Upgrading and Application of ABB Inverter IGBT+AGDR
In the long-term operation and maintenance of wind turbines,it has been found that the IGBT modules of ABB frequency converters in wind turbines are usually burnt out,exploded,and other faults during operation.The main reason is compact internal structure and inconvenient heat dissipation of ABB frequency converters.The AGDR drive board is directly welded to the IGBT,which generates significant heat during operation.The components on the AGDR drive board are excessively heated,resulting in a decrease in operational stability.At the same time,the components used in the AGDR board itself also generate a certain amount of heat,which is welded together with the IGBT,greatly reducing the heat dissipation performance.Long term operation can easily cause instability in chopping signal and driving signal,causing overvoltage and overcurrent problems in the IGBT,and ultimately causing malfunctions.In order to improve operational stability,heat dissipation performance and safety,reduce failure rate,and ensure safe operation of wind turbines,a set of ABB inverter IGBT+AGDR upgrade and transformation plan has been proposed.
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