合同电量完成约束下考虑梯级水电站耦合特性的中长期机组组合  

The long-term unit commitment optimization considering the coupling characteristics of cascade hydropower stations under the constraints of power contract

作　　者：赵翔宇 代江 赵倩 何润泉 谢敏[2] 刘明波[2] ZHAO Xiangyu;DAI Jiang;ZHAO Qian;HE Runquan;XIE Min;LIU Mingbo(Electric Power Dispatching Control Center Of Guizhou Power Grid Co.,Ltd.,Guiyang 550002 Guizhou,China;School of Electric Power,South China University of Technology,Guangzhou 510640 Guangdong,China)

机构地区：[1]贵州电网有限责任公司电力调度控制中心,贵州贵阳550002 [2]华南理工大学电力学院,广东广州510640

出　　处：《电力大数据》2021年第7期84-92,共9页Power Systems and Big Data

摘　　要：针对中长期合同电量分解结果与实际调度计划中的合同电量完成的偏差,本文提出了一种合同约束下的中长期机组组合模式和优化模型,即,考虑合同电量完成进度及均衡性的中长期机组组合。该模型充分考虑复杂梯级水电站群对系统运行调度的影响;模型中引入基尼系数理论建立合同电量修正机制,将中长期合同电量以小时为单位分解嵌套优化,有利于中长期市场与现货市场的有效衔接。模型实现过程中既考虑了竞价机组的电量优化和修正,又保证了非竞价机组的购电成本最小,实现竞价机组和非竞价机组的协同优化。最后,通过某省级电网算例证明所提模型的有效性。结果表明,所提模型能有效降低合同电量完成进度偏差,改善各时段电量完成偏差的均衡性,具有较好的应用前景。In view of the deviation between the decomposition result of the medium and long-term contract electricity and the actual contract electricity completion in the dispatch plan,this paper presents a medium and long-term unit commitment model and optimization model under contract constraints,that is,medium-and long-term unit commitment with consideration of schedule and balance of contract electricity.In this model,the effect of complex cascade hydropower stations on the system operation is fully considered,and the KEENY coefficient theory is introduced to establish the contract electricity correction mechanism,and the medium and long term contract electricity is decomposed into hourly units and nested optimization,in favor of the effective link between the medium and long-term market and the spot market.The model not only considers the power optimization and modification of bidding units,but also ensures the minimum cost of purchasing power of non-bidding units.Finally,an example of a provincial power grid is given to demonstrate the effectiveness of the proposed model.The results show that the proposed model can effectively reduce the schedule deviation and improve the balance of the schedule deviation,and has a good application prospect.

关 键 词：中长期合同电量 机组组合 梯级水电站 电力市场 基尼系数 

分 类 号：TM732[电气工程—电力系统及自动化]