A health evaluation method of wind power converter igbt power module heat dissipation system

Abstract

The invention provides a method for evaluating the health of the heat dissipation system of a wind power converter IGBT power module, comprising the following steps: extracting real-time operating data of a wind power generating set, selecting physical characteristic variables and performing preprocessing to obtain the real-time temperature of the IGBT power module of the converter , real-time grid A-phase current, B-phase current, C-phase current, engine room temperature; compare the real-time converter IGBT power module temperature with the converter IGBT power module cooling system start-up temperature: establish a thermal resistance threshold function, according to the thermal resistance threshold function Calculate the theoretical thermal resistance of the parameters; calculate the thermal resistance residual based on the real-time thermal resistance and the theoretical thermal resistance; calculate the degradation degree of the heat dissipation system of the converter IGBT power module according to the thermal resistance residual, and adjust the cooling system of the converter IGBT power module according to the degradation degree health assessment. The invention can give an early warning when the health degree of the heat dissipation system of the IGBT power module of the wind power converter is degraded.

Description

technical field [0001] The invention relates to the technical field of wind power generating sets, in particular to a method for evaluating the health of a heat dissipation system of a wind power converter IGBT power module. Background technique [0002] At present, multiple IGBT (insulated gate bipolar transistor) power modules are usually used in the converter of the wind turbine. The IGBT power module is composed of BJT (bipolar transistor) and MOS (insulated gate field effect transistor). ) composed of a composite fully-controlled voltage-driven power semiconductor device, the power device will generate a lot of heat during the working process, causing the temperature of the IGBT power module of the converter to rise gradually with the prolongation of the working time. When its temperature exceeds the rated operating temperature, it will malfunction. [0003] In the prior art, the converter IGBT power module is equipped with a supporting heat dissipation system for heat...

AI Technical Summary

Problems solved by technology

[0004] However, the defect of the above-mentioned technical solution is that the temperature of the IGBT power module of the converter reaches the fault threshold, or a fault occurs after the heat dissipation system deteriorates

cause downtime

The solutions in the prior art cannot detect the deterioration of the heat dissipation system of the converter IGBT power module in advance. After a failure, it is necessary to manually check on the computer to determine whether the converter IGBT module is damaged or its heat dissipation system is deteriorated, causing the monitored temperature to reach the fault threshold; this This kind of shutdown troubleshooting method lacks early warning methods for the deterioration of the health of the cooling system, which not only reduces the power generation of wind turbines, but also increases the difficulty of operation and maintenance for maintenance personnel.

Images