Application independent interactive environment for power systemseducation

The authors present an interactive software package for the simulation of power system stability studies. The package is intended as a supplementary tool for the teaching of power system stability courses at the graduate level. The development of the package was done exclusively for IBM-PC and compatible computers. The hardware mainly requires VGA display and 640 kbyte of memory. Professional libraries used for the development of the package include Meta Windows, graphics Menu, and Object Professional. The authors describe the methods used for the integration of various analysis programs and the organization of the data and information pertinent to a system study     

A PC based software package for the equal area criterion of powersystem transient stability

This paper presents features and applications of an interactive graphical PC (DOS based) software package for the comprehension of transient stability using the equal area criterion method. The software is specifically useful for senior level undergraduate and first year graduate students in power system analysis courses. Utility engineers working with large-scale power systems can learn some basic concepts of transient stability by simulating the single machine infinite bus power system. A distinctive feature of this package is the user-friendly method for problem definition. Problems are defined by selecting options from menus without typical editor-like entry approach, used in other mathematical software, which normally have their own strict syntax     

SINGLE MACHINE INFINITE BUS POWER SYSTEM TRANSIENT STABILITY: SOFTWARE IMPLEMENTATION

ABSTRACT

This paper presents an interactive software implementation of the single machine, infinite bus power system. All the methods of analysis for the power system transient stability have been integrated in the software. The software is specifically useful for power engineers to comprehend the transient stability methods. A distinctive feature of this package is the user-friendly method for problem definition. Problems are defined by selecting options from menus without typical editor-like entry approach, as used in other mathematical software, which normally have their own strict syntax. On-line graphics capability, to enhance the comprehension of concepts, have been incorporated.     

A Windows-based interactive and graphic package for the educationand training of power system analysis and operation

This paper presents a Windows-based interactive graphic package developed by the authors for the education and training of the power system modeling, analysis and operation with a user-friendly graphical user interface (GUI) and visual database management system (VDBMS). To achieve this goal, the package is designed to have following features: a graphic editor to visually edit the power system diagram; Windows-based power system database to interactively manage the data; graphic representations; animation; and interrupting schemes. The application programs in this package include the power flow calculation, transient stability analysis, fault analysis, economic dispatch and automatic load-frequency control. This package may be useful for educational and training purposes     

Powerful software to learn by [power systems CAI]

Many students have trouble understanding the concepts and mastering the analytical skills required in their first power systems course. This becomes apparent in subsequent courses when they falter in applying those concepts and skills. They may lose interest in power systems, and may drop out. Our overall project was aimed at developing educational facilities with an integrated laboratory for a power systems course. To this end, a software package called PowerGraf was developed to help students learn and to make the subject more interesting. It is an interactive and comprehensive software package for supplementing what is learned in the classroom, the laboratory and in the student's self-study. It is also an excellent demonstration tool. The package is truly designed for students with little understanding of power systems     

实用的可视化电力系统软件的开发与应用

随着电力系统规模的不断扩大．运用手算方法解决电力系统计算已不可能。传统的编程技术大多是基于文本操作界面的，其计算复杂且结果不直观。为此利用MATLAB与Visual C 计算机技术开发了电力系统的可视化软件。它包括电力系统短路电流计算、潮流计算、稳定分析计算等电力系统常用的13个程序．具有较强的交互性、可视性和可开发性．具有强大的矩阵处理功能和绘图功能。此软件已应用于高等院校的教学中．通过计算机软件对电力系统的模拟，加深了学生对课程内容的理解．提高了学生的计算机应用能力．是有效的计算机辅助教学手段。此软件也可用于电力系统相关部门、在职人员培训及科研人员科技开发工作中。     

电力系统CAI多媒体软件的开发与应用

以电力系统的教学为研究对象,利用计算机技术开发了电力系统潮流、短路、稳定分析计算演示软件包。叙述了利用计算机交互及多媒体技术实现计算机辅助教学（CAI）教学的方法及过程。通过算例的测试,表明此软件系统具有运行稳定、结果准确、使用方便、界面友好等优点,可用于高等院校教学、在职人员培训及相关科研工作。     

INTEGRATED SOFTWARE FOR OPTIMAL DIRECTIONAL OVERCURRENT RELAY COORDINATION

ABSTRACT

This paper reports the development of fully integrated software for the optimal directional overcurrent relay coordination of interconnected power systems. Different software packages like load flow analysis, fault analysis, determination of backup/primary relay pairs, main relay coordination program, etc. have been integrated. The program could be run as an interactive package or as an off-line package, depending upon the choice of the user. The information needed for the coordination is stored and used by the software. No data base management packages are needed to manage huge data generated by the program. The software uses an efficient method to generate, store and retrieve the data as per the requirements of the coordination. In the Interactive mode, the information about the coordination time interval, range of the relay settings, limits to the maximum and minimum time of operation of the relays, etc., are supplied. All other relevant data needed for coordination are generated by the software package itself. The usage of the program is illustrated by a case study involving the SPC 26-bus power system.     

