考虑源网荷效益的峰谷电价与峰谷时段双层优化模型

Bi-layer optimization model of peak-valley prices and peak-valley periods considering benefits of source-grid-load

用户响应行为测算需求解峰谷时段与峰谷电价之间的双线性项,目前仅考虑负荷曲线的数值大小对峰谷时段进行单独划分,分时电价实行效果受限。提出峰谷时段与峰谷电价的双层优化模型,考虑风电不确定性下的规划成本与发电成本,反映分时电价的实际经济效用;考虑用户响应的不确定性,保证分时电价实行后的源网荷效益在一定范围内变化;峰谷时段划分与峰谷电价设计均以系统成本最低为目标优化得到,充分考虑峰谷时段划分、峰谷电价设计和用户响应行为之间的交互机理。仿真结果表明,与单独划分峰谷时段的模型相比,所提模型能够制定更优、科学性更强的峰谷时段和峰谷电价,进一步降低系统总成本。

The measurement of user response behavior needs to solve the bilinear term between peak-valley periods and peak-valley electricity prices,at present,only the values of load curve is considered to individually divide the peak-valley periods,and the implementation effect of time-of-use price is limited.A bi-layer optimization model of peak-valley periods and peak-valley electricity prices is proposed,which considers the planning cost and generation cost under the uncertainty of wind power to reflect the actual economic utility of time-of-use price.The uncertainty of user response is considered to ensure that the benefit of source-gridload change within a certain range after the implementation of time-of-use price.Both peak-valley period division and peak-valley electricity price design are optimized with the minimum system cost as the object,and the interaction mechanism among division of peak-valley periods,design of peak-valley electricity prices and user response behavior is fully considered.The simulative results show that,compared with the model of individually dividing the peak-valley periods,the proposed model can formulate better and more scientific peak-valley periods and peak-valley electricity prices,and further reduce the total system cost.