Thermal resistance monitoring method and device of cold plate

Abstract

The invention provides a thermal resistance monitoring method and device of a cold plate. The method comprises: when a cold plate is determined to enter a thermal balance state and a surface temperature, a cooling liquid outlet temperature, and a heat dissipation power of the cold plate are obtained; according to the surface temperature, the cooling liquid outlet temperature, and the heat dissipation power of the cold plate, the real-time thermal resistance of the cold plate is determined; whether a difference between the real-time thermal resistance of the cold plate and a preset thermal resistance threshold is larger than a preset difference value is determined; and if so, the cold plate is determined to be in an over-heating state. Therefore, the thermal resistance of the cold plate ismonitored in real time to determine when the cold plate enters an over-heating state, so that alarming is carried out when the thermal resistance reaches a boundary of alarm reporting and the overheating state of the device is going to be caused; and thus the technical staff can repair and clean the cold plate timely to prevent reporting of the over-heating fault of the cold plate, so that the power device needing heat dissipation on the cold plate works safely to ensure normal operation of the wind 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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