Abstract
Parallel hydropower systems encounter a high risk of spillage in flood periods. Therefore, controlling spillage should be considered when hydropower systems increase power generation and satisfy power grid demand. To meet multiple operation targets, an effective operation method needs to precisely control the reservoir level and quickly adjust the power schedule based on real-time load changes. In this paper, an optimal operation method for parallel hydropower systems combining reservoir level control and power distribution is proposed. The method generates reservoir level control rules using a multi-objective simulation method for no gird demands operation. It obtains a power distribution schedule considering spill risk and non-storage losses for gird demands. Taking a parallel system in southwest China as an example, the results show that the method can produce an annual power generation of 55.2 billion kWh, which is a 6.1% improvement compared to regular method. Moreover, it can precisely control the daily water level and quickly adjust power distribution. It can be applied to parallel systems and has favorable results in power generation, peak shaving, and especially spillage reduction.
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Some data, models, or code generated or used during the study are available from the corresponding author by request.
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Acknowledgements
The research work described in this paper is supported by the National Natural Science Foundation of China (52179005 and 91647113). The authors gratefully acknowledge senior engineer Liu Yan of State Grid Chongqing Electric Company, who suggest modifications and improvement suggestions to the work described in this paper.
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The research work described in this paper is supported by the National Nature Science Foundation of China (52179005 and 91647113).
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All authors contributed to the study conception and design. Xinyu Wu and Chuntian Cheng provided the idea of the model construction. Xinyu Wu and Yuan Lei collected study data and analyzed model performance results. The first draft of the manuscript was written by Yuan Lei and revised by Qilin Ying. All authors read and approved the final manuscript.
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Wu, X., Lei, Y., Cheng, C. et al. An Optimal Operation Method for Parallel Hydropower Systems Combining Reservoir Level Control and Power Distribution. Water Resour Manage 37, 1729–1745 (2023). https://doi.org/10.1007/s11269-023-03451-x
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DOI: https://doi.org/10.1007/s11269-023-03451-x