考虑风电不确定出力的风电并网协调优化模型  

Coordinated Optimization Model for Wind Power Integration Considering Wind Power Uncertainty Output

作　　者：于东[1] 孙欣[1] 高丙团[2] 徐勤[1] 

机构地区：[1]江苏大学电气信息工程学院,镇江212013 [2]东南大学电气工程学院,南京211100

出　　处：《电工技术学报》2016年第9期34-41,共8页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(51007032);江苏省高校优势学科建设工程资助项目

摘　　要：针对风电出力的随机性和间歇性等特点,首先,提出了风电预渗透率的概念,结合风电预测精度,建立了风电预测误差计算模型。其次,考虑到误差随时间的迁移性,建立了风电预测误差增长模型,并建立了基于误差增长的风电不确定出力计算模型。在建立负荷可参与调度的权重区间模型以及引入可调度负荷与储能系统的基础上,建立了风电成本模型和考虑可调度负荷与储能系统风电并网协调优化调度模型。最后,以某地区电力系统为研究对象,采用Matlab对优化模型进行仿真求解,结果表明,所用方法能够有效降低弃风率以及火电备用容量。Wind power has the features of uncertainty and intermittence. So firstly,the concept of the wind power pre-penetration rate is proposed. Combined with wind power forecast accuracy,the wind power forecast error is presented. Secondly, the model of wind power forecast error growth is established by considering the variability of wind power forecast error over time,and the model of wind power uncertainty（ WPU） based on error growth is established. On the basis of the weight interval of schedulable load（ WISL）,schedulable load（ SL）,and energy storage system（ ESS）,the wind cost model is established,and a coordinated optimization dispatch model for wind power integration considering load benefits is established. Finally,the Matlab is used to solve the optimization model. Taking the power system of a certain area as the research object,the results show that the given method can reduce the wind curtailment rate and thermal power reserve capacity.

关 键 词：风电不确定出力 误差增长 负荷效益 弃风率 备用 权重区间 

分 类 号：TM732[电气工程—电力系统及自动化]