Modeling and Analysis of High-Frequency MMC Impedance Considering Different Control Modes and Voltage Feedforward
The sequence impedance of modular multilevel converters (MMC) is the premise to analyze the stability of MMC-based high voltage direct current (HVDC) system. However, few papers have modeled MMC impedance with comprehensive consideration of different control modes and voltage feedforward, the high-f...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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IEEE
2020-01-01
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| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/9284456/ |
| _version_ | 1818732045795328000 |
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| author | Taiyuan Yin Yue Wang Xiaolei Wang Bo Yue Delin Zhao Jie Sun Pengkun Li Yonghui Liu |
| author_facet | Taiyuan Yin Yue Wang Xiaolei Wang Bo Yue Delin Zhao Jie Sun Pengkun Li Yonghui Liu |
| author_sort | Taiyuan Yin |
| collection | DOAJ |
| description | The sequence impedance of modular multilevel converters (MMC) is the premise to analyze the stability of MMC-based high voltage direct current (HVDC) system. However, few papers have modeled MMC impedance with comprehensive consideration of different control modes and voltage feedforward, the high-frequency impedance characteristics of the MMC have not been intensively studied, either. In fact, the voltage feedforward has an important influence on the high-frequency impedance characteristics of the MMC, which can not be ignored. This article proposes a sequence impedance for MMC considering complete control loops. Not only current inner-loop, circulating current control loop and phase-locked loop (PLL) are considered, but also different control modes including power control, DC voltage control and AC voltage control are considered. It is worth mentioning that especially the voltage feedforward and time delay are taken into account. Based on this impedance model, the characteristics of the MMC are thoroughly analyzed, and the analysis shows that the voltage feedforward and time delay will greatly affect the high-frequency characteristics, which will deeply affect the stability of the system. Meanwhile, the influences of PLL dynamics, outer-loop control, circulating current control and parameters of controller on the sequence impedance are also analyzed in detail. |
| first_indexed | 2024-12-17T23:27:20Z |
| format | Article |
| id | doaj.art-3e535622e84b4b0698c12a80715a49a5 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-17T23:27:20Z |
| publishDate | 2020-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-3e535622e84b4b0698c12a80715a49a52022-12-21T21:28:45ZengIEEEIEEE Access2169-35362020-01-01821857521858410.1109/ACCESS.2020.30428929284456Modeling and Analysis of High-Frequency MMC Impedance Considering Different Control Modes and Voltage FeedforwardTaiyuan Yin0https://orcid.org/0000-0002-7498-364XYue Wang1https://orcid.org/0000-0002-7496-8888Xiaolei Wang2Bo Yue3Delin Zhao4Jie Sun5Pengkun Li6Yonghui Liu7State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an, ChinaState Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an, ChinaZhongyuan University of Technology, Zhengzhou, ChinaState Grid Economic and Technological Research Institute Company Ltd., Beijing, ChinaState Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an, ChinaState Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an, ChinaState Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an, ChinaState Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an, ChinaThe sequence impedance of modular multilevel converters (MMC) is the premise to analyze the stability of MMC-based high voltage direct current (HVDC) system. However, few papers have modeled MMC impedance with comprehensive consideration of different control modes and voltage feedforward, the high-frequency impedance characteristics of the MMC have not been intensively studied, either. In fact, the voltage feedforward has an important influence on the high-frequency impedance characteristics of the MMC, which can not be ignored. This article proposes a sequence impedance for MMC considering complete control loops. Not only current inner-loop, circulating current control loop and phase-locked loop (PLL) are considered, but also different control modes including power control, DC voltage control and AC voltage control are considered. It is worth mentioning that especially the voltage feedforward and time delay are taken into account. Based on this impedance model, the characteristics of the MMC are thoroughly analyzed, and the analysis shows that the voltage feedforward and time delay will greatly affect the high-frequency characteristics, which will deeply affect the stability of the system. Meanwhile, the influences of PLL dynamics, outer-loop control, circulating current control and parameters of controller on the sequence impedance are also analyzed in detail.https://ieeexplore.ieee.org/document/9284456/Modular multilevel converter (MMC)voltage feedforwardimpedance modeltime delayhigh frequency |
| spellingShingle | Taiyuan Yin Yue Wang Xiaolei Wang Bo Yue Delin Zhao Jie Sun Pengkun Li Yonghui Liu Modeling and Analysis of High-Frequency MMC Impedance Considering Different Control Modes and Voltage Feedforward IEEE Access Modular multilevel converter (MMC) voltage feedforward impedance model time delay high frequency |
| title | Modeling and Analysis of High-Frequency MMC Impedance Considering Different Control Modes and Voltage Feedforward |
| title_full | Modeling and Analysis of High-Frequency MMC Impedance Considering Different Control Modes and Voltage Feedforward |
| title_fullStr | Modeling and Analysis of High-Frequency MMC Impedance Considering Different Control Modes and Voltage Feedforward |
| title_full_unstemmed | Modeling and Analysis of High-Frequency MMC Impedance Considering Different Control Modes and Voltage Feedforward |
| title_short | Modeling and Analysis of High-Frequency MMC Impedance Considering Different Control Modes and Voltage Feedforward |
| title_sort | modeling and analysis of high frequency mmc impedance considering different control modes and voltage feedforward |
| topic | Modular multilevel converter (MMC) voltage feedforward impedance model time delay high frequency |
| url | https://ieeexplore.ieee.org/document/9284456/ |
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