考虑相关性的含风电的配电网无功优化  

Reactive Power Optimization in Distribution Network with Wind Turbine Generators Considering the Correlations

作　　者：郑能[1] 丁晓群[1] 管志成[1] 郑程拓 蒋煜[1] ZHENG Neng;DING Xiaoqun;GUAN Zhicheng;ZHENG Chengtuo;JIANG Yu(College of Energy and Electrical Engineering,Hohai University,Nanjing 211100,China)

机构地区：[1]河海大学能源与电气学院,南京211100

出　　处：《南方电网技术》2018年第1期62-69,共8页Southern Power System Technology

基　　金：江苏高校优势学科建设工程资助项目;国网山东省电力公司科技项目(5206021400NP)~~

摘　　要：随着间歇性分布式电源如风电的大量接入,有必要考虑其随机性和相关性对配电网无功优化的影响。首先,采用秩相关系数表示风速和负荷间的相关性,并利用拉丁超立方采样生成具有相关性的初始样本,再应用同步回代缩减法进行场景缩减,以提高计算效率;其次,建立了基于多场景的配电网无功优化模型,综合考虑了并联电容器、静止无功补偿器、有载调压变压器等电压-无功控制设备;然后,应用二阶锥松弛技术将传统无功优化模型转换为混合整数二阶锥规划模型,降低了求解难度;最后,通过改进的IEEE 33节点配电网验证了本文模型的合理性,并重点研究了相关性对无功优化的影响。With the integration of a large number of the intermittent distributed generators such as wind turbine generators(WTG)into distributed system,the influences brought by random and correlated variables have to be taken into consideration in the reactive power optimization of distribution network.Firstly,rank correlation coefficient is used to represent the the correlations between wind speed and load demand,and the initial correlated samples are generated by means of Latin hypercube sampling(LHS)techniques.In addition,the simultaneous backward reduction is applied to reduce the scenarios to improve the computation efficiency.Secondly,a reactive power optimization model based on multiple scenarios is proposed,considering the volt/var control devices such as shunt capacitor(SC),static var compensation(SVC),on-load tap changer(OLTC).And then,second order cone(SOC)relaxation is applied to transform the traditional reactive power optimization model to mixed integer second order cone programming(MISOCP)model,which can be tractably solved.Finally,the rationality of the proposed model is verified by the improved IEEE 33 node distribution network,and the effects of correlations on the reactive power optimization are emphatically studied.

关 键 词：风电机组 相关性 无功优化 拉丁超立方采样 场景缩减 混合整数二阶锥规划 

分 类 号：TM743[电气工程—电力系统及自动化]