期刊
APPLIED ENERGY
卷 306, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.apenergy.2021.117968
关键词
Wind-photovoltaic-hydropower hybrid system; Hydropower operation; Risk analysis; Cascade reservoirs; Forecast uncertainty
资金
- National Natural Science Foundation of China [51909063,52079040]
- Fundamental Research Funds for the Central Universities [B210201023]
- National Key R&D Program of China [2019YFE0105200]
The study proposes a size optimization method using a multi-scale nested joint operation model to achieve high power generation benefit and power supply reliability through considering long-term, short-term, and real-time complementary strategies, notably including the forecast uncertainty of wind-PV output.
The complementary operation of wind, photovoltaic (PV) with hydropower stations has the potential to increase the consumption of renewable energy into the power grid. However, challenges remain to optimize the sizes of wind and photovoltaic plants integrated into the cascade hydropower stations. In this study, a size optimization method is proposed considering the balance of operation risk and benefit. First, a multi-scale nested joint operation model considering long-term, short-term and real-time complementary strategies, notably including the consideration of the forecast uncertainty of wind-PV output, is developed to simulate the operation of the hybrid system. Then, the optimal sizes are determined by a refined evaluation of the operation risk and benefit of the hybrid system. A case study in the Yalong River basin in China reveals that (1) the proposed multi-scale nested joint operation model can ensure not only high long-term power generation benefit, but also high power supply reliability; and (2) an appropriate wind-PV-hydropower size can achieve a higher power generation benefit and a lower load loss risk.
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