考虑源荷协同的水风光一体化多时间尺度优化调度研究

Study on Optimal Scheduling of Hydro-wind-solar at Multiple Time Scales Considering Source-load Cooperation

以大规模、高比例新能源为主体的新型电力系统背景下,为解决中长期、短期水风光互补系统的电力质量、源荷协同矛盾的问题,本文提出了一种考虑不同时间尺度下水风光互补目标的水库优化调度决策,可实现不同时间尺度下的水风光一体化优化调度,指导水风光一体化系统的全周期运行过程。首先,从水风光一体化互补基本原理层面,阐述水风光一体化互补的机理、原则以及具体方法;其次,提出基于多时间尺度的以送电量为主、适应受端负荷的水风光互补调度多目标函数,构建水风光中长期—短期优化调度的多层嵌套调度模型,引入分层联合解耦、区间二分搜索算法求解;最后,通过不同时间尺度的水风光一体化场景与受端负荷特性确定边界,结合多目标函数构建水电中长期、短期优化调度方案。研究结果表明:利用水电灵活调节性能可有效提升中长期、短期水风光互补发电质量效益,同时增加对受端电力系统负荷的适应性。本次研究成果对水风光一体化系统的调度运行指导提供一定的经验借鉴和参考。

In the context of a novel electricity system characterized by widespread and high-percentage integration of new energy sources,this paper introduces the reservoir optimization dispatch rules that consider complementary objectives of hydro,wind,and solar at various time scales for the purpose of solving the problem of power quality and source-load balance contradiction of a hydrowindsolar complementary system(HWS)in both the short and long term.These rules enable the coordination of HWS at different time scales and guide the full-cycle operation process of HWS.First of all,the mechanism,principle and specific ways of HWS are elaborated from the level of the basic principle of HWS;Secondly,the multi-objective function of HWS based on multiple time scales,which is dominated by power delivery and adapted to the load at the receiving end,is proposed.And a multi-layer nested scheduling model for the long and short term optimization of HWS that introduce a hierarchical joint decoupling,interval bisection search algorithm for solving is developed.Finally,the boundaries are determined by simulating the hydro-wind-solar scenarios of different time scales with the characteristics of the load at the receiving end.On this basis,the optimal dispatch scheme for HWS is constructed by combining the multi-objective functions in the long and short term.The results show that:utilizing the flexible adjustment performance of hydropower can effectively improve the quality and efficiency of the HWS’power generation,and at the same time increase the adaptability to the load of the receiving end of the power system in long and short term.The results could provide a reference for the guidance of the scheduling and operation of the HWS.