论文分享：Comparison and Analysis of DSIM and SIMULINK Simulation Based on MMC System

标题：Comparison and Analysis of DSIM and SIMULINK Simulation Based on MMC System

作者：Liang Yongtao、Chen Jianan, Jiang Dong

单位：华中科技大学

本文发表于2021 IEEE 4th International Electrical and Energy Conference (CIEEC)。

阅读全文：https://ieeexplore.ieee.org/document/9510501

论文简介

由于其多级输出、易于扩展和高模块化的优势，模块化多电平变换器（MMC）在高压直流输电和可再生能源发电系统等多个领域中应用越来越广泛。MMC系统中存在许多开关器件，它们产生的电磁干扰（EMI）对系统稳定运行有着不可忽视的影响。本文采用DSIM仿真软件进行仿真研究。“这种仿真机制大大缩短了时间成本，使得电力电子仿真更加便捷。此外，它还能够仿真开关器件的瞬态过程。”本文比较了DSIM和Simulink的仿真结果，展示了DSIM软件在仿真电力电子电子电路方面的能力。

“This simulation mechanism greatly shortens the time cost and makes the power electronics simulation more convenient."

使用DSIM进行模块化多电平变换器（MMC）的高压直流输电系统仿真

本文“在DSIM上建立了一个17电平的模块化多电平变换器高压直流输电系统。该系统采用最近电平调制（NLM），包含内环电流控制器，可以进行闭环控制，并基于排序算法进行电容电压平衡”。

“A 17-level MMC-HVDC system is built on the DSIM platform. The system adopts the nearest level modulation (NLM), contains an inner loop current controller, can perform closed-loop control, and performs capacitor voltage balance based on a sequencing algorithm”.

本文在Simulink中也建立了相同的MMC系统，从通用MMC仿真模型和带有杂散参数的MMC仿真模型两个方面对DSIM与Simulink进行了对比。

对于通用MMC仿真模型，从两款仿真软件的结果对比中可以看出，“DSIM能够仿真IGBT的瞬态变化过程，而Simulink中的IGBT是一个理想模型，其开关动作是瞬时变化的。因此，DSIM中的IGBT模型更接近实际情况，仿真结果更为准确”。“就仿真速度而言，当系统运行时间为0.4秒，步长为0.1微秒时，Simulink仿真时间为8分20秒。DSIM由于采用自适应步长，不需要设置固定步长，其仿真时间为36秒。两者之间的差异接近14倍。由此可见，DSIM采用的离散状态事件驱动仿真方法是有效的，能够极大提高仿真速度，并且不会影响结果的准确性。”

“the DSIM software can simulate the transient change process of the IGBT, while the Simulink IGBT is an ideal model, and its switching action changes instantaneously. Therefore, the IGBT model of DSIM is closer to the actual situation, and the simulation results are more accurate”. “For the simulation speed, when the system running time is 0.4 s, and the step length is 0.1μs, the simulation time of Simulink software is 8 minutes and 20 seconds. DSIM simulation software does not need to set the step length due to its adaptive step length, and its simulation time is 36 seconds. The difference between the two is nearly 14 times. It can be seen that the discrete-state event-driven simulation mechanism adopted by DISM simulation software is effective and can greatly increase the simulation speed, and the results will not be affected.”

对于带有杂散参数的MMC仿真模型，DSIM可以在进行MMC仿真的同时仿真开关瞬态。“由DSIM获得的频谱具有更多的高阶谐波和更小的振幅，而这些在Simulink中会被忽略。”

“The spectrum obtained by the DSIM software has more high-order harmonics with less amplitude, which are ignored by the Simulink software.”