220KV辐射状电网潮流计算及变电所主接线设计-电气与信息工程本科毕业设计说明书.doc

本科毕业设计说明书 220KV辐射状电网潮流计算及变电所主接线设计220KV RADIATION GRID TIDAL CURRENT CALCULATION AND THE MAIN WIRING DESIGN OF TRANSFORMER 学院（部）： 电气与信息工程学院 专业班级： 电气13-2 学生姓名： xxx 指导教师： xxx讲师 年 月 日 摘要 220KV辐射状电网接线属于无备用式又称开式网络系统，由一条电源线路向用户供电，又称为220KV放射式网络。而220KV辐射状电网的潮流计算是研究电力系统稳态运行情况的一种最基本的电气计算。在电力系统的规划方案和运行方式的研究中，都必须需要进行潮流计算以对比规划供电方案和运行方式的经济性、可靠性和可行性。同时为了达到实时监控电力系统的运行状态，也必须要进行大量的而且迅速的潮流计算。所以，研究220KV辐射状电网的潮流计算极其重要并且非常有实际意义。 本文选择220KV辐射状电网潮流计算及变电所主接线设计为主攻方向，首先分析220KV辐射状电网的特点，深入研究直角坐标下的牛顿法潮流计算的特性和理论。结合220KV辐射状电网的特点，通过直角坐标下的牛顿法进行潮流计算。然后结合现代电力系统的特点和我国目前的经济状况，深入的研究主接线的可靠性以及主接线方式的选择，对变电所主接线的设计步骤进行探讨。 通过毕设，深刻理解了潮流计算和主接线的详细过程，学习了潮流计算的计算机算法和程序编写等，体会到了毕业设计的辛苦和同学一起学习的快乐。 关键字：潮流计算，牛顿直角坐标法，一次主接线设计ABSTRACT The 220KV radiation grid connection is a non-backup and open network system, powered by a power line to the user, also known as 220KV radiation network .The current calculation of the 220KV radiation grid is a basic electrical calculation for the steady state performance of the power system .In order to monitor the running state of the power system in real time, there is also a large and rapid flow calculation .So, the trend calculation of 220KV radiation grid is extremely important and very practical. This paper choose 220KV power flow calculation and radial grid substation main wiring design as the main direction, the first analysis of the characteristics of the 220KV radial grid, in-depth study of Newtons method in the cartesian coordinates the characteristics of power flow calculation and theory .Combining the characteristics of the 220KV radiation grid, the trend is calculated by the Newtonian method of rectangular coordinates .Then according to the characteristics of the modern electric power system and the current economic situation in our country, the reliability of the in-depth research of main electric connection as well as the choice of the main connection mode, discusses substation main wiring desig