变步长摄动法的电力系统暂态稳定计算研究与软件开发

发布时间：2018-02-13 03:45

本文关键词： 电力系统暂态稳定摄动法变步长 GUI　出处：《广西大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着我国电力建设发展迅速,特高压交流、直流系统不断完善联网,电网络构架逐渐扩大,互相之间的联系加强与复杂化是必然的趋势。电网的稳定性问题越来越突出。近年来的大停电事件也给了我们深刻的警醒。暂态稳定性分析计算是电力系统三大经典计算之一,也是电力系统规划、设计、调度运行与控制必不可少的一项重要的计算任务。因此,电力系统暂态稳定计算研究具有重要的实际意义。电力系统暂态稳定数值计算,是在时域内求解系统的微分代数方程组。本文针对暂态稳定数值计算方法做了如下的研究工作:1、暂态稳定数值计算的速度和精度一直是研究的重点问题。本文针对提高数值计算的仿真速度方面,提出了一种基于变步长方法和摄动法相结合的电力系统暂态稳定计算仿真算法,并且提出了相应的变步长修正策略。该算法的特点包括:(1)用摄动法代替传统的牛顿迭代法求解电力系统的微分代数方程,摄动法和传统的牛顿迭代法相比具有相同的计算精度,在求解时省去了大量的迭代计算,减小计算量,提高仿真速度。(2)通过变步长的方法,在摄动法求解微分代数方程的框架下,根据局部误差理论与预估校正变步长的计算格式,对步长进行动态调整,在保证计算精度的前提下,仿真的步数减少,与定步长相比进一步提高了仿真速度。变步长摄动法理论推导清晰明确、计算过程简明。仿真算例结果证明,所提出的基于变步长摄动法的电力系统暂态稳定计算是有效的。2、在 MATLAB 图形用户界面(Graphical User Interface,GUI)工作平台上,设计了软件主界面并嵌入后台程序,开发出一个电力系统暂态稳定计算软件-电力系统暂态稳定计算V1.0。该软件集成了多种发电机模型,多种暂态稳定数值计算方法,包括本文第2章介绍的传统算法和第3、4章的摄动法和变步长摄动法。它的主要功能有:(1)供用户选择不同的仿真算例;(2)用户可以对发电机模型、计算方法、故障类型、仿真时间进行选择与设置;(3)通过输出界面直观的显示发电机机端电压随时间变化的曲线和发电机的摇摆曲线。该软件直观、简洁、形象,方便用户使用,并且它是一个开源软件,也可以供用户不断完善和增加其它功能模块。
[Abstract]:With the rapid development of China's electric power construction, UHV AC DC system, and constantly improve the network, electric network architecture is gradually expanding, and strengthen the connection between the complex is an inevitable trend. The stability of the power grid is becoming more and more serious. In recent years the blackout has given us a profound wake-up call. Transient stability analysis is one of the three classic calculation of power system, but also the power system planning, design, an important task of calculating essential operation and control scheduling. Therefore, the power system transient stability calculation has important practical significance. The numerical calculation of transient stability of power system, is solved in time domain system of differential algebraic equations in this paper. Transient stability numerical calculation method to do the research work as follows: 1. The speed and accuracy of the numerical calculation of transient stability has been the focus of the study in this paper. To improve the simulation speed of numerical calculation, proposed a simulation algorithm of variable step size method and perturbation method based on the combination of the transient stability of power system, and put forward the corresponding correction variable step strategy. The characteristics of the algorithm include: (1) Newton iteration method for solving differential algebraic equations with perturbation method instead of power system the traditional perturbation method and compared with the traditional Newton iteration with the same precision, when solving the calculation eliminates the need for a large number of iterations, reduce the amount of computation and improve the simulation speed. (2) through the method of variable step perturbation method, in the framework of differential algebraic equations, based on the local error theory and the variable step predictor corrector scheme, dynamic adjustment of the step in ensuring the accuracy of the simulation, the number of steps to reduce, and step further than to improve the simulation speed. Variable step length perturbation theory A clear, concise calculation process. The simulation results prove that the proposed calculation of power system transient stability perturbation method based on step is effective in.2, MATLAB graphical user interface (Graphical User Interface, GUI) on the working platform, the design of the main interface of software and embedded into the background program, developed a power system transient stability calculation software of power system transient stability calculation software V1.0. the integration of a variety of generator model, numerical calculation method of transient stability, including the traditional algorithm in the second chapter and chapter 3,4 of the perturbation method and the variable step perturbation method. Its main features are: (1) for the user to choose different a simulation example; (2) the user can of generator model, calculation method, fault type, the simulation time to choose and set; (3) through the output interface of the display generator terminal voltage changes with time. The rocking curve of line and generator. The software is intuitive, concise, image and convenient for users to use, and it is an open source software, and it can also continuously improve and add other functional modules to users.

【学位授予单位】：广西大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM712;TP311.52

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