摘要
为了利用热网特性补偿风电预测误差,提出了一种电-热系统混合时间尺度调度策略。考虑到电能和热能传输在时间尺度上的差异性,建立了热网短时间尺度调节模型。在日内调度阶段,将指令周期分为长时间尺度和短时间尺度,由长时间尺度调度确定日内阶段30 min级CHP机组的基本出力,短时间尺度调度则根据长时间尺度CHP机组的基本出力来确定日内15 min级常规机组的基本出力。在实时调度阶段,CHP机组在日内长时间尺度出力的基础上进行15 min级短时间尺度的调整,并协同储能设备补偿风电预测误差。通过算例验证表明,考虑风电预测误差的电-热系统混合时间尺度调度模型,降低了储能设备的使用率,提升了电-热系统的经济性,同时具有良好的风电预测误差补偿效果。
To use the characteristics of a heating network to compensate for wind power forecast error,a hybrid time-scale dispatch strategy for an electric-heating system is proposed.Considering the differences in time-scale between electric energy and heat energy transmission,a short time-scale regulation model of the heating network is established.In intra-day dispatch,the dispatch model is divided into long(30 minutes)and short(15 minutes)time-scale models to obtain the scheduling scheme of CHP and conventional units,respectively.In real-time dispatch,based on the results of the long time-scale model,CHP units are adjusted on the short time-scale to compensate for the forecast error with energy storage system.The simulation results verify that this model of an electric-heating system reduces the utilization rate of the energy storage system,improves the economy of the electric-heating system,and has a good effect on wind power forecast error compensation.
作者
夏洪伟
李坤
韩丽
XIA Hongwei;LI Kun;HAN Li(School of Electrical Engineering,China University of Mining and Technology,Xuzhou 221116,China)
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2022年第17期86-96,共11页
Power System Protection and Control
基金
国家自然科学基金项目资助(62076243)。
关键词
调度
热网
混合时间尺度
预测误差
综合能源系统
dispatch
heating network
hybrid time-scale
forecast error
integrated energy system
