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Shutdown Strategy for Hybrid DC Transmission System in Offshore Wind Farm
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Chen FANG1, Xinchi WEI1, Shanshan SHI1, Jianpin YANG1, Xu CAI2, Zixi FANG2
Journal of Power Supply | 2024, 22(2) : 263 - 272
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Journal of Power Supply | 2024, 22(2): 263-272
• Power System •
Shutdown Strategy for Hybrid DC Transmission System in Offshore Wind Farm
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Chen FANG1, Xinchi WEI1, Shanshan SHI1, Jianpin YANG1, Xu CAI2, Zixi FANG2
Affiliations
  • 1 State Grid Shanghai Municipal Electric Power Company Shanghai 200120 China
  • 2 Key Laboratory of Control of Power Transmission and Conversion(Ministry of Education) Shanghai Jiao Tong University Shanghai 200240 China
Published: 2024-03-30 doi: 10.13234/j.issn.2095-2805.2024.2.263
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A shutdown strategy for a low-cost hybrid DC converter based on diode rectifier is studied. The shut-down process of the auxiliary converter is divided into an energy feedback stage and an energy dissipation stage. At the energy feedback stage, part of the energy stored in the capacitors of sub-modules is fed back to grid through the DC transmission line under the active control. At the energy dissipation stage, the resonant capacitor and the capacitors of sub-modules are discharged in sequence through a discharging resistor. The calculation methods for the discharging cur-rent, capacitance voltage, and discharging time are derived, and the design method for the discharging resistor is also given. The capacitors of the auxiliary converter can be discharged quickly and efficiently under the proposed shutdown strategy without a high-voltage and large-capacity discharging resistor, which is conducive to the realization in engineer-ing projects. Finally, a simulation model is constructed in Matlab/Simulink, and the validity of the shutdown strategy is verified by simulation results.

Diode rectifier  /  hybrid DC converter  /  discharge process  /  shutdown strategy  /  VSC-HVDC
Chen FANG, Xinchi WEI, Shanshan SHI, Jianpin YANG, Xu CAI, Zixi FANG. Shutdown Strategy for Hybrid DC Transmission System in Offshore Wind Farm[J]. Journal of Power Supply, 2024 , 22 (2) : 263 -272 . DOI: 10.13234/j.issn.2095-2805.2024.2.263
Funding
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  • Science and Technology Project of State Grid Corporation(520940200010)
Appendix
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Year 2024 volume 22 Issue 2
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Article Info
doi: 10.13234/j.issn.2095-2805.2024.2.263
  • Receive Date：2021-07-08
  • Online Date：2025-07-21
  • Published：2024-03-30
Article Data
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History
  • Received：2021-07-08
  • Revised：2021-09-09
  • Accepted：2021-09-22
Funding
Science and Technology Project of State Grid Corporation(520940200010)
Affiliations
    1 State Grid Shanghai Municipal Electric Power Company Shanghai 200120 China
    2 Key Laboratory of Control of Power Transmission and Conversion(Ministry of Education) Shanghai Jiao Tong University Shanghai 200240 China
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多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
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光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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