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基于内点法考虑风电穿透率的区域间可用输电能力研究(2014年第3期)
类别:联席会学术论文专栏 发布时间:[2014-05-16] 点击数:806

李国庆1,孙银锋2,王利猛2
(1. 东北电力大学 电气工程学院,吉林 吉林 132012;2. 华北电力大学电气与电子工程学院,北京 102206)

摘要: 根据鼠笼异步风力发电机(SCIM)无功功率对机端电压和有功功率的表达式,修正了原-对偶内点法中的雅可比矩阵和海森矩阵,协调了算法的计算精度与迭代效率。采用连续潮流法计算了不同节点的穿透功率极限,得到SCIM 和恒功率因数控制的双馈感应风力发电机(DFIG)不同穿透率下的可用输电能力(ATC)值。仿真结果表明,联络区域节点接入风电场大幅提升送电区与受电区间的ATC,而对于送电区的风电接入情况结论相反;DFIG 的功率因数对ATC 有较大的影响;通过合理的补偿措施可解决某些并网方式下算法收敛于局部最优解的问题,多节点电压越限为陷入局部最优的主因。
关键词: 风电; 可用输电能力; 迭代效率; 局部最优; 雅可比矩阵; 海森矩阵; 穿透率; 联络区域; 模型

Interregional available transfer capability research based on interior point method with consideration of wind power penetration level
LI Guoqing1,SUN Yinfeng2,WANG Limeng2
(1. School of Electrical Engineering,Northeast Dianli University,Jilin 132012,China;2. School of Electrical and Electronics Engineering,North China Electric Power University,Beijing 102206,China)


Abstract: According to the expression of reactive power by terminal voltage and active power for SCIM(Squirrel-Cage Induction Machine),the Jacobian and Hessian matrices of primal-dual interior point algorithm are modified to coordinate its calculation accuracy and iteration efficiency. The continuation power flow algorithm is adopted to calculate the penetration limit for different buses and the ATC(Available Transfer Capability) of SCIM and DFIG(Doubly Fed Induction Generator) controlled by constant power factor under different penetration levels are obtained. Simulative results show that,the wind farm connecting to the tie-area may significantly improve the ATC between sending and receiving areas while the wind farm connecting to the sending area may worsen the ATC;the power factor of DFIG has larger influence on ATC;and multiple bus-voltage limit-violation may induce the local optimum of algorithm under some grid-connection modes,against which reasonable compensation measures should be applied.
Key words: wind power; available transfer capability; iteration efficiency; local optimum; Jacobian matrices;Hessian matrices; penetration level; tie-area; models

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