IGBT模块电气模型及实时仿真研究

Research on IGBT Module Electrical Model and Real Time Simulation

IGBT模块中IGBT与二极管各自详细暂态电气特性及相互影响少有研究,因此提出一种适于实时仿真的IGBT模块电气模型。模型采用机理推导、电气等效、曲线拟合等方法在PSCAD、SABER、SIMULINK等电路仿真平台建模并基于FPGA模型实时化,可以在纳秒级步长下模拟IGBT模块电压电流尖峰、拖尾电流、米勒平台等暂态电气特性。通过与SABER中通用模型仿真结果、实验实测波形对比分析以及搭建的FPGA实时仿真系统,验证了IGBT模块电气模型和参数提取方法的有效性,为进一步将模型应用于柔性直流输电系统仿真、电磁干扰及损耗分析、控制策略等研究打下了基础。

The existing IGBT models from literatures are rather difficult to simulate the switching transient and mutual influence of IGBT and diode. To solve this problem, an IGBT module electrical model for real time simulation is pro- posed. The proposed model is respectively implemented on platforms including PSCAD, SABER, SIMULINK, etc. by using the theoretical analysis, electric equivalence, curve fitting and other means. The proposed model can simulate the voltage and current spikes, tail current, miller platform and other characteristics. The accuracy and versatility of the IGBT module switching transient model are verified by the realization of FPGA real time simulation system compa- ring the simulation results from PSCAD with that from SABER and experimental results, which makes a foundation for further application research on flexible HVDC system simulation, loss analysis and control strategy optimization.