摘要
针对风电多时间尺度波动量不同的特性,提出采用能量型和功率型混合储能(hybrid energy storage system,HESS)依据主次双时间尺度(primary-secondary time-scale,PSTS)联合平抑的方法。首先详细分析和挖掘了PSTS风功率动态上下限波动机理,得到了PSTS交集的"切割效应"(cutting effect,CE)特征,建立了风电PSTS波动联合控制目标域数学模型,并推广到多尺度风功率波动;基于2种储能充电状态(state of charge,SOC)反馈与充放电功率限制,确定了各种状态下储能充放电功率及其在2种储能间的分配模型,制定了完整的混合储能充放电控制策略。其次,以三维空间关系分析法寻找了功率型和能量型储能容量配比与效果之间的关系。最后,根据国网规定标准,应用某风电场实际数据仿真验证了该控制策略将风电波动率限制在国网标准内的有效性,并确定了在效果较优基础上功率型和能量型储能容量最佳配比。
Aiming at multiple time-scale fluctuations of wind power, a control method applying hybrid energy storage system（HESS） composed of energy-type storage and power-type storage according to combined primary-secondary time-scale（PSTS） is proposed for fluctuation suppression. First, detailed mechanism of dynamic PSTS upper-lower limit of wind power fluctuation is analyzed, and characteristics of intersection cutting effect of PSTS are concluded. Mathematical models of PSTS and extended multiple time-scale combined control limit of wind power fluctuation are established respectively. HESS power and its distribution between two storages are set up based on state of charge（SOC） current feedback and HESS power limit, thus final whole control method is formulated. Secondly, 3D space method is used to explore relationship between effect and size proportion of energy-type storage and power-type storage. Finally, applying actual data of wind farm, validity of constraining fluctuation of wind power meeting Grid State standard is verified with simulation and optimal capacity of HESS is sized based on better effect.
出处
《电网技术》
EI
CSCD
北大核心
2015年第12期3369-3377,共9页
Power System Technology
基金
科技部国家国际科技合作专项资助项目(2013DFG61520)
国家自然科学基金资助项目(51267020)
高等学校博士学科点专项科研基金资助项目(20126501110003)~~
关键词
平抑波动
主次双时间尺度
切割效应
联合控制目标域
混合储能系统
fluctuation suppression
primary-secondary time-scale
cutting effect
combined control limit
hybrid energy storage system
