Abstract
The modular multilevel converter (MMC) has many advantages like excellent harmonic performance, low switching loss and so on. As a result, it's widely applied in the field of large-scale renewable energy centralized power generation and high voltage flexible DC transmission. However, a large number of submodule capacitors in MMC result in its large size and high cost, which should hinder the large-scale promotion of flexible DC transmission. By optimizing the control strategy of MMC, the capacitor voltage fluctuation MMC's submodules can be reduced, which is conducive to reducing the requirements on the capacitance value, volume and cost of the submodules. In this paper, the capacitor voltage fluctuation principle of the MMC submodule is analyzed. Then the collaborative injection strategy is proposed to reduce the capacitor voltage fluctuation effectively, it's a combination of second harmonic current injection and the third harmonic voltage injection, and in collaborative injection strategy the second harmonic voltage controller is designed to control the second harmonic component of capacitor voltage. Finally, the effectiveness of the collaborative injection strategy is verified by simulation.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 18th IEEE Conference on Industrial Electronics and Applications, ICIEA 2023 |
| Editors | Wenjian Cai, Guilin Yang, Jun Qiu, Tingting Gao, Lijun Jiang, Tianjiang Zheng, Xinli Wang |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 880-885 |
| Number of pages | 6 |
| ISBN (Electronic) | 9798350312201 |
| DOIs | |
| State | Published - 2023 |
| Externally published | Yes |
| Event | 18th IEEE Conference on Industrial Electronics and Applications, ICIEA 2023 - Ningbo, China Duration: 18 Aug 2023 → 22 Aug 2023 |
Publication series
| Name | Proceedings of the 18th IEEE Conference on Industrial Electronics and Applications, ICIEA 2023 |
|---|
Conference
| Conference | 18th IEEE Conference on Industrial Electronics and Applications, ICIEA 2023 |
|---|---|
| Country/Territory | China |
| City | Ningbo |
| Period | 18/08/23 → 22/08/23 |
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 7 Affordable and Clean Energy
Keywords
- Modular multilevel converter (MMC)
- capacitor voltage fluctuation reduction
- collaborative injection strategy
- second harmonic current injection
- third harmonic voltage injection
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