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In this paper the lifetime of the power semiconductors in the rotor side converter of a wind turbine with Doubly Fed Induction Generator (DFIG) concerning their power cycle capability is examined. Based on the offshore wind velocity data of one year (FINO station), the corresponding temperature cycles of the power semiconductors in the converter are simulated for a 2 MW DFIG. The simulation is based...
This paper deals with a method to derive the junction temperature of an IGBT while the device is in operation. In order to achieve this the gate-emitter voltage, the collector current and the collector-emitter voltage are digitized on the driver board. Due to the fact that material parameters vary with temperature, the waveforms of the switching transients vary with temperature, too. Thus, there is...
Gate units of todaypsilas converters are in most cases voltage sources charging the input capacitance with a fixed gate resistor. In some publications, fixed current sources are implemented to support the charging process with a supplementary gate current. These solutions are implemented in an analog way and are designed and respectively optimized for fixed parameters and devices. During operation,...
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