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为准确描述高压柔性直流输电技术中绝缘栅双极型晶体管(IGBT)模块中IGBT与二极管的开关暂态、热学特性及其关系,提出了一种考虑热学特性的高压IGBT模块暂态模型。该模型包括IGBT模块暂态模型和热学特性模块,采用机理推导、电气等效等方法,无需提取器件底层参数和求解复杂半导体方程,大大减少了计算量。在PSCAD/EMTDC仿真平台搭建模型测试电路与SABER通用模型,与实验测量结果进行对比分析,以验证模型有效性。结果表明,所提出的模型不仅可以实现电路仿真中IGBT模块的各种运行状态,还可以在小步长下模拟其电压电流尖峰、拖尾电流、Miller平台、二极管反向恢复等开关暂态特性,并考虑了温度损耗等对器件参数的影响。因此,该模型可用于柔性直流输电系统仿真、电磁干扰和损耗分析及控制策略等方面的研究。
In order to accurately describe the switching transients and thermal characteristics of IGBTs and diodes and their relations in IGBT (insulated gate bipolar transistor) modules, a transient model of HV IGBT modules considering thermal characteristics was proposed. The model includes the transient model of IGBT module and the thermal characteristic module. The mechanism deduction and electrical equivalence are used to reduce the computational complexity without extracting the underlying parameters of the device and solving complex semiconductor equations. In the PSCAD / EMTDC simulation platform, the model test circuit and SABER general model are set up, and compared with the experimental measurement results to verify the validity of the model. The results show that the proposed model can not only realize the various operating states of IGBT modules in circuit simulation, but also simulate the transient characteristics of voltage and current spikes, tail current, Miller platform and diode reverse recovery in small steps , And consider the temperature loss and other parameters of the device. Therefore, this model can be used in the research of flexible DC transmission system simulation, electromagnetic interference and loss analysis and control strategy.