共查询到20条相似文献,搜索用时 78 毫秒
1.
Hermann Maurer 《e & i Elektrotechnik und Informationstechnik》2002,119(5):a18-a19
SciencenewsBMVIT-Forschungsprogramme
Technologieoffensive — Verkehrs-systeme und Weltraumprogramme 相似文献2.
Franz Pichler 《e & i Elektrotechnik und Informationstechnik》2014,131(2):53-62
Today we use e-mail and SMS to transmit written messages across far distances. In the past this was already possible by means of dial telegraphy. A special form of the dial telegraph was the so called magneto-electric dial telegraph which did not need a galvanic battery, since the signals were generated by a magneto-electric machine. The invention of this particular dial telegraph is based on a patent of the well-known English professor in physics Charles Wheatstone back in 1840. This paper covers the details of this invention as well as the early efforts to introduce this telegraph system for public use. The finally successful development of magneto-electric dial telegraphs of Emil Stoehrer (Leipzig 1846), Werner von Siemens (Berlin 1856) and Charles Wheatstone (London 1858) are discussed. 相似文献
3.
E. Kadecka W. Kaiser M. Schwendenwein 《e & i Elektrotechnik und Informationstechnik》1999,116(1):57-64
In the course of the renewal of the Central Control Centre Innsbruck for generation and transport of the traction energy of the Austrian Federal Railways (ÖBB) an Energy Management System with a considerable share of Power Application Software including a training simulator was set up. The Power Application Software supplies a consistent and complete picture of the electrical power network and is the basis for the further arithmetical treatment of the process. It supports the operator in the reliable and economic system management of processes getting increasingly complex. Further it serves as help for decisions regarding the short-time system planning. The training simulator serves for the simulation of unusual operating conditions and is also used for the training of the load control engineers. 相似文献
4.
OVE News
Intelligente Geb?ude und Wohnungen 相似文献5.
Technische Besonderheiten und Schutzproblematik bei der Einbindung dezentraler Stromerzeugungsanlagen — vom Netz zum Erzeuger und umgekehrt 总被引:1,自引:1,他引:0
15. Zusammenfassung Dezentrale Stromerzeugungsanlagen sind nicht durch die Netzstruktur/Leitungsl?ngen, die Spannungsebene oder die Einspeiseleistung
definiert, sondern dezentral Stromeinspeisung in einem Netz ist dann problematisch, wenn das Dispatching, die Netzinformationssysteme,
die Schutztechnik und die Leittechnik nicht ad?quat gel?st sind.
Sachgerechte L?sungen für die Probleme, die sich aus den o. a. M?ngeln ergeben, sind nach folgenden allgemeinen Merkmalen
zu analysieren: Lastgang und Netzsteuerung (Dispatching), Kurzschlussleistung und Kurzschlussstrom, Wirklast- und Blindleistungsfluss,
Spannungshaltung, Personensicherheit.
Hinsichtlich der Forderung eines funktionssicheren Schutzsystems sind zu untersuchen: Fehlerstromfluss, überstromschutz vs.
Unit-Protection, Messprobleme beim Distanzschutz, Erdschlussschutz, Reserveschutz, Inselbildungsstrategien, automatische Wiedereinschaltung.
Man sollte auf jeden Fall prüfen, ob, wann und in welchem Umfang die Realisierung der im Beitrag aufgezeigten, sachgerechten
L?sungen im Lichte einer gesamtwirtschaftlichen Optimierung unter Einbeziehung von „Economy-of-Scale“-Betrachtungen sinnvoll
ist.
Kurzfassung eines Vortrags der 41. Fachtagung der ?sterreichischen Energietechnischen Gesellschaft (OGE) im OVE, die am 5.
und 6. November 2003 in Salzburg stattfindet. 相似文献
6.
A high quality electric power supply needs adequate power quality and reliability. Voltage dips lead to a strong decrease of power quality. With the network data and the fault and disturbance statistics of the network, the expected number of voltage dips per year and the distribution of their amplitudes and durations can be calculated. This paper presents two calculation methods which are compared to measurement results. With these numbers, an estimation of the failure costs for customers is possible. Furthermore the influence of different network improvements on social economic costs is shown with a simple example network. 相似文献
7.
