Introduction The quality of educati

简介通过使用计算机辅助的教育工具，可以提高理论和实际电气工程学科的教育质量。1–4通过一些计算机程序，可以使学生难以计算的主题变得更加直观。5–7辅助教学方法增加了学生与教育者之间的互动，并增强了学生的学习过程。8电机领域包括几种电机的设计，分析和控制。其中，电力系统中最常见的是三相同步电机。它们作为发电机运行，被广泛用于发电，当用作同步电动机时，也可以在大型电动机驱动系统中满足它们的要求。同步电机表现出非常复杂的动态行为。反过来，此行为会影响机器所连接的整个电源系统。为了分析电力系统的不同问题，需要一个合适的同步电机数学模型。9同步电机的基本理论和相应的性能可以在文献中找到。但是，它们的建模和分析并不总是一件容易的事。如今，有许多商业软件解决方案可用于对相关结果进行仿真，控制和科学可视化。PowerWorld Simulator，SimPow，PSAT，Power Factory只是用于此类任务的一些商用范例，例如可以在Kaur和Kumar中找到。10尽管有如此之多，但上述工具的“学习使用”比率仍然很低，这对于短期（学期型）研究是一个缺点，并且每天实验室使用中几乎都禁止相应的高额购买和维护成本。关于可用于或多或少准确地描述同步电机的微分方程的数量，同步电机的数学建模可以使用不同阶的模型，即二阶，三阶，五阶和七阶模型（例如，带有或不带有激励器） ，带有或不带有阻尼绕组等）。Li等人11通过选择Visual C提供的改进的Euler方法，使用了三阶数学模型来创建完整的仿真程序。然后，该三阶数学模型用于分析和比较测试的仿真结果。此外，Hassan12和Spoljaric等13使用了三阶和七阶数学模型，使用Matlab软件，特别是通过名为SimPowerSystems的特殊工具箱。Dehghani和Nikravesh14还提出了一个三阶模型，用于同步发电机的非线性状态空间模型识别。在这种方法中，使用了机器参数的理论关系以及Prony方法，以找到系统的状态空间模型，该模型可进一步用于控制器设计和稳定性测试。继续进行文献综述，可以发现已经使用了非特定的仿真软件来对结果进行控制和科学可视化。到目前为止，使用最广泛的一些工具包括：Authorware，Labtech，Visual C，Visual Basic，LabVIEW和Matlab / Simulink。在上述软件包中，Matlab和基础Simulink工具包是几个相关的主要仿真工具。<br>2国际电气工程教育杂志0（0）<br>15,16以及National Instruments提供的LabVIEW。17,18LabVIEW提供的功能包括从现实世界中获取数据，以框图形式进行处理以及将结果轻松传输到接口输出。19， 20这些功能对于希望在现实世界中进行交互和控制事件的工程师非常有用。基于以上所述，LabVIEW在本工作中用作强大的仿真和可视化软件。在LabVIEW环境中开发的应用程序称为“虚拟仪器（VI）”。21由于其图形化环境，与其他仿真程序相比，在LabVIEW中开发的仿真程序需要更短的开发时间。这是它成为创建新设备原型的工业标准的另一个原因。22，23这项工作的目的是激发学生对高级电机主题的兴趣，并激发他们在同步电机动态稳定性研究中进行自己的研究。本文介绍的教学工具既可以通过基于解析方程的迭代过程来涉及机器的运行特性，又可以通过计算机辅助教学工具对该行为进行验证。

使用计算机辅助教育工具提高理论与实用电气工程科目的教育质量。，分析和控制几种类型的电机。其中，电力系统中最常见的是三相同步机。作为发电机运行，它们广泛用于发电，在充当同步电机时，也可以在大型电机驱动系统中满足。同步机器表现出相当复杂的动态行为。反过来，这种行为会影响机器连接到的整个电力系统。为了分析电力系统的各种问题，需要一个合适的同步机数学模型。然而，他们的建模和分析并不总是一件容易的事。现在有许多商业软件解决方案可用于模拟、控制和科学可视化相关结果。PowerWorld 模拟器、SimPow、PSAT、电力工厂只是此类任务的一些市售范例，例如，在 Kaur 和 Kumar.10 中可以发现，尽管如此多，上述工具仍具有较低的"学习到使用"比率，这是短期（学期类型）研究的缺点，而且几乎禁止在每天的实验室使用中支付相应的高购买和维护成本。同步机器的数学建模可以使用不同顺序的模型，即第二、第三、第五和第七阶模型，即可用于或多或少准确地描述同步机器的微分方程数（例如，有或没有激发器，有或没有阻尼器绕组等）。Li等人使用三阶数学模型，通过选择 Visual C 提供的改进的 Euler 方法创建完整的仿真程序。然后，利用三阶数学模型分析和比较试验的仿真结果。此外，Hassan12和Spoljaric等人等人使用第三和第七阶的数学模型，使用Matlab软件，特别是通过一个名为SimPowerSystems的特殊工具箱。Dehghani和Nikravesh14还提出了第三阶模型，用于同步发生器的非线性状态空间模型识别。该方法采用机器参数的理论关系和Prony方法，查找系统的状态空间模型，进一步用于控制器设计和稳定性测试。继续文献回顾，看非具体 si

