| Issue |
E3S Web Conf.
Volume 360, 2022
2022 8th International Symposium on Vehicle Emission Supervision and Environment Protection (VESEP2022)
|
|
|---|---|---|
| Article Number | 01073 | |
| Number of page(s) | 7 | |
| DOI | https://doi.org/10.1051/e3sconf/202236001073 | |
| Published online | 23 November 2022 | |
Capacitor voltage balance control strategy based on MMC-MTDC
1 Shanghai Dianji University, School of Electrical Engineering, 300 Shuihua Road, Pudong New Area, Shanghai, China
2 State Grid Shanghai Jinshan Electric Power Supply Company, Operation and Maintenance Department, 2522 Jinshan Avenue, Jinshan District, Shanghai, China
* Corresponding author: 1521377953@qq.com
The MMC is composed of a large number of sub-modules. The operating conditions of each sub-module are different, which will inevitably affect the capacitor voltage of each sub-module, resulting in the difference of the capacitor voltage of each sub-module. The problem of uneven voltage of the sub-module capacitor voltage of the MMC system is unavoidable, and the uneven voltage of the capacitor will greatly affect the stable operation of the MMC system. This paper studies the multi-terminal flexible DC transmission system (MMC-MTDC) based on modular multi-level converters. The multi-terminal MMC-MTDC system model is established through the MMC-MTDC converter station level and the MMC-MTDC system level controller, and then according to the shutdown process of MMC-MTDC system, several optimal control methods are proposed to realize energy feedback and sub-module discharge to achieve capacitor voltage balance. Finally, the effectiveness of the proposed method is verified by building a simulation model.
© The Authors, published by EDP Sciences, 2022
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0/).
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