Transmission line icing predication method based on multi-element physical quantity mathematical model

Abstract

The invention provides a transmission line icing predication method based on a multi-element physical quantity mathematical model. The transmission line icing predication method comprises the following steps of: (1) acquiring meteorological parameters including temperature, humidity and wind power at the moment; (2) respectively judging whether the meteorological data at the moment meets the icing conditions that the temperature is within -8-0 DEG C, the humidity is above 90% RH and the wind speed is 2-7m / s, if yes, executing the step (3), and if not, entering the next sampling period, namely, returning to the step (1); (3) comparing data values obtained by a tension sensor with the initial values, if icing is proved to occur on a wire, executing the step (4), otherwise, returning to the step (1); (4) acquiring current ambient pressure through a ground terminal, and calculating the icing thickness b; (5) calculating comprehensive specific gravity of a wire ti at any moment through the parameters including the icing thickness, the temperature, the humidity and the like; and (6) acquiring axial stress Sigma x at the span terminal through the comprehensive specific gravity, calculating the fracture remaining time t, and sending out early warning through the terminal, wherein Sigma x=Sigma max. The transmission line icing predication method realizes effective monitoring and good accuracy.

Description

technical field [0001] The invention relates to the realization of a transmission line icing prediction method for issuing early warning by modeling the influence of multiple physical quantities (wind force, temperature, humidity, raindrops, air pressure, etc.) on power line icing. Background technique [0002] In 2008, the southern part of my country was hit by a snow disaster, and the transmission lines were generally covered with ice. In severe cases, the transmission lines were broken. Since the power company could not judge where the line was seriously covered with ice and when it would break, it was unable to implement preventive measures such as deicing in time. Therefore, it is impossible to effectively avoid the disconnection of the line, the collapse of the tower, etc., which is a common problem in the current power line system. [0003] Icing of transmission lines is one of the most important disasters in the power system. In order to conduct in-depth research in t...

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Problems solved by technology

[0005] In order to solve the current power line icing situation that cannot be monitored in time, so that the situation of disconnection and tower collapse cannot be effectively avoided, the present invention designs a mathematical model based on multiple physical quantities to mathematically model the icing thickness of the transmission line so as to effectively predict the icing situation of the transmission line. The model provides an icing prediction method for transmission lines based on a multivariate physical quantity mathematical model that can achieve effective monitoring, good accuracy, and effectively avoid disconnection and tower collapse.

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