Issue |
Sci. Tech. Energ. Transition
Volume 80, 2025
Innovative Strategies and Technologies for Sustainable Renewable Energy and Low-Carbon Development
|
|
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Article Number | 17 | |
Number of page(s) | 12 | |
DOI | https://doi.org/10.2516/stet/2024104 | |
Published online | 27 January 2025 |
Regular Article
Multi-timescale scheduling optimization of cascade hydro-solar complementary power stations considering spatio-temporal correlation
1
Southwest Branch of State Grid Co., Ltd., Chengdu 610041, Sichuan Province, PR China
2
College of Electrical Engineering, Sichuan University, Chengdu 610065, Sichuan Province, PR China
* Corresponding author: 1746039597@qq.com
Received:
8
October
2024
Accepted:
18
November
2024
The water-PV hybrid generation system is an effective approach to promoting renewable energy integration; however, most existing hydropower stations are run-of-river type with limited annual regulation capacity. Enhancing the PV absorption capacity of such run-of-river hydropower is thus crucial for achieving localized renewable energy utilization. This study proposes a multi-timescale optimization scheduling method for cascade water-PV complementary systems, accounting for spatiotemporal correlations. First, using historical data and Frank-Copula based correlation analysis, we identify the spatiotemporal interactions between water and PV outputs to generate numerous scenarios that capture the coupled characteristics of water-PV generation within the watershed. Considering constraints related to reservoir capacity, water level, flow rate, and individual unit output, a multi-timescale optimization scheduling model is formulated with a single unit as the smallest dispatch unit. To improve computational efficiency, a triangular weighting method is introduced to simplify complex constraints. Finally, a case study within a watershed in Southwest China validates the model’s effectiveness and reliability, providing a valuable reference for enhancing PV absorption capacity through the utilization of run-of-river cascade hydropower.
Key words: Cascade Hydro-Photovoltaic complementary system / Copula spatio-temporal correlation / Optimal dispatch
© The Author(s), published by EDP Sciences, 2025
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