计及源-荷匹配的多区域多类型新能源系统优化规划方法

Optimization planning method of multi-region and multi-type renewable energy generation considering source-load matching

合理利用新能源出力互补性可平抑其出力波动性,在新能源规划中考虑互补性可令新能源规划布局更为合理。基于此,文中考虑新能源出力互补性,研究计及源-荷匹配的新能源系统优化规划方法,利用新能源总出力与负荷的正相关特性,保持新能源总出力与负荷的动态平衡。首先,基于源-荷匹配思想,提出描述新能源出力与负荷贴近程度的均衡度指标以及描述新能源出力与基准负荷一致程度的一致性指标。然后,建立计及源-荷匹配的多区域新能源系统优化规划模型,并通过引入新能源出力与负荷匹配均衡度约束来保证两者变化特性一致。最后,以我国北方4个区域的电网为例进行算例分析。研究结果表明,计及源-荷匹配的新能源系统优化规划可以综合考虑新能源消纳率和渗透率,为考虑新能源出力互补性的新能源规划布局提供解决方案。

The rational utilization of the complementarity between new energy sources can smooth out the fluctuation of their power output,and the consideration of complementarity in new energy planning can make the new energy planning layout more rational.Based on this,the paper considers the complementarity of new energy outputs and investigates the optimal planning method of new energy system taking into account the source-load matching.The positive correlation between new energy output and load is utilized to maintain the dynamic balance between new energy output and load.Firstly,based on the idea of source-load matching,an equalization index describing the degree of closeness between the new energy output and the load,and a consistency index describing the degree of positive correlation between the new energy output and the baseline load output are proposed.Then,a multi-region new energy optimization planning model considering the source-load matching is established,and a constraint on the equilibrium degree of the new energy output and the load matching is introduced to ensure the consistency of the change characteristics of the two.Finally,a case study is conducted to analyze the power grids of four regions in the northern part of China.The results show that the new energy optimization planning considering the source-load matching can consider the new energy consumption rate and penetration rate comprehensively,and provide a solution for the new energy planning layout considering the complementarity of new energy output.