High-voltage alternating-current GIL pipe gallery online monitoring and temperature state distinguishing method and system and storage medium thereof

Abstract

The invention discloses a high-voltage alternating-current GIL pipe gallery online monitoring and temperature state distinguishing method. The method comprises the following steps: dividing a high-voltage alternating-current GIL pipe gallery into a plurality of line segments; performing data acquisition and transmission on each line segment; establishing a finite element model, iteratively solvingthe mathematical model by using a multi-physical field coupling calculation method comprising an electromagnetic field, a fluid field and a temperature field, and accurately judging the real-time temperature state of the pipe gallery by comparing the calculated shell temperature with the acquired shell temperature data; and displaying four data signals of SF6 gas state, shell temperature, line thermal expansion deformation and partial discharge of each line segment and a temperature state judgment result in real time, and comprehensively analyzing the real-time state of the GIL pipe gallery.According to the invention, state monitoring of the SF6 gas state, the shell temperature, the line thermal expansion deformation and the partial discharge of the GIL pipe gallery is integrated, so that the high-voltage alternating-current GIL pipe gallery is comprehensively evaluated, the requirements of actual engineering are met, and the accuracy and effectiveness of the high-voltage alternating-current GIL pipe gallery temperature on-line monitoring system are enhanced.

Description

technical field [0001] The invention belongs to the field of smart grid online monitoring, and relates to a wireless network monitoring system that integrates shell temperature monitoring, conductor temperature monitoring and environmental temperature monitoring with intelligent remote monitoring, and specifically relates to an online monitoring system for a high-voltage AC GIL pipe gallery. A temperature state discrimination method, system and storage medium thereof. Background technique [0002] With the development of high-voltage AC construction in China, gas-insulated transmission lines play an irreplaceable role in UHV power transmission, nuclear power, offshore large-scale wind power and other projects, and the study of temperature field and thermal strain characteristics is of great significance to its safe and stable operation . The heat generated by the Joule heat loss of the GIL conductor increases the temperature of the conductor, and at the same time heats up t...

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Problems solved by technology

[0004] Purpose of the invention: In order to solve the problem that the current GIL pipe gallery cannot monitor various signals in real time and judge whether it is in a normal operating state in a timely and accurate manner, a method that can monitor the state of SF6 gas, the temperature of the shell, the thermal expansion and contraction of the line and the local At the same time, the installation distribution points of the infrared temperature measuring probes are designed, and the mathematical model is iteratively solved by using the multi-physics field coupling method by establishing a finite element model, and the temperature parameters include Joule heat loss, heat conduction, heat radiation, The heat convection flow and the calculated temperature of the normal operation of the shell are used as a standard to determine the actual operating status of the GIL pipe gallery, which facilitates the analysis of the temperature state of the GIL pipe gallery and helps to improve the reliability of the GIL pipe gallery operation

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