摘要
当多个风-储场站参与调频时,由于运行状态不同,导致其提供调频出力时的成本存在一定差异。另外,风电场参与调频时场内风机上的疲劳载荷也会增加,对风机安全性造成影响。为解决上述问题,文中提出一种基于风-储联合的双层频率响应控制策略,可通过协调风-储场站间与场内风机间的出力,在满足系统调频需求的同时,降低调频总成本及各风电场内载荷总量。首先,分析并量化风-储场站调频时的内损、老化及风险成本,并在场站协调层上建立场站有功分配控制策略,确定成本最低的各场站出力方案。然后,基于风机出力与尾流波动、疲劳载荷间的线性关系,采用和增积减算法在机组协调层上构建风电场分散式有功控制策略,协调风机间出力,在维持风电场调频性能的同时,降低场内载荷总量。最后,在MATLAB/Simulink中搭建含2个100×5 MW双馈风电场和2个100 MW/100 MW?h锂电池储能电站的IEEE RTS-79系统,仿真验证了所提策略的有效性。
When multiple wind farms and energy storage stations participate in frequency regulation,due to different operation conditions,there are certain differences in the cost of providing frequency regulation output.In addition,when the wind farm participates in frequency regulation,the fatigue load on the wind turbines in the wind farm will also increase,which will affect the operation safety of the wind turbines.In order to solve the above problems,this paper proposes a bi-level frequency response control strategy based on wind power and energy storage.It can reduce the total cost of frequency regulation and the total load in each wind farm by coordinating the output of the wind farms and energy storage stations and the wind turbines in the field while meeting the frequency regulation requirements of the system.First,the loss,degradation and risk cost of wind farms and energy storage stations during frequency regulation are analyzed and quantified,and the active power distribution control strategy of the station on the station coordination layer is established,while the lowest cost output plan of each station is determined.Then,based on the linear relationship between wind turbine output,wake fluctuation and fatigue load,an additive increase multiplicative decrease algorithm is adopted to build a decentralized active power control strategy for the wind farm on the unit coordination layer,which coordinates the output of the wind turbines.While maintaining the frequency regulation performance of the wind farm,the strategy can reduce the total load in the field.Finally,an IEEE RTS-79 bus system is built in MATLAB/Simulink,which contains two 100×5 MW doubly-fed wind farms and two 100 MW/100 MW·h lithium battery energy storage stations.The simulation verifies the effectiveness of the proposed strategy.
作者
杨伟峰
文云峰
张武其
邓步青
YANG Weifeng;WEN Yunfeng;ZHANG Wuqi;DENG Buqing(College of Electrical and Information Engineering,Hunan University,Changsha 410082,China)
出处
《电力系统自动化》
EI
CSCD
北大核心
2022年第12期184-193,共10页
Automation of Electric Power Systems
基金
国家自然科学基金资助项目(52077066)
湖南省自然科学优秀青年基金资助项目(2020JJ3011)
湖湘青年科技创新人才资助项目(2020RC3015)。
关键词
风电场
储能
调频
双层控制
分散式控制
疲劳载荷
wind farm
energy storage
frequency regulation
bi-level control
decentralized control
fatigue load
