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Ensuring the operation of electrical equipment during short-time voltage sags or power outage

Citace:
KŮS, V., PITTERMANN, M., FOŘT, J. Ensuring the operation of electrical equipment during short-time voltage sags or power outage. In Proceedings of the 17th European Conference on Power Electronics and Application (EPE ECCE Europe 2015). Piscataway, New Jersey: IEEE, 2015. s. 1-8. ISBN: 978-90-75815-23-8
Druh: STAŤ VE SBORNÍKU
Jazyk publikace: eng
Anglický název: Ensuring the operation of electrical equipment during short-time voltage sags or power outage
Rok vydání: 2015
Místo konání: Piscataway, New Jersey
Název zdroje: IEEE
Autoři: Prof. Ing. Václav Kůs CSc. , Ing. Martin Pittermann Ph.D. , Ing. Jiří Fořt Ph.D.
Abstrakt EN: This paper describes the situation of a modern electric drive (induction machine supplied from indirect frequency converter with voltage source inverter) in industry (paper mills, etc.), where a voltage sag can bring significant problems with long-time interruption of the production process. One method of operation is a direct increase of voltage in the DC-link of a frequency converter with a step-up converter during voltage sag. A transistor designed for braking is often used. It is used often present transistor designed for braking. The article presents the waveforms of voltages and currents in the circuit of an indirect frequency converter in the case of voltage sags without the intervention of a stepup converter. Then it presents waveforms with the use of a boost converter and its various control options.
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