A simulation method for temperature rise of ground wire-clamp assembly under lightning strike
A simulation method and component model technology, applied in special data processing applications, design optimization/simulation, calculation, etc., can solve problems such as not being fully applicable to wire clamps, unable to study temperature fields, and unable to obtain temperature changes of wire clamps, etc.
Active Publication Date: 2022-01-25
ZHONGSHAN POWER SUPPLY BUREAU OF GUANGDONG POWER GRID
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Problems solved by technology
[0005] In view of this, the present invention aims to solve the problem that the existing research methods on the lightning strike temperature rise of the line may not be able to realize the research on the change of the temperature field with time, the temperature change inside the clamp cannot be obtained, and there are large time and space limitations. and the problem that it cannot be fully applied to the simulation of the temperature rise of the wire clamp under the action of lightning
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[0041] In order to make the purpose, features and advantages of the present invention more obvious and understandable, 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 following description The embodiments are only some of the embodiments of the present invention, but not all of them. 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.
[0042] According to the existing research, after the lightning strikes the overhead ground wire, the lightning current will flow through the ground wire through the connection fitting (namely the clamp), which will easily lead to discharge at the contact point between the ground wire and the clamp. The discharge at the...
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The invention provides a method for simulating the temperature rise of a ground wire-clamp assembly under the action of lightning, and belongs to the technical field of transmission line maintenance. The steps of the method include: constructing a lightning current model including A component and C component and a heat source model following a Gaussian distribution, constructing a ground wire-suspension clamp assembly model, adding an elliptical conductive bridge model to the model, and then according to the lightning current model Excite the ground wire-suspension clamp assembly model with the heat source model, use numerical methods to calculate the temperature change process and temperature distribution, and judge whether the temperature rise occurs at the adiabatic boundary, if so, stop the calculation, and consider the temperature rise simulation to be completed. The invention solves the problem that the existing research method on the lightning strike temperature rise of the line cannot be completely applied to the simulation of the temperature rise of the wire clamp under the lightning strike.
Description
technical field [0001] The invention belongs to the technical field of power transmission line maintenance, and in particular relates to a method for simulating the temperature rise of a ground wire-clamp assembly under lightning strikes. Background technique [0002] In the actual operation of power lines, reasons such as loose bolts at the connection between the ground wire and the clamp, dirty contact surfaces, and electrochemical corrosion of copper and aluminum will cause the resistance to increase. Overhead line breaks. Faults caused by lightning strikes and broken strands often cannot be self-recovered, requiring a lot of manpower and material resources for emergency repairs, which will have a great impact on power grid operation and social production. The current main detection method is to conduct infrared temperature measurement on the line regularly by the operating personnel according to the operation and maintenance strategy. The temperature measurement cycle ...
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IPC IPC(8): G06F30/23G06F119/08
CPCG06F30/23G06F2119/08
Inventor 李红发陈清江程绍兵熊振东戴征献王干军王金城王荣鹏董志聪聂文翔罗应文高松吴毅江李新海杨晓勇陈伟郭栩文夏敏黄哲林龙凤陈佳健林洪栋段海城何健强邓晓阳王灵坤董银龙郭宗鑫黄建明陈宏豪吴添龙谭杨宝齐国良丘思华戴泽雄胡小慢余文邦黄文彬吴章洪张志方邓小龙陈嘉亮熊春雷
Owner ZHONGSHAN POWER SUPPLY BUREAU OF GUANGDONG POWER GRID