基于扩展潮流的输电断面最大传输能力  

The total transfer capability of cross-section of transmission line based on expanded power flow

作　　者：王艳玲[1,2] 韩学山[1] 周晓峰[2] 

机构地区：[1]山东大学电气工程学院,山东济南250061 [2]威海职业学院机电系,山东威海264210

出　　处：《电力系统保护与控制》2011年第13期20-24,31,共6页Power System Protection and Control

基　　金：国家自然科学基金资助项目(50377021;50677036)~~

摘　　要：提出了基于扩展潮流模型计算系统输电断面最大输电能力的新思路。在扩展潮流模型中考虑了调速器和励磁系统等动态元件对系统输电能力的影响,从而打破了在以往输电能力求解过程中发电机端电压维持不变的假设,使计算结果更符合实际。建立了基于扩展最优潮流的最大输电能力计算模型,采用线性规划法进行求解,求解过程中采用了基于信赖域思想的整体步长调整与基于曲率的单变量步长调整相结合的步长调整策略。在New England 39节点算例系统中验证了模型和计算方法的有效性。A novel idea based on expended power flow model is proposed for calculating the total transfer capability（TTC） of system transmission cross-section. In expended power flow model,the influence of speed governor,excitation system and other dynamic devices on system transmission capacity is considered,thus breaking the assumption of constant terminal voltage of generators in the traditional TTC calulation,which makes the results more realistic. In this paper,a mathematical model based on expended power flow is established for the calculation of TTC. The model is solved by linear programming method. During the process of solving,the overall step adjustment based on trust region method and the single step adjustment based on curvature are combined. At last,the feasibility and effectiveness of the model and the method are testified by New England 39-nodes system.

关 键 词：最大输电能力(TTC) 扩展潮流 最优潮流 线性规划 

分 类 号：TM744[电气工程—电力系统及自动化]