Long-term optimal scheduling method for cascade hydro-wind-solar systems based on l2-box ADMM algorithm

Authors

• Dasong CHEN, China Yangtze Power Co., Ltd., Wuhan 430010, ChinaFollow
• Haojie SHI, College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
• Yaoxi HE, China Yangtze Power Co., Ltd., Wuhan 430010, China
• Bin LIU, China Yangtze Power Co., Ltd., Wuhan 430010, China
• Jun YAN, China Three Gorges Wuhan Science and Technology Innovation Park, China Three Gorges Corporation, Wuhan 430010, China
• Xiao ZHOU, China Three Gorges Wuhan Science and Technology Innovation Park, China Three Gorges Corporation, Wuhan 430010, China
• Yihao GUO, China Three Gorges Wuhan Science and Technology Innovation Park, China Three Gorges Corporation, Wuhan 430010, China
• Rouyu LIN, College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China

Keywords

cascade hydro-wind-solar system; new energy confidence capacity; reserve compensation; integervariable relaxation

Abstract

The construction of integrated hydro-wind-solar energy bases is a key initiative to promote the development of the new energy industry and achieve energy transition. However, the randomness and intermittency of new energy output pose significant challenges to the long-term optimal scheduling of cascade hydro-wind-solar systems. In response, this paper proposes a coordinated dispatch method for cascade hydro-wind-solar systems that incorporates new energy confidence capacity. First, a definition of new energy confidence capacity incorporating hydropower reserve compensation is proposed and transformed into a mixed-integer linear programming problem. Based on this, the constraints of hydropower units are meticulously modeled. To solve the model, an integer variable relaxation strategy based on the l2-Box ADMM is developed, enabling an equivalent transformation from a discrete-domain model to a continuous-domain model. Finally, the proposed dispatch model and solving algorithm are validated using a complementary system comprising two cascade hydropower stations along with wind and solar power stations. The results demonstrate the high effectiveness and practicality of the proposed method.

DOI

10.19781/j.issn.1673-9140.2026.02.022

First Page

246

Last Page

258

Recommended Citation

CHEN, Dasong; SHI, Haojie; HE, Yaoxi; LIU, Bin; YAN, Jun; ZHOU, Xiao; GUO, Yihao; and LIN, Rouyu (2026) "Long-term optimal scheduling method for cascade hydro-wind-solar systems based on l2-box ADMM algorithm," Journal of Electric Power Science and Technology: Vol. 41: Iss. 2, Article 22.
DOI: 10.19781/j.issn.1673-9140.2026.02.022
Available at: https://jepst.researchcommons.org/journal/vol41/iss2/22