中文摘要：

模块化多电平换流器（modular multilevel converter,MMC）已经展现出极其重要的工程应用前景,MMC的高效建模方法是开展一系列理论性和工程性问题研究的基础。文中分别针对不同时间尺度和不同的应用场景,对国内外已有的涉及到MMC建模的主要文献进行条分缕析式地整理归纳,进而探索该领域的研究前沿和关注的核心问题。对所提出的3种微秒级电磁暂态精确模型,也即基于受控源的MMC通用提速模型和基于后退欧拉法和梯形法的MMC戴维南等效整体模型进行了严格的横向对比和仿真验证;同时,针对所提出的电磁暂态平均简化模型,验证了其在仿真严重交直流暂态过程中的适用性,分析其适用场景和使用方法。最后,文中介绍了MMC机电暂态模型和实时仿真模型的主体思想,并指出二者具有很好的研究和应用前景。

英文摘要：

The modular multilevel converter（MMC） based HVDC system has shown its significant project prospects, hence the efficient modeling method of MMC is the basis for a series of theoretical and engineering studies. This paper respectively focused on different time scales and application scenarios to summarize the state of the art literatures of this field methodically, and then to explore the cutting-edge research to show the core issues and concerns in the MMC modeling area. The recent achievements on electromagnetic transient（EMT） accurate MMC models, i.e. the controlled sources based universal accelerated MMC model and the Thévenin equivalent integral MMC model based on the backward Euler method and the trapezoidal rule were rigorously and horizontally compared and validated. Then the applicability of the proposed simplified averaged-value MMC model under severe AC and DC transients were validated and the usage scenarios were pointed out. Finally, this paper introduces the main features of the electromechanical transient MMC model and the real time simulation models, then points out that both models have very good research and application prospects.