文档介绍：毕业设计(论文)
题目基于MATLAB的变压器运行特性分析
院系
电气与电子工程学院
专业班级

学生姓名

指导教师

摘要
随着变压器技术的进步,传统仿真已经受到了很大的限制。并且当下要推动变压器技术的发展,已经不能再依靠传统仿真。因此,对于变压器的计算机仿真技术势在必行。
本为通过MATLAB软件,对变压器的运行特性进行了仿真。主要仿真的内容包括:饱和对励磁电流的影响、磁滞对励磁电流的影响、空载合闸和突发短路时的过电流现象。仿真所用到的方法为数值计算方法,通过插值的方法实现了对不饱和区磁化曲线和磁滞回线的拟合。饱和区的磁化曲线和磁滞回线用直线代替,用到了分段化的方法。文中对变压器动态特性的仿真采用了龙格库塔算法,为了保证仿真结果的准确可靠,采用了经典的四阶龙格库塔公式。仿真时,为了使得最终结果便于分析,文中数据多采用标幺值来表示,基值为各个稳态电气量的峰值。文中给出了各种运行特性的仿真结果图,并且结合理论对其做了简单的分析,验证了仿真方法的准确性和可行性。
关键词:变压器,铁芯饱和,铁芯磁滞,励磁涌流,MATLAB仿真分析
ABSTRACT
With the progress of transformer technology, the traditional simulation has been greatly limited. And now to promote the development of transformer technology, can no longer rely on the traditional simulation. Therefore, computer simulation technology of transformer is imperative.
The operating characteristic of transformer simulation through the MATLAB soft is discussed in this paper. The main content includes: the effects of saturation on the excitation current, effect of hysteresis of the excitation current, the excess current phenomenon of no-load closing and sudden short-circuit. Simulation method used for numerical calculation method, finish the fitting curve of the unsaturated ization curve and the unsaturated hysteresis loop through the method of interpolation. ization curve and hysteresis loop of the saturated region is fitted by linearization technology. In order to ensure the accuracy and reliability of simulation results, Simulation of dynamic characteristics of transformer using four order Runge-Kutta algorithm. In order to make the final results for analysis, the date is represented of per-unit, as the peck of each steady state date of base value. This paper gives the simulation results of operating characteristics of the graph, and has made the simple analysis to it according to the theory to verify the accuracy and feasibility of the simulation method.
KEY WORDS: Transformer, Core saturation, Core hysteresis, Inrush current, MATLAB Simulation analysis