1.中国电力科学研究院，北京市 100192;2.清华大学电机工程与应用电子技术系，北京市 100084
1.China Electric Power Research Institute, Beijing 100192, China;2.Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
This work is supported by State Grid Corporation of China (No. XT71-18-030).
The highly efficient electromagnetic transient (EMT) simulation of hybrid modular multilevel converter (MMC) is an important basis for the related researches about hybrid MMC. However, because there are various kinds of sub-modules (SMs) can be employed, and a lot of power electronic switches are included in each kind of SMs, the detailed EMT model of hybrid MMC will reduce the simulation efficiency seriously. In view of this background, the unified dynamic averaging equivalent model of the series structure of the various SMs is proposed in this paper based on the switching function and the dynamic characteristic of capacitor. Besides, a unified terminal high efficiency EMT model of hybrid MMC based on the proposed dynamic model of the series structure is also presented and analyzed. The proposed unified model in this paper not only is convenient but also has the great simulation accuracy and efficiency, which has good portability and is especially important for a research tool to satisfied the convenience demand of modification. Finally, the simulation accuracy and efficiency of the proposed model are validated by the comparison with the detailed model based on the simulation components in ADPSS.