流域水风光一体化运行协同效益对比分析方法OA

Hydro-wind-solar integration represents an innovative dispatching paradigm for power grids in southwestern prov-inces of China.However,owing to the volatility of hydro-wind-solar power outputs,seasonal variations in hydropower regulation capacity,and the complex coupling between water regulation and power dispatching boundaries,the synergistic benefits of such in-tegration are difficult to accurately assess,leaving the exploration of new dispatching mechanisms without a solid foundation.This paper first clarifies the definitions and differences between synergistic and non-synergistic operation of hydro-wind-solar com-plementary operation.A benefit indicator system for integrated operation is constructed by considering multiple requirements:re-source utilization,electricity accommodation,transmission capacity,and load response.Second,multi-timescale optimization sim-ulation models for synergistic and non-synergistic operation are established to meet the needs of long,medium,and short-term dispatching.Mixed-integer linear programming(MILP)is adopted to handle complex non-convex and nonlinear constraints and enable efficient model solving.Finally,three differentiated integrated hydro-wind-solar project clusters,denoted as L,Y,and J,in a river basin in southwestern China are selected as engineering case studies.The operational benefits of synergistic and non-synergistic operation are compared in detail under long,medium,and short timescales as well as wet and dry inflow scenari-os.A preference atlas of hydro-wind-solar integration is formulated based on the simulation outcomes.The results reveal that no substantial benefit gap exists between synergistic and non-synergistic operation when transmission channel capacity is sufficient;however,prominent synergistic gains emerge under constrained transmission capacity.By utilizing reservoir storage to shift hydro-power electricity over time,transmission channel capacity can be reserved for new energy sources,thereby reducing new energy curtailment induced by transmission congestion.The results can provide a reference for developing dispatching systems for water-shed-scale hydro-wind-solar integration.