Converter of fan, and junction temperature monitoring method and device of IGBT module

A converter and junction temperature technology, which is applied in the junction temperature monitoring of IGBT modules and the field of converters, can solve the problems of reduced accuracy of junction temperature monitoring results, large deviation between junction temperature value and actual junction temperature value, etc.

Active Publication Date: 2019-04-23
BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
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Problems solved by technology

[0004] However, since the junction temperature-case temperature fitting curve is related to multiple operating parameters such as water cooling liquid temperature, switching frequency, output current frequency, modulation ratio and bus voltage of the power component, when one of the operating parameters changes, the junction temperature- The case temperature fitting c...

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  • Converter of fan, and junction temperature monitoring method and device of IGBT module
  • Converter of fan, and junction temperature monitoring method and device of IGBT module
  • Converter of fan, and junction temperature monitoring method and device of IGBT module

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Embodiment Construction

[0073] Features and exemplary embodiments of various aspects of the invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention.

[0074] The embodiment of the present invention provides a method and device for monitoring the junction temperature of the converter of the fan and the IGBT module, which can monitor the junction temperature of the IGBT module during the operation of the IGBT module as the switching frequency, modulation ratio and power factor change. Corresponding to the parameter data, the precise calculation and real-time display of the junction temperature of the IGBT module can be realized. In addition, by increasing the junction temperature protection threshold of the IGBT module to 140°C, the rated operating current of the IGBT module can be greatly increased, thereby improving the current utilization rate of the IGBT module. ...

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Abstract

The invention provides a converter of a fan, and a junction temperature monitoring method and device of an IGBT module. The junction temperature monitoring method of the IGBT module comprises the steps: a forward peak current of the IGBT module, the power factor of the IGBT module, the modulation ratio of the IGBT module, the switching frequency of the IGBT module, and an estimated value of the current junction temperature of the IGBT module are obtained; the conduction loss of the IGBT module and the switching loss of the IGBT module are calculated according to the forward peak current of theIGBT module, the power factor of the IGBT module, the modulation ratio of the IGBT module, the switching frequency of the IGBT module, and the estimated value of the current junction temperature of the IGBT module; and the junction temperature of the IGBT module is calculated according to the conduction loss of the IGBT module, the switching loss of the IGBT module and the shell temperature of the IGBT module. By adopting the technical scheme, the accuracy degree of a junction temperature monitoring result can be increased.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a converter of a wind turbine and a junction temperature monitoring method and device of an IGBT module. Background technique [0002] The IGBT module is the core device in the power component of the converter of the wind power generating set (hereinafter referred to as the wind turbine), which can rectify and invert the three-phase alternating current output by the wind turbine through high-frequency switching. As the speed of the fan increases, the amplitude and frequency of the AC side current of the power component gradually increase, which causes the junction temperature of the IGBT module to rise rapidly. When the junction temperature of the IGBT module is too high, it will cause damage to the IGBT module. Therefore, when the power component is working, it is necessary to monitor the junction temperature of the IGBT module in real time to implement over-temper...

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Application Information

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IPC IPC(8): G01R31/26
CPCG01R31/2619
Inventor 刘佳
Owner BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
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