考虑约束分级破坏的梯级水电短期优化调度方法OA

The operation of cascade hydropower plants needs to handle complex constraints such as grid peak regula-tion,power supply,ecological water release,and water level control.The inherent interdependence and spatiotempo-ral coupling among hydropower variables often lead to inaccurate identification of constraint conflicts and difficulties in adjusting constraint thresholds,directly affecting the optimization accuracy and computational efficiency of cas-cade hydropower scheduling.To address these issues,this paper proposes a short-term optimization scheduling method for cascade hydropower that considers hierarchical constraint violation.A hierarchical classification method that characterizes the importance and extent of constraint violations is adopted to determine the order and magnitude of constraint adjustments.Furthermore,,the slack variables are normalized to avoid distortion of penalty coefficient caused by magnitude differences,ensuring that the hierarchical classification results can be accurately incorporated into the optimization model.A constraint violation prediction method is then used to determine the relaxation level of each constraint,mitigating the difficulty in constraint hierarchy differentiation and low solution efficiency caused by an excessive number of soft constraints.The proposed method was validated in a river basin in southwest China,achieving balanced adjustments among water level control,contracted power,and peak regulation constraints,and improving the adjustment accuracy and solution quality of hydropower scheduling tasks during constraint conflicts.