Monitoring of events in the power system provides a great deal of insight into the behavior of the system. Events with impact on the entire power system typically occur in or near the transmission network and are therefore best monitored at transmission system substations. This puts great demands on the equipment and in general restricts the use of the data since it becomes property of the transmission system operator. An alternative is to measure at lower voltage levels. This paper documents the close agreement between voltage and frequency at low and high voltage levels during a remote and a nearby fault in the transmission network. The very high quality of the data suggests that valuable information about the transmission system can be obtained at lower voltages.Index Terms-Power system dynamic stability, power system faults, power system monitoring.

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Abstract-This paper deals with the problems related to an islanding experiment performed at Rejsby Hede in Denmark. During the experiment several interesting observations were made in connection to distortion of voltages and currents. Observations were also made in connection to variation of frequency and phase. In this paper the data are analyzed in three different manners and the results are related to the physics of the electric system.

In a drive to attract more students, three new courses have been introduced at the Department of Electric Power Engineering of the Technical University of Denmark. Among many students, Power Engineering has a reputation of being old-fashioned and static, whereas Information Technology is regarded as young and dynamic. Consequently, the new courses apply Information IT as a gateway to Power Engineering. The courses present the students with, 1) a meaningful, easy understandable Power Engineering problem, 2) a realistic set-up in the laboratory and 3) a microprocessor system used as a tool to solve the problem. The students work mainly with programming but as the course develops they gain preliminary insight into the field of Power Engineering and experience that it is a broad field exploiting various advanced disciplines. In addition, course timing is highly important. Students must be confronted at an early stage of their study before they make a decision to specialise.Keywords: Power engineering education, Microprocessor applications, Information technology, Wind power generation, Protective relaying. Henrik Havemann Department of Electric Power EngineeringTechnical University of Denmark Build. 325, DK-2800 Lyngby Denmark attention could be to highlight in relevant IT-applications in power engineering courses.Fortunately, the nature of power engineering and the equipment available in a power laboratory makes it straightforward to formulate meaningful problems, with an immediate practical aspect that should appeal to most students. The problem should be structured so that its solution requires primarily the use of information technology. No prior detailed knowledge to power engineering should be invoked. Hence, the student can gain an insight into power engineering while mainly working with information technology. In that way the student can experience immediately that power engineering is a broad field involving various advanced disciplines. This is the philosophy behind new courses initiated at the Department of Electric Power Engineering (ELTEK) at DTU.