Method and device for monitoring thermal resistance of cold plate

Abstract

The present invention provides a method and device for monitoring thermal resistance of a cold plate, wherein the method includes: obtaining the surface temperature of the cold plate, the cooling liquid outlet temperature of the cold plate, and the heat dissipation power of the cold plate when it is determined that the cold plate enters thermal equilibrium; Determine the real-time thermal resistance of the cold plate according to the surface temperature of the cold plate, the outlet temperature of the cooling liquid of the cold plate, and the heat dissipation power of the cold plate; determine whether the difference between the real-time thermal resistance of the cold plate and the preset thermal resistance threshold is greater than A preset difference; if it is greater than the preset difference, it is determined that the cold plate is overheated. In this way, the thermal resistance of the cold plate can be monitored in real time to determine when the cold plate is overheated, so that an alarm will be issued when the thermal resistance reaches the boundary of reporting a fault and the device is about to overheat, which further enables technicians to maintain and clean the cold plate. In order to prevent the report of the over-temperature fault of the cold plate, ensure the safe operation of the power devices that need to be dissipated on the cold plate, and then ensure the normal operation of the wind power generating set.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a method and device for monitoring thermal resistance of a cold plate. Background technique [0002] Wind turbines are an important tool for collecting wind energy and converting wind energy into electrical energy. The devices in the wind power generating set, such as the insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, IGBT for short) of the converter, etc., need to dissipate heat. [0003] In the prior art, the method of water cooling and heat dissipation is adopted, and the power device that needs to be dissipated is attached to the cold plate with thermal conductive silicone grease, and the device conducts heat to the cold plate, and then the inside of the cold plate passes the water circulation to the surface of the cold plate. The heat conducted by the device is taken away, so that the temperature of the device that needs to be dissipated...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a thermal resistance monitoring method and device of a cold plate, which is used to solve the problem that when the thermal resistance increases to a certain value in the prior art, the surface temperature of the cold plate will rise, thereby causing the surface temperature of the cold plate to exceed the standard. Further cause the temperature of the device close to the surface of the cold plate to exceed the standard, thereby affecting the safe operation of the device that needs to be cooled, and affecting the normal operation of the wind turbine

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