U. Drofenik ÖVE IEEE J. W. Kolar ÖVE IEEE 《e & i Elektrotechnik und Informationstechnik》2000,117(2):141-146
In this paper a three-phase PFC PWM rectifier system with low effects on the mains (VIENNA Rectifier 1) which has been developed at the Technical University Vienna in 1994 is described. As compared to conventional rectifier systems the VIENNA Rectifier 1 shows significant advantages such as unity power factor, sinusoidal input current shape (fundamental ohmic mains behavior), controlled output voltage, high efficiency (typically 97%), low costs, high power density and/or low volume, high reliability, and significantly reduced conducted common-mode noise emission. Research is done on this system in companies and universities, e.g. in Europe, U.S.A., Canada, Japan, China and Australia. Furthermore, the paper presents a comparison of a two-stage converter system, which is formed by connecting the VIENNA Rectifier 1 to a DC/DC converter with high frequency isolation (e.g. for applications in uninterruptible power supply systems) and two further developements of the Technical University Vienna which feature single-stage power conversion, i.e. VIENNA Rectifier 2 and VIENNA Rectifier 3. 相似文献
8.
Insa Sjurts 《e & i Elektrotechnik und Informationstechnik》2002,119(2):a5-a6
AktuellAusstellung im Siemens Forum Wien
E-Volution — Wirtschaft und Leben im Netz 相似文献9.
Firmen&;ProdukteDehn-Schutzkonzepte
Windenergie — Auch bei Blitz und Donner 相似文献10.
Wolfgang Kabatzke 《e & i Elektrotechnik und Informationstechnik》2002,119(5):a23-a24
Firmen&;ProdukteSia, PCD-Steuerungen
Kommunizieren über Ethernet-TCP/IP und Feldbus 相似文献11.
Model-based diagnosis deals with a set of methods for finding faults in (usually technical) systems by examining the way these systems operate when functioning correctly, instead of using the classical “expert system” approach of painstakingly collecting all individual fault cases. The types of components occurring in a problem domain have their behavior described in a generic catalogue and can then be simply combined to describe any system from that domain. If faulty behavior is observed, a general solution algorithm can be applied to identify the set of components whose misbehavior explains the fault. 相似文献
12.
BranchennewsABB-Strategie
Lüftungs- und Klimatechnikgesch?ft verkauft 相似文献13.
Karin Gattringer 《e & i Elektrotechnik und Informationstechnik》2002,119(5):a5-a5
AktuellSunshine Academy
Neues Bildungszentrum für Solar- und Haustechnik 相似文献14.
Christoph Heller 《e & i Elektrotechnik und Informationstechnik》2002,119(1):a19-a19
BranchennewsEkey-konsortium
Bezahlen per Fingerscan 相似文献15.
《e & i Elektrotechnik und Informationstechnik》2002,119(1):a24-a25
SciencenewsWissenschaftsdatennetz
Bildungsministerium und Telekom Austria rüsten auf 相似文献16.
Kurt P. Judmann 《e & i Elektrotechnik und Informationstechnik》2002,119(11):a16-a16
Sciencenews10-Jahr-Feier
Institut für Maschinelles Sehen und Darstellen 相似文献17.
Zuverlässigkeit und Sicherheit in der Energieversorgung 总被引:3,自引:3,他引:0
G. Brauner O. Univ.-Prof. Dipl.-Ing. Dr.-Ing. 《e & i Elektrotechnik und Informationstechnik》2003,120(5):133-137
The terms reliability and security are often used imprecisely or in a wrong manner. In the following the meaning of the terms is described from the view of an utility and recommendations for reliability and security of energy supply are derived. 相似文献
18.
T. Rauscher N. Reiter H. J. Schweinzer S. Soucek 《e & i Elektrotechnik und Informationstechnik》2000,117(5):308-313
The acceptance of fieldbus systems for distributed control applications is increasing very fast. LonWorks is a widely used system for process and building automation, often hosting more than 10 000 nodes nowadays. The design of such large systems requires to be aware of the limitations of the underlying technology. Limitations include node resources, the number of destination addresses and bus utilization. The implementation of large systems can be achieved by distributing applications in an intelligent way, grouping nodes and segmenting the network. 相似文献
19.
Andreas Bertsch 《e & i Elektrotechnik und Informationstechnik》2002,119(3):a7-a8
AktuellEcaustria.At
Info-, Service- und Veranstaltungsplattform für E-Business 相似文献20.
J. Pluy ÖVE 《e & i Elektrotechnik und Informationstechnik》1999,116(1):12-16
The Austrian Federal Railways (ÖBB) with a demand for traction-energy of about 2 100 GWh will be an authorized customer in the first stage of the liberalized European power market. Therefore there are various opportunities to optimize the own production, delivery contracts and additional supply. This arcticle describes a possible portfolio for electricity-sourcing of the ÖBB with respect to a secure and cheap energy supply. 相似文献