A method for measuring local heat transfer coefficient of icicle surface on ice-coated wire

Abstract

The invention discloses a device used for measuring the local heat transfer coefficient of the surface of an ice column of an iced conductor. The device comprises a controller, an environment temperature and humidity acquisition module, a watchdog module, a power module, a communication module, an EEPROM (Electrically Erasable Programmable Read-Only Memory) module and a signal acquisition circuit are separately connected onto the controller, the signal acquisition circuit is connected with a multi-channel temperature sensor, and a plurality of terminals of the multi-channel temperature sensor are connected onto an aluminum wire wound on the surface of the ice column at equal intervals. The invention further discloses a method for measuring the local heat transfer coefficient of the surface of the ice column by using the device. The device and the method for measuring the local heat transfer coefficient of the surface of the ice column of the iced conductor can flexibly, rapidly and accurately measure the heat transfer coefficient of the surface of the ice column.

Description

technical field [0001] The invention belongs to the technical field of insulation testing of electrical equipment, and in particular relates to a measuring device for the local heat transfer coefficient on the surface of an ice-coated wire icicle, and also relates to a method for measuring the heat transfer coefficient by using the device. Background technique [0002] When the ambient temperature is low and the number of droplets impinging on the wire is high, the unfrozen water on the ice-coated surface will drop under the action of gravity and wind, accompanied by the formation of icicles in the process. [0003] The appearance of ice-covered icicles on transmission lines poses a serious threat to the safe and stable operation of the power system, often causing accidents such as conductor galloping, sag drop, short-circuit discharge, broken wires and strands, hardware damage, jumping of uniced conductors at different periods, and tower collapse. It is very easy to cause d...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a measuring device for the local heat transfer coefficient on the surface of an ice-coated wire icicle, which solves the problem that the existing experiments cannot measure the local heat transfer coefficient of the special shape of the icicle

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