【作者】 林建新；

【导师】 王大光； 陈树棠；

【作者基本信息】 福州大学 ， 电力系统及其自动化， 2006， 硕士

【摘要】 电力系统模型作为电力系统分析的基础,也是电力系统战略发展、规划设计、调度运行、试验研究等工作的基础。因此福建省对主要机组励磁系统建模研究,为提高系统仿真准确度提供励磁模型参数。本文研究总结了一种分析计算励磁系统模型参数对动态仿真影响的方法,以对所建模型参数进行校核。本文研究也是励磁建模科研项目的重要课题。本文应用MATALAB编程环境进行了编程。建立包含发电机、励磁系统、调速系统模型等非线性微分方程,并联合网络方程建立电力系统模型方程。根据电力系统的结构和运行参数、发电机组及其励磁系统、调速系统模型和参数数据,建立潮流方程,用PQ分解法,算出电力系统的潮流; 根据潮流结果计算出电力系统状态变量初始值。对模型方程组进行线性化,得到线性微分-代数方程的状态矩阵A; 使用QR法,计算状态矩阵A的特征值及特征值对发电机励磁系统参数灵敏度。在IEEE三机九节点电力系统和保留福州地区电网的等值福建电力系统中利用本文的方法进行了例题分析,获得特征值对系统中各台发电机励磁系统的若干个参数的灵敏度。并利用BPA程序在时域进行了电力系统模型参数对动态仿真影响的仿真校核,得到了验证。更多还原

【Abstract】 Models of power system are very important for power system analysis, and it is also the basic of power system strategy developing, program designing, attemper operating and experiment researching. Fujian electric power company have a research on modeling of it’s main generator excitation and governing system. The paper puts forward a method of analyzing and computing the excitation system parameters’ effects on dynamic simulation, and the method can be used to verify the parameters of the model. The study of this paper is the important component of the excition system modeling research. The paper designs MATALAB program. The nonlinear differential equation which models generator, excitation system and governing system is established to make power system with network differential equation. Firstly, the flow equation is establish according to the structure and parameters of power system, the model and parameters of generator and its excition governing system. Secondly, the PQ decomposition method is used to calculate the power flow. Thirdly, the initial values of state variable are calculated on the basis of power flow. To obtain state matrix A of linear differential algebra equation, the equation set of the model, then the eigenvalue of state matrix A and its effection on sensitivity of excition system are calculated by QR method. The method proposed in the paper is used to analyze IEEE 9-node system and FuJian power system and acquire eigenvalue’s sensitivity of generator excition system. The validity of this method is verified by simulation in BPA program.更多还原