient, the voltage attenuation coefficient of the line is calculated by measuring the voltage at different positions of the line, and overvoltage data of the lightning stroke point are calculated, therefore, the overvoltage data of the lightning stroke fault point of the line can be quickly determined, and corresponding reference bases are provided for lightning protection level of the power transmission line and installation of lightning arrester parameters of corresponding levels at different positions.
Description
[0001] This application claims the priority of the Chinese patent application with application number 201811311684.1 submitted to the State Intellectual Property Office on November 06, 2018. The entire contents of which are incorporated by reference in this application. technical field [0002] The invention belongs to the technical field of lightning overvoltage monitoring of high-voltage transmission lines, and in particular relates to an overvoltage deduction prediction method and device based on voltage waveform attenuation. Background technique [0003] The transmission line is a very important part of the power system, and it is also the part directly connected to the power user. The operation status of the transmission line is directly related to the user experience. In fact, since the transmission line is usually located outdoors, the power transmission line Lines are affected by many factors, and some faults often occur that affect the normal operation of transmissi...
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IPC IPC(8): G01R31/08G01R19/165
CPCG01R19/165G01R31/088
Inventor 刘红文于广辉王科赵现平聂鼎
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST