A Short-Term Hydropower Scheduling Model Considering Constraint Priorities
Publication: Journal of Water Resources Planning and Management
Volume 149, Issue 9
Abstract
Models for short-term optimal scheduling of hydropower stations should consider complex cascade constraints, hydropower station constraints, and unit operation constraints, all of which are inextricably linked. In practical scheduling, schedulers cannot be certain that the constraints they set based on their preferences are necessarily feasible, potentially leading to a no-solution situation. When the model has no solution, it is time-consuming to find conflicting constraints, and it is difficult to take the importance of different constraints into account, which will seriously affect the efficiency of day-ahead planning of hydropower stations. To solve the problem, a constraint grading model for short-term optimal scheduling of cascade hydropower stations is proposed in this paper. In both the flood and dry seasons, the model transforms five violable constraints into soft constraints and ranks them according to their importance, respectively. If the model has no solution, the soft constraints with low importance are automatically violated to obtain a feasible solution. The application example of Beipan cascade demonstrates that this model can effectively solve the problem of conflicting constraints. Moreover, compared with the penalty function method, this model can ensure that more important soft constraints are not violated.
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Data Availability Statement
Some data, models, or code generated or used during the study are available from the corresponding author by request, including the proposed MILP model and the LINGO codes used in solving the MILP model.
Acknowledgments
The research work described in this paper is supported by the National Natural Science Foundation of China (52179005 and 91647113).
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Information & Authors
Information
Published In
Journal of Water Resources Planning and Management
Volume 149 • Issue 9 • September 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Oct 14, 2022
Accepted: May 10, 2023
Published online: Jun 29, 2023
Published in print: Sep 1, 2023
Discussion open until: Nov 29, 2023
ASCE Technical Topics:
- Automation and robotics
- Climates
- Computer programming
- Computing in civil engineering
- Energy engineering
- Energy sources (by type)
- Engineering fundamentals
- Environmental engineering
- Floods
- Hydro power
- Hydrologic models
- Linear functions
- Mathematical functions
- Mathematics
- Models (by type)
- Renewable energy
- Seasonal variations
- Systems engineering
- Water and water resources
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