Introduction The quality of education in theoretical and practical electrical engineering subjects is increased by using computer-aided educational tools.1–4 Topics which are difficult to be computed by students became more visual with the aid of some computer programs.5–7 Computer-aided teaching approach has increased the interaction between student and educator and enhanced the learning process of students.8 The field of electrical machines includes the design, analysis and control of several types of electrical machines. Among them, the most common in power systems are the three-phase synchronous machines. Operating as generators they are widely used for power generation and they can also be met in large motor drive systems when acting as synchronous motors. A synchronous machine exhibits quite complex dynamic behaviour. In turn, this behaviour influences on the entire power system to which the machine is connected. In order to analyse different problems of the power system, a suitable mathematical model of the synchronous machine is needed.9 The basic theory and the corresponding performance of synchronous machines can be found widely in literature. Their modelling and analysis, however, is not always an easy task. There are many commercially software solutions available nowadays for simulation, control and scientific visualization of the relevant results. PowerWorld Simulator, SimPow, PSAT, Power Factory are only some of commercially available paradigms for this kind of tasks, e.g. as it can be found in Kaur and Kumar.10 Despite this plethora, the aforementioned tools present a low “learning to using” ratio, which is a drawback for short (semester type) studies and also the corresponding high purchasing and maintenance cost is almost prohibited for every day laboratory use. Mathematical modelling of a synchronous machine may use models of different orders, i.e. second, third, fifth and seventh order models, regarding the number of the differential equations which can be used to describe the synchronous machine more or less accurately (e.g. with or without exciter, with or without damper windings, etc.). Li et al.11 used a third-order mathematical model, by choosing the improved Euler method, provided by Visual C to create a complete simulation program. Then, this third-order mathematical model is used to analyse and compare the simulation results of the tests. Also, Hassan12 and Spoljaric et al.13 used the mathematical model of third and seventh order, using Matlab software and particularly through a special toolbox called SimPowerSystems. A third order model is also proposed by Dehghani and Nikravesh14 for nonlinear state space model identification for synchronous generators. In this method, theoretical relations of machine parameters are used as well as the Prony method, to find the state space model of the system, which can be further used for controller design and stability tests. Continuing the literature review, it is seen that non-specific simulation software for control and scientific visualization of the results have been used. Some of the most widely used so far are: Authorware, Labtech, Visual C, Visual Basic, LabVIEW and Matlab/Simulink. From the above packages, Matlab and the underlying Simulink toolkit is the main simulation tool in several of relevant2 International Journal of Electrical Engineering Education 0(0)works,15,16 as well as LabVIEW by National Instruments.17,18 Among the capabilities provided by LabVIEW is the data acquisition from the real world, their processing in the block diagram form and the easy result transfer to the interface outputs.19,20 These capabilities are very useful for engineers desiring to interact and control events in the real-world. Based on the above, LabVIEW is used in this work as a powerful software for simulations and visualizations. The applications developed in the LabVIEW’s environment are called “virtual instruments (VIs)”.21 Due to its graphical environment, simulation programs developed in LabVIEW need smaller development time compared to other simulation programs. This is another reason for which it has become an industrial standard in creating new device prototypes.22,23 The aim of this work is towards the stimulation of students’ interest in advanced electrical machines topics and to motivate them to do their own research in synchronous machine dynamic stability studies. The teaching tool presented in this paper involves both the machine operational characteristics by means of an iterative procedure based on analytical equations and the verification of this behaviour through a computer-aided educational tool.<br>