Semi‐hot redundant control method for modular multilevel converter‐based high‐voltage direct current systems under submodules fault
Abstract A modular multilevel converter‐based high voltage direct current (MMC‐HVDC) system involves a large number of cascading submodules (SMs). The failure of SMs may critically degrade the system performance. Therefore, several redundant SMs can be incorporated and reasonably controlled to ensur...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2023-06-01
|
| Series: | IET Power Electronics |
| Subjects: | |
| Online Access: | https://doi.org/10.1049/pel2.12475 |
| _version_ | 1797817332654931968 |
|---|---|
| author | Lixia Yang Lixin Jia Yabin Zou Mingcan Zhang Haoxiang Yang |
| author_facet | Lixia Yang Lixin Jia Yabin Zou Mingcan Zhang Haoxiang Yang |
| author_sort | Lixia Yang |
| collection | DOAJ |
| description | Abstract A modular multilevel converter‐based high voltage direct current (MMC‐HVDC) system involves a large number of cascading submodules (SMs). The failure of SMs may critically degrade the system performance. Therefore, several redundant SMs can be incorporated and reasonably controlled to ensure the system reliable and continuous operation even if certain SMs fail. This paper proposes a semi‐hot redundant method for MMC‐HVDC systems. In the proposed strategy, when the system operates normally, the redundant SMs are controlled in a lower voltage range. These SMs do not require frequent charging and discharging, which decreases the switching loss. When ordinary SMs fail, the faulty SMs are bypassed and the corresponding number of redundant SMs can be promptly recharged to the rated voltage to replace the faulty SMs. The semi‐hot reserved SMs can shorten the transient process of faulty SMs replacement, and in this process, the absence of faulty SMs does not considerably influence the system. Thus, the original control and modulation strategies of the system do not need to be modified when several SMs fail. The performance of the proposed method is compared with those of the existing methods, and its validity is demonstrated through a small‐scale experimental prototype. |
| first_indexed | 2024-03-13T08:51:54Z |
| format | Article |
| id | doaj.art-0e6cce5b5962492da2f94e55d8e48575 |
| institution | Directory Open Access Journal |
| issn | 1755-4535 1755-4543 |
| language | English |
| last_indexed | 2024-03-13T08:51:54Z |
| publishDate | 2023-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | IET Power Electronics |
| spelling | doaj.art-0e6cce5b5962492da2f94e55d8e485752023-05-29T09:25:42ZengWileyIET Power Electronics1755-45351755-45432023-06-011681367138110.1049/pel2.12475Semi‐hot redundant control method for modular multilevel converter‐based high‐voltage direct current systems under submodules faultLixia Yang0Lixin Jia1Yabin Zou2Mingcan Zhang3Haoxiang Yang4School of Electrical Engineering Xi'an Jiaotong University Xi'an ChinaSchool of Electrical Engineering Xi'an Jiaotong University Xi'an ChinaSchool of Electrical Engineering Xi'an Jiaotong University Xi'an ChinaSchool of Electrical Engineering Xi'an Jiaotong University Xi'an ChinaSchool of Electrical Engineering Xi'an Jiaotong University Xi'an ChinaAbstract A modular multilevel converter‐based high voltage direct current (MMC‐HVDC) system involves a large number of cascading submodules (SMs). The failure of SMs may critically degrade the system performance. Therefore, several redundant SMs can be incorporated and reasonably controlled to ensure the system reliable and continuous operation even if certain SMs fail. This paper proposes a semi‐hot redundant method for MMC‐HVDC systems. In the proposed strategy, when the system operates normally, the redundant SMs are controlled in a lower voltage range. These SMs do not require frequent charging and discharging, which decreases the switching loss. When ordinary SMs fail, the faulty SMs are bypassed and the corresponding number of redundant SMs can be promptly recharged to the rated voltage to replace the faulty SMs. The semi‐hot reserved SMs can shorten the transient process of faulty SMs replacement, and in this process, the absence of faulty SMs does not considerably influence the system. Thus, the original control and modulation strategies of the system do not need to be modified when several SMs fail. The performance of the proposed method is compared with those of the existing methods, and its validity is demonstrated through a small‐scale experimental prototype.https://doi.org/10.1049/pel2.12475DC–AC power convertorsfault tolerant controlHVDC power convertorspulse width modulationredundancy |
| spellingShingle | Lixia Yang Lixin Jia Yabin Zou Mingcan Zhang Haoxiang Yang Semi‐hot redundant control method for modular multilevel converter‐based high‐voltage direct current systems under submodules fault IET Power Electronics DC–AC power convertors fault tolerant control HVDC power convertors pulse width modulation redundancy |
| title | Semi‐hot redundant control method for modular multilevel converter‐based high‐voltage direct current systems under submodules fault |
| title_full | Semi‐hot redundant control method for modular multilevel converter‐based high‐voltage direct current systems under submodules fault |
| title_fullStr | Semi‐hot redundant control method for modular multilevel converter‐based high‐voltage direct current systems under submodules fault |
| title_full_unstemmed | Semi‐hot redundant control method for modular multilevel converter‐based high‐voltage direct current systems under submodules fault |
| title_short | Semi‐hot redundant control method for modular multilevel converter‐based high‐voltage direct current systems under submodules fault |
| title_sort | semi hot redundant control method for modular multilevel converter based high voltage direct current systems under submodules fault |
| topic | DC–AC power convertors fault tolerant control HVDC power convertors pulse width modulation redundancy |
| url | https://doi.org/10.1049/pel2.12475 |
| work_keys_str_mv | AT lixiayang semihotredundantcontrolmethodformodularmultilevelconverterbasedhighvoltagedirectcurrentsystemsundersubmodulesfault AT lixinjia semihotredundantcontrolmethodformodularmultilevelconverterbasedhighvoltagedirectcurrentsystemsundersubmodulesfault AT yabinzou semihotredundantcontrolmethodformodularmultilevelconverterbasedhighvoltagedirectcurrentsystemsundersubmodulesfault AT mingcanzhang semihotredundantcontrolmethodformodularmultilevelconverterbasedhighvoltagedirectcurrentsystemsundersubmodulesfault AT haoxiangyang semihotredundantcontrolmethodformodularmultilevelconverterbasedhighvoltagedirectcurrentsystemsundersubmodulesfault |