Abstract
Circulating current control is critical for im-proving the performance of modular multilevel converter (MMC). Many schemes have been proposed in the literature to achieve such control. However, the impact of circulating current controllers on the converter impedance and system stability is yet to be studied. This paper presents the se-quence impedance model of MMC based on multiharmonic linearization method to investigate the system stability and analyze potential resonance modes. Three different circulating current control schemes are modeled to compare their impedance shaping effects. The sequence impedance model has been validated by simulation frequency scanning results. The impedance differences in the low frequency range lead to different grid interactions, illustrated through both Bode-plot-based stability analysis and simulation. Based on the analysis, an optimal design of circulating current control scheme can be achieved considering both MMC performance and system stability.
| Original language | English |
|---|---|
| Title of host publication | 2022 International Power Electronics Conference, IPEC-Himeji 2022-ECCE Asia |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 555-561 |
| Number of pages | 7 |
| ISBN (Electronic) | 9784886864253 |
| DOIs | |
| Publication status | Published - 2022 |
| Externally published | Yes |
| Event | 2022 International Power Electronics Conference, IPEC-Himeji 2022-ECCE Asia - Himeji, Japan Duration: May 15 2022 → May 19 2022 |
Publication series
| Name | 2022 International Power Electronics Conference, IPEC-Himeji 2022-ECCE Asia |
|---|
Conference
| Conference | 2022 International Power Electronics Conference, IPEC-Himeji 2022-ECCE Asia |
|---|---|
| Country/Territory | Japan |
| City | Himeji |
| Period | 5/15/22 → 5/19/22 |
Bibliographical note
Publisher Copyright:© 2022 IEEJ-IAS.
ASJC Scopus Subject Areas
- Energy Engineering and Power Technology
- Renewable Energy, Sustainability and the Environment
- Electrical and Electronic Engineering
- Safety, Risk, Reliability and Quality
- Control and Optimization
Keywords
- circulating current control
- Modular multilevel converter
- sequence impedance model
