Large-scale OPF Based on Voltage Grading and Network Partition  

作　　者：Yude Yang Zhongbiao Wu Yiyi Zhang Hua Wei 

机构地区：[1]Guangxi Key Laboratory of Power System Optimization and Energy Technology,Guangxi University,Nanning 530004,China

出　　处：《CSEE Journal of Power and Energy Systems》2016年第2期56-61,共6页中国电机工程学会电力与能源系统学报（英文）

基　　金：supported by National Basic Research Program of China(973 Program)under Grant 2013CB228205;National Natural Science Foundation of China under Grant 51541707.

摘　　要：In this paper,a model of a large-scale optimal power flow(OPF)under voltage grading and network partition and its algorithm is presented.Based on the principles of open loop operations,the node injecting current method is used to divide the large-scale power grid into voltage grading and district dividing structures.The power network is further divided into a high-voltage main network and several subnets according to voltage levels of 220 kV.The subnets are connected by means of boundary nodes,and the partition model is solved using the improved approximate Newton direction method,which achieves complete dynamic decoupling simply by exchanging boundary variables between the main network and the subnets.A largescale power grid thus is decomposed into many subnets,making the solution of the problem simpler and faster while helping to protect the information of individual subnets.The system is tested for correctness and effectiveness of the proposed model,and the results obtained are matched in real-time.Finally,the algorithm is seen to have good convergence while improving calculation speed.

关 键 词：Improved approximate Newton direction method large-scale power network node injecting current method optimal power flow voltage grading and network partition 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]