结合随机规划和序贯蒙特卡洛模拟的风电场储能优化配置方法

通过在风电场站内优化配置储能资源,可以有效平抑风力发电的出力波动,提高风电的并网消纳水平。结合多场景随机规划和序贯蒙特卡洛模拟方法,提出了考虑储能寿命折损的风电场站内储能优化配置方法。首先,利用考虑风电出力和负荷典型场景集的随机规划模型,求解风电场站内储能的初始配置方案。其次,利用自回归滑动平均模型模拟出风电场全年时序风速,利用序贯蒙特卡洛模拟出机组、线路工作状态时序,对配置初始储能方案的联合发电系统进行全年运行模拟。然后,基于运行模拟中储能的等效循环寿命和储能容量的收益投资比对储能初始配置方案进行修正。仿真结果表明,所提方法能够有效考虑风电场全年的出力变化,以及储能循环寿命折损的影响,获得合理的储能优化配置方案。

Qualification of Three Analytical Wake Models

The decrease of wind velocity （wake losses） in downstream area of wind turbine is generally quantified using wake models. The overall estimated power of wind farm varies according to reliability of wake model used, however it＇s unclear which model is most appropriate and able to give a high performance in predicting wind velocity deficit. In this subject, a qualification of three analytical wake models （Jensen, lshihara and Frandsen） based on three principal criteria is presented in this paper： （i） the parsimony which characterizes the inverse of model complexity, （ii） the accuracy of estimation in which wake model is compared with the experimental data and （iii） imprecision that is related to assumptions and uncertainty on the value of variables considered in each model. This qualitative analysis shows the inability of wake models to predict wind velocity deficit due to the big uncertainty of variables considered and it sensitivity to wind farm characteristic.