针对配电网故障定位系统研究和试验检测存在的问题,对配电网动态模拟元件进行了研究,研制了升流器、升压器和零序电流互感器等特殊模型实验设备,搭建了一种能开展接地故障分析、小电流接地选线装置试验及故障指示器系统性测试的配电网动态模型.试验表明,该动态模型可以开展故障定位及配电自动化产品的测试研究,成果已推广到国内多所高校和电科院.

The wind energy is one of the fastest growing and most competitive new energy now,it’s quite necessary to develop an experimental platform which can be used for the scientific research and teaching on wind power technology in the laboratory environ-ment.This paper analyzes the characteristics of different wind velocities and wind turbines,proposes a physical model which fit the sci-entific research and teaching,developes a simulated doubly -fed wind power system experimental platform and the capacity of the mod-el is 10kW,The platform can run independently or connect with the power system dynamic simulation system,and can be connected to the WDT -III power system comprehensive experimental teaching system which is widely used in the national universities.The experi-ment results show that the dynamic characteristic of the model is consistent with the theory characteristic of the wind turbine,and can be used for the research and teaching experiment,the experimental platform has been applied in more than ten scientific research insti-tutions and colleges.

本文针对电气工程专业综合教学实验进行研究,介绍了各高校普遍采用的WDT-Ⅲ型电力系统综合自动化试验台的系统构成和基本实验内容,总结了部分高校利用该试验台进行课程设计、毕业设计、生产实习的一些方法,提出了基于综合试验台开展的并联补偿、串联补偿等全新实验项目,让同学们通过试验了解电力系统提高安全稳定运行的各种手段,培养学生分析问题和解决问题的能力。

To build a good hardware platform independent programming for students to enhance their ability of independent innovation,independent programming is an urgent problem to be solved in current teaching.This article introduced one kind of brand-new involvement type microcomputer relay protection test installation and its realization principle,main function,the characteristic and application method.By the protection of the establishment of DJZ-Ⅲ platform,we can do conventional computer protection test,and do electrical control,automatic equipment test,and also enable students to do self-programming,training students to achieve independent-programming and independent innovation.

In the high performance vector control,measurement and control system of the asynchronous machine,in order to obtain the operating state of machine,thoroughly research control scheme of asynchronous machine,it needs to acquire,save and display parameters such as torque and rotor speed of electrical machine.The measurement of torque and rotational speed of asynchronous machine,especially the measurement of torque,is normally realized by machinery sensors,generally the result is gotten by inverting the torque to variation of physical parameters.By analysising the torque and rotate speed measure principle of the machine,this paper designed a new measure system that can get the torque and rotational speed of asynchronous machine by measuring the basic parameters of the machine based on software technique.It shows experimentally that the system has high accuracy and good anti-jamming ability,and the operation is simple.This method makes the measurement equipment more reliable and durable.It can reduce the cost of the measurement equipment.

In view of the problem in the teaching experiment link of power system relay protection in the domestic university,this paper proposes the design concept that unifies organically the traditional simulation protection and the modern microcomputer protection,realizes the comprehensive teaching experiment on the corresponding physical model.An open-type relay protection comprehensive experiment system is developed and a public experiment platform adapting the new curriculum system is constructed.It's applied in more than 30 key colleges and universities in China,and it produces good teaching effects and improves the students' ability of innovative thought and practice.

An integrated experiment system of multi-machine power system network was proposed, which is based on multifunction power system integrated automation experimental platform. It connects multi-experimental platforms into a big power system, and collocates microcomputer monitoring system to realize four-remoteness function of power system. Aiming at the innovation and construction of the present teaching system of electric power system automation, the integrated experiment system constructs an open public experimental platform applicable to new experiment course. It can improve students' innovation thought and practice ability, and is propitious to cultivation of excellent and multiple ability talents.

针对电力类专业实验现代教学体系的研究和建设,创建了一个将主要专业课程的理论与实践相结合,既能进行各专业课程的教学实验,又能进行专业知识的综合性应用与研究的多功能实验教学平台,以便于学生运用所学知识进行综合性实验课题与应用性课题的训练,培养学生实际动手能力,综合应用和创新能力.

集控式电力专业实验教学系统(ICEETS)把发电厂、变电站综合自动化技术应用到大学专业实验中,使学生有条件在设备、技术、手段均较先进的符合系统实际情况的环境下进行实验.本文介绍了集控式电力专业实验教学系统的结构和功能特点.

本文分析了新型三相混合式步进电动机的转矩控制特性.介绍了采用IGBT功率器件和细分技术设计研制的驱动器.这种驱动器改善了步进电动机的运行工况,获得了和一般伺服系统相当的控制性能.