考虑机组组合和网络结构优化的电网规划方法

随着风电等可再生能源发电接入规模的不断增加,电网面临的不确定性因素显著增加,对电力系统规划造成深远影响。针对目前研究中尚缺乏含可再生能源电网规划同时考虑机组组合和网络结构化的问题,以运行成本、弃可再生能源成本和切负荷成本之和最小为优化目标,综合考虑新建线路约束、网络结构优化约束和机组组合约束,并采用不同场景描述可再生能源出力和负荷需求的不同水平,建立了嵌入机组组合和网络结构优化的可再生能源接入系统电网规划模型,系统分析了电网规划方案的经济性及对可再生能源的消纳能力,为电网规划工作提供重要的辅助决策依据。通过IEEE RTS-24算例分析验证了所提方法的有效性。

Power System Planning Method Considering Unit Commitment and Optimal Transmission Switching

With the increasing integration of wind power and other renewable energies into the power system,the uncertainties facing the power system are significantly increasing,bringing a far-reaching impact on the power system planning.Considering that in the existing researches,there is still a lack of planning for power system containing renewable energies while taking into account the unit commitment(UC)and optimal transmission switching(OTS)in the meantime,a UC and OTS-based planning model for the system with integration of renewable energies is built,which comprehensively considers the constraints of new line construction,network topology optimization,and UC,and takes the objective of minimizing the sum of costs of system operation,renewable energy generation curtailment,and load curtailment.In addition,multiple scenarios are adopted to describe different levels of renewable energy generation output and load demand.As a result,the proposed method can systematically analyze the economy of the power system planning scheme and the accommodation capability of renewable energies,providing important auxiliary decision-making reference for power system planning.The effectiveness of the proposed method is verified through a case study of an IEEE RTS-24 system.