Transient Fluctuation Suppression Strategy for MMC Flexible DC Systems Based on Gain-Varying Extended Disturbance Observer
Modular Multilevel Converter Based High Voltage Direct Current (MMC-HVDC) system is an important technical means to realize grid connection and transmission of new energy. When the external disturbance occurs in the MMC-HVDC system, the submodule capacitance voltages suffer instant impact due to the...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IEEE
2024-01-01
|
| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/10706228/ |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1841536194927656960 |
|---|---|
| author | Huanruo Qi Yilong Kang Xiaojv Lv Ziwen Liu Xiangyang Yan Fang Guo |
| author_facet | Huanruo Qi Yilong Kang Xiaojv Lv Ziwen Liu Xiangyang Yan Fang Guo |
| author_sort | Huanruo Qi |
| collection | DOAJ |
| description | Modular Multilevel Converter Based High Voltage Direct Current (MMC-HVDC) system is an important technical means to realize grid connection and transmission of new energy. When the external disturbance occurs in the MMC-HVDC system, the submodule capacitance voltages suffer instant impact due to the mutual coupling in the MMC, which causes transient fluctuation and unstable operation of the system. In order to suppress the impact of external disturbance on the internal submodule capacitance voltage transient fluctuations of MMC-HVDC system, the transient fluctuation suppression strategy based on gain-varying extended disturbance observer is proposed in this paper. Firstly, the transient response characteristic equation of the submodule capacitor voltage fluctuation component for MMC-HVDC system is constructed, which reveals the relation between the external output and internal dynamic response of the system. Next, a gain-varying extended disturbance observer is proposed to effectively observe the time-varying disturbance current components in the system, and the corresponding submodule capacitor voltage transient fluctuation suppression strategy is then proposed to improve the dynamic response performance and anti-interference ability of the MMC-HVDC system under different disturbances. The simulation model of MMC-HVDC system is built on PSCAD/EMTDC platform, and the validity and correctness of the proposed method are verified by several simulation tests. |
| format | Article |
| id | doaj-art-a0353df4309148ccad8635840fe14c4c |
| institution | Kabale University |
| issn | 2169-3536 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj-art-a0353df4309148ccad8635840fe14c4c2025-01-15T00:03:30ZengIEEEIEEE Access2169-35362024-01-011214630314631410.1109/ACCESS.2024.347469610706228Transient Fluctuation Suppression Strategy for MMC Flexible DC Systems Based on Gain-Varying Extended Disturbance ObserverHuanruo Qi0Yilong Kang1Xiaojv Lv2Ziwen Liu3https://orcid.org/0000-0002-4081-6923Xiangyang Yan4Fang Guo5Economic and Technological Research Institute of State Grid Henan Electric Power Company, Zhengzhou, Henan, ChinaEconomic and Technological Research Institute of State Grid Henan Electric Power Company, Zhengzhou, Henan, ChinaSchool of Electrical and Power Engineering, Hohai University, Nanjing, Jiangsu, ChinaSchool of Electrical and Power Engineering, Hohai University, Nanjing, Jiangsu, ChinaEconomic and Technological Research Institute of State Grid Henan Electric Power Company, Zhengzhou, Henan, ChinaEconomic and Technological Research Institute of State Grid Henan Electric Power Company, Zhengzhou, Henan, ChinaModular Multilevel Converter Based High Voltage Direct Current (MMC-HVDC) system is an important technical means to realize grid connection and transmission of new energy. When the external disturbance occurs in the MMC-HVDC system, the submodule capacitance voltages suffer instant impact due to the mutual coupling in the MMC, which causes transient fluctuation and unstable operation of the system. In order to suppress the impact of external disturbance on the internal submodule capacitance voltage transient fluctuations of MMC-HVDC system, the transient fluctuation suppression strategy based on gain-varying extended disturbance observer is proposed in this paper. Firstly, the transient response characteristic equation of the submodule capacitor voltage fluctuation component for MMC-HVDC system is constructed, which reveals the relation between the external output and internal dynamic response of the system. Next, a gain-varying extended disturbance observer is proposed to effectively observe the time-varying disturbance current components in the system, and the corresponding submodule capacitor voltage transient fluctuation suppression strategy is then proposed to improve the dynamic response performance and anti-interference ability of the MMC-HVDC system under different disturbances. The simulation model of MMC-HVDC system is built on PSCAD/EMTDC platform, and the validity and correctness of the proposed method are verified by several simulation tests.https://ieeexplore.ieee.org/document/10706228/MMC-based flexible dc systemsmodular multilevel convertersubmodule capacitor voltagetransient fluctuationgain-varying extended disturbance observerdisturbance suppression |
| spellingShingle | Huanruo Qi Yilong Kang Xiaojv Lv Ziwen Liu Xiangyang Yan Fang Guo Transient Fluctuation Suppression Strategy for MMC Flexible DC Systems Based on Gain-Varying Extended Disturbance Observer IEEE Access MMC-based flexible dc systems modular multilevel converter submodule capacitor voltage transient fluctuation gain-varying extended disturbance observer disturbance suppression |
| title | Transient Fluctuation Suppression Strategy for MMC Flexible DC Systems Based on Gain-Varying Extended Disturbance Observer |
| title_full | Transient Fluctuation Suppression Strategy for MMC Flexible DC Systems Based on Gain-Varying Extended Disturbance Observer |
| title_fullStr | Transient Fluctuation Suppression Strategy for MMC Flexible DC Systems Based on Gain-Varying Extended Disturbance Observer |
| title_full_unstemmed | Transient Fluctuation Suppression Strategy for MMC Flexible DC Systems Based on Gain-Varying Extended Disturbance Observer |
| title_short | Transient Fluctuation Suppression Strategy for MMC Flexible DC Systems Based on Gain-Varying Extended Disturbance Observer |
| title_sort | transient fluctuation suppression strategy for mmc flexible dc systems based on gain varying extended disturbance observer |
| topic | MMC-based flexible dc systems modular multilevel converter submodule capacitor voltage transient fluctuation gain-varying extended disturbance observer disturbance suppression |
| url | https://ieeexplore.ieee.org/document/10706228/ |
| work_keys_str_mv | AT huanruoqi transientfluctuationsuppressionstrategyformmcflexibledcsystemsbasedongainvaryingextendeddisturbanceobserver AT yilongkang transientfluctuationsuppressionstrategyformmcflexibledcsystemsbasedongainvaryingextendeddisturbanceobserver AT xiaojvlv transientfluctuationsuppressionstrategyformmcflexibledcsystemsbasedongainvaryingextendeddisturbanceobserver AT ziwenliu transientfluctuationsuppressionstrategyformmcflexibledcsystemsbasedongainvaryingextendeddisturbanceobserver AT xiangyangyan transientfluctuationsuppressionstrategyformmcflexibledcsystemsbasedongainvaryingextendeddisturbanceobserver AT fangguo transientfluctuationsuppressionstrategyformmcflexibledcsystemsbasedongainvaryingextendeddisturbanceobserver |