【作者】 韩平；

【导师】 刘文颖；

【作者基本信息】 华北电力大学（北京） ， 电力系统及其自动化， 2009， 硕士

【摘要】 调度员潮流模块在能量管理系统分析软件中处于核心地位,它不仅是分析软件的必备功能,而且是一些其他功能的基础。本文以工程实践为出发点,以提高计算速度、提高计算精度、改善收敛性为目标,对在线潮流计算提出了三点实用化改进:(1)考虑到潮流计算速度的要求,提出了一种考虑节点类型因素的节点优化方法。(2)针对实际系统中并列母线存在电压差的问题,为了提高计算精度,提出在潮流计算中使用小阻抗支路代替零支路作为母联开关刀闸组的模型,并给出其阻抗值的计算方法。(3)针对含小阻抗支路电网,提出使用双精度类型变量,采用两次高斯赛德尔法选取初值后再使用牛顿拉夫逊法的方法,解决了含小阻抗支路电网潮流计算的收敛性问题。最后,将本文提出的三点改进应用于定西电网实际算例,结果表明,其简单易行,可靠有效,对于解决实际工程中出现的问题具有很好的借鉴性。更多还原

【Abstract】 The on-line load flow calculation is in the core position in the energy management system analysis software.It is not the basic function of the analysis software but also the basis of other funtions.Based on the engineering practice,in order to improve the calculation speed and precision,three practical improvements are advanced in the field of on-line load flow calculation in the paper:(1)In order to improve the speed of load flow calculation,we propose a modified method which is using different methods to deal with different type of nodes.(2)In the practical system,there is voltage difference in the coordinate bus.In order to improve the calculation precision,a model which is using small impedance branch instead of zero impedance branch as breaker which connects two buses is advanced and the impedance calculation method is also presented.(3)It is found that using Gauss-Seidel method twice and then using Newton-Raphson method can solve the convergence problem in the process of the load flow method being applied to dealing with the case of the small impedance branches.After apllied the improvements to DingXi District grid,it is proved that the method is easy and of great credibility and validity.It can be used for reference in the practical projects.更多还原