Computer aided instruction of rotating electric machines viaanimated graphics

A menu-driven interactive graphics software package has been developed for use as an instructional aid for the electric machines course in the electrical engineering curriculum. The main purpose of this tool is to give the students a clearer understanding of the basics of the operation of rotating electric machines. The animation program was developed for displaying live and rotating diagrams depicting different modes of operation of synchronous generators. Different parts are identified with different colors. The interaction of the magnetic poles on the stator and on the rotor, and the relative spatial positions and time variations of the magnetic and electric quantities are demonstrated through moving images. The software features are described     

A novel approach for interactive protection system simulation

This paper presents a new approach for interactive power network protection system simulation. In the new approach, power system transients are simulated using an Electromagnetic Transients Program (EMTP), while protective relays can be modeled using any high-level language or commercially available software package, such as MATLAB. The interactions between power systems and relays are implemented by using an “interaction buffer”. Using this technique, the EMTP can be run in single-step, multiple-step or mixed mode. This new approach makes the protection system simulation quite efficient, flexible and accurate     

直流励磁发电机组励磁系统参数测试建模及仿真校核

通过励磁系统的现场试验,采用电力系统分析综合程序PSASP中的励磁系统模型,得出可用于电网稳定计算的柘溪水电厂6号发电机组励磁系统的实测模型和参数。文章总结了使用PSASP进行励磁系统参数仿真的步骤,并给出试验数据与仿真数据的对比结果,结果验证了上述方法的正确性和实用性。     

基于PSASP的电力系统机辅分析软件的开发及其可视化实现

可视化技术可以将电力系统运行状态的大量信息以直观、简捷的方式显示给系统运行人员。电力系统综合分析程序(PSASP)以强大的计算仿真功能被广大研究人员所采用。以PSASP的计算功能为内核,开发了包含建模可视化、输出分析可视化的电力系统机辅分析软件(CAA)。本软件的仿真计算结果更符合分析人员的思维习惯,实现了基于轨迹分析法的暂态稳定可视化评估;同时具备元件模型参数自动循环调整的功能,可利用差分形式研究参数的轨迹灵敏度;可视化表现方式不仅具有三维显示,同时还可与MATLAB相链接实现多样化的表现方式。算例验证了各项功能的正确性和有效性,为电力系统的运行分析及根据实测轨迹调整参数提供有力的工具。     

电力系统割集空间静态电压稳定域的可视化及实现

安全域的可视化可以提高电力系统的可观测性,帮助调度人员快速估计系统当前的安全状态,针对应采取的预防性措施做出正确的预断。介绍了静态电压稳定域可视化系统的理论与数值仿真依据,以及在河南电网调度通信中心能量管理系统(EMS)上的可视化软件的开发情况。该软件包以定时获取SCADA实时量测数据为基础,快速计算关键断面在割集功率空间中的潮流传输极限边界,并采用OpenGL 3D图形开发技术首次实现了电力系统稳定域在EMS上的可视化,为运行调度人员提供了系统电压稳定性测度的直观显示。由于避免了大规模的连续潮流计算,每个计算周期在几秒至几分钟内(由网络规模大小决定)即可完成,因此在线电压稳定性监视功能得以实现。软件包在Digital UNIX操作平台上开发,对多种UNIX系统具有很好的兼容性和可移植性,为在新一代EMS中嵌入该功能模块奠定了良好的基础。     

CAL programs developed in advanced programming environments forteaching electrical engineering

Following the need to provide profound understanding of fundamental concepts in electrical engineering a number of computer assisted learning (CAL) programs have been developed in the Department of Electronic and Electrical Engineering at Surrey, UK, to aid teaching of signal analysis, electromagnetic field theory, engineering mathematics, power electronics and telecommunications. They all run on personal computers (Apple Macintosh or IBM PC), except for the telecommunications tutorials which are designed for SUN workstations. The programming environment used is cT for personal computers and the advanced simulation software package SPW for workstations. The course material is designed to meet the requirements of a modular syllabus structure. The software is developed by final year undergraduates for pedagogical reasons with the emphasis on animation, real-time calculations, interactiveness and self-assessment     

基于PSASP的直流系统用户自定义建模

针对大规模交直流电力系统机电暂态仿真时采用程序缺省的直流输电模型不能有效描述实际直流输电特性的问题,以实际直流系统为参考,利用PSASP用户自定义建模环境,采用注入功率法建立高压直流用户自定义模型。此自定义直流模型由潮流模型和稳定模型2部分组成,稳定模型涵盖实际直流控制器的主要控制功能模型以及变压器分接头控制、无功控制等辅助功能模型。以EPRI-7节点系统为例,研究在不同工作状态下自定义直流模型系统的特性,仿真结果证明了模型的合理性。     

基于拼图方式的电力电子电机系统通用仿真软件包

在综合分析,研究了国内外电力电子仿真软件的基础上,结合课题的实际应用背景和现有的工作条件,开发了基于拼图方式的电力电子电机系统通用仿真软件包。     

电力系统分析综合程序的用户自定义模型

随着电力系统和电力电子技术、控制技术的发展，各种新型系统元件和新的控制功能不断在电力系统投入使用，电力系统分析程序有必要而且必须采用用户自定义模型方法来模拟这些元件和功能。介绍了电力系统分析综合程序的用户自定义模型的组成、原理和建模方法，并以UFV-2K型电网安全自动装置过电流切负荷功能为例，说明如何建立用户自定义模型。