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A novel two-layer nested optimization method for a zero-carbon island integrated energy system, incorporating tidal current power generation

Author

Listed:
  • Han, Fengwu
  • Zeng, Jianfeng
  • Lin, Junjie
  • Gao, Chong
  • Ma, Zeyang

Abstract

Tidal current power generation (TCPG) has great potential to solve the unstable island energy supply problem because of strong predictability. However, TCPG construction and O&M are expensive and require appropriate capacity and scheduling strategies. Therefore, TCPG is added to a zero-carbon island integrated energy system (ZCIIES) coupled with electricity, thermal, hydrogen, and water as a flexible power in this study. Subsequently, a nested two-layer optimization approach is proposed. A multi-objective planning model in the upper layer, which aims at project economy and stability of power quality, is established to determine the optimal installed capacity; in the lower layer, a two-stage distributionally robust conditional value-at-risk (DRCVaR) model based on moment ambiguity is constructed to portray the uncertainty losses and improve the scheduling strategy. Finally, a case study is conducted, and the results demonstrate that: 1) TCPG was introduced into ZCIIES as a flexible power source, reducing energy storage capacity by 43.75% and total cost by 10.83% while ensuring stable operation. 2) The proposed method and two-stage DRCVaR model make ZCIIES operate effectively in balancing robustness and complexity, optimizing capacity allocation, ensuring economy, and quantifying the risk costs.

Suggested Citation

  • Han, Fengwu & Zeng, Jianfeng & Lin, Junjie & Gao, Chong & Ma, Zeyang, 2023. "A novel two-layer nested optimization method for a zero-carbon island integrated energy system, incorporating tidal current power generation," Renewable Energy, Elsevier, vol. 218(C).
    • Handle: RePEc:eee:renene:v:218:y:2023:i:c:s096014812301296x
    DOI: 10.1016/j.renene.2023.119381
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