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关键词： 电力系统潮流   分析技术   最优潮流   专题   简介   电力系统分析   可视化技术   组成部分  

摘要： 电力系统潮流和最优潮流分析技术是现代电力系统分析的重要组成部分.本专题重点讨论近年来电力系统潮流和最优潮流分析技术的新进展:新方法,新元件的建模,新应用和可视化技术.

关键词： continuation power flow   GNU/Octave   Matlab   optimal power flow   power flow   smaill-signal stability analysis   time-domain simulation  

摘要： This paper describes the Power System Analysis Toolbox (PSAT), an open source Matlab and GNU/Octave-based software package for analysis and design of small to medium size electric power systems. PSAT includes power flow, continuation power flow, optimal power flow, small-signal stability analysis, and time-domain simulation, as well as several static and dynamic models, including nonconventional loads, synchronous and asynchronous machines, regulators, and FACTS. PSAT is also provided with a complete set of user-friendly graphical interfaces and a Simulink-based editor of one-line network diagrams. Basic features, algorithms, and a variety of case studies are presented in this paper to illustrate the capabilities of the presented tool and its suitability for educational and research purposes.

关键词： 负荷模型   前馈网络   负荷建模   电力系统分析   参数辨识   静态模型   仿真   简化   算法   自适应  

摘要： 负荷的精确建模在电力系统分析中的重要性已被电力工作者所认识到。文中在对自适应的三层前馈网络(ABP)进行修改、简化后,得到简化(或线性)前馈网络(LBP)。并结合现场试验和仿真数据,对用线性前馈网络和辅助变量法对负荷建模的精度进行了比较。把线性前馈网络作为一种算法,对负荷动态模型即差分方程的参数进行了辨识。同时,应用 LBP 对负荷静态模型即幂函数和多项式模型的参数进行了辨识,还提出基于人工神经网络的负荷动静模型同时辨识法。

关键词： 系统分析   仿真模型   仿真软件  

摘要： 介绍MATLAB软件在电力系统中应用,以及MATLAB环境下的动态仿真工具Simulink和电力系统工具箱PSB(PowerSystemBlockset)的功能和特点;并以MATLAB为仿真平台进行电力系统建模和动态仿真分析。实践表明,MATLAB是进行电力系统建模和仿真分析的强大实用工具。

关键词： 潮流计算   Authorware   制作   电力系统分析   计算机算法   CAI课件   计算机屏幕  

摘要： 针对《电力系统分析》课程潮流计算的计算机算法部分公式繁多、矩阵庞大、传统的版书教学费时费力又显抽象的状况,采用Authorware编写CAI课件,用灵活变化的计算机屏幕代替黑板,以减轻教师上课负担,并使学生更好地掌握该章节的内容.

关键词： PSS/E   PTI   电力系统分析软件   动态仿真  

摘要： 介绍了PSS/E-29的基本功能及高级功能,与国内BPA程序比较,2种软件的原始数据均基于文本格式 的填卡式输入,但前者基于自由书写格式,原始数据输入工作量大为减轻,且其动态模型库更为全面,更适应电力 系统新技术的发展。仿真一算例系统的结果表明它提供的模型可靠,结果可信。

ISBN: (纸本)7111159160

关键词： Maximum Power Point Tracking   Current Sharing   Digital Control  

摘要： Solar power is becoming ever more popular in a variety of applications. It is particularly attractive because of its abundance, renewability, and environment friendliness. Solar powered spacecraft systems have ever-expanding loads with stringent power regulation specifications. Moreover, they require a light and compact design of their power system. These constraints make the optimization of power harvest from solar arrays a critical task. Florida Power Electronics Center (FPEC) at UCF set to develop a modular fault-tolerant power system architecture for space applications. This architecture provides a number of very attractive features including Maximum Power Point Tracking (MPPT) and uniform power stress distribution across the system. MPPT is a control technique that leads the system to operate its solar sources at the point where they provide maximum power. This point constantly moves following changes in ambient operating conditions. A digital controller is setup to locate it in real time while optimizing other operating parameters. This control scheme can increase the energy yield of the system by up to 45%, and thus significantly reduces the size and weight of the designed system. The modularity of the system makes it easy to prototype and expand. It boosts its reliability and allows on-line reconfiguration and maintenance, thus reducing down-time upon faults. This thesis targets the analysis and optimization of this architecture. A new modeling technique is introduced for MPPT in practical environments, and a novel digital power stress distribution scheme is proposed in order to properly distribute peak and thermal stress and improve reliability. A 2kW four-channel prototype of the system was built and tested. Experimental results confirm the theoretical improvements, and promise great success in the field.

ISBN: (纸本)7508320638

ISBN: (纸本)7030147278