Abstract
Large voltage source inverters (VSI) with GTO-Thyristors produce high losses during the switching processes. Therefore, their switching frequency is strictly limited to a few hundred Hertz. A high level of harmonic content in the load current is the result. When VSIs serve as line converters for the exchange of active or reactive power between the AC mains and a DC link, these high harmonic currents can not be tolerated in the mains. In the present report, the parallel connection of a high power VSI with GTO-thyristors and a low power VSI which works as an active filter is investigated. As an option, the active filter is able to transmit active power when the main inverter is turned off. This feature is advantageous for all applications where part-load conditions occur frequently and leads to the name `hybrid concept`. The main dimensioning rules, such as power rating, switching frequency and stray reactance of the transformers, are presented for both inverters. The optimization of the different parameters is based on a detailed analysis of the losses, especially those of the main inverter. The results show that the combination of a large VSI with an active filter does not only improve the line current
More>>
Citation Formats
Meyer, M.
High-efficient line converter in `Hybrid-Concept`; Hocheffizienter Netzstromrichter in Hybridstruktur.
Switzerland: N. p.,
1992.
Web.
Meyer, M.
High-efficient line converter in `Hybrid-Concept`; Hocheffizienter Netzstromrichter in Hybridstruktur.
Switzerland.
Meyer, M.
1992.
"High-efficient line converter in `Hybrid-Concept`; Hocheffizienter Netzstromrichter in Hybridstruktur."
Switzerland.
@misc{etde_10105020,
title = {High-efficient line converter in `Hybrid-Concept`; Hocheffizienter Netzstromrichter in Hybridstruktur}
author = {Meyer, M}
abstractNote = {Large voltage source inverters (VSI) with GTO-Thyristors produce high losses during the switching processes. Therefore, their switching frequency is strictly limited to a few hundred Hertz. A high level of harmonic content in the load current is the result. When VSIs serve as line converters for the exchange of active or reactive power between the AC mains and a DC link, these high harmonic currents can not be tolerated in the mains. In the present report, the parallel connection of a high power VSI with GTO-thyristors and a low power VSI which works as an active filter is investigated. As an option, the active filter is able to transmit active power when the main inverter is turned off. This feature is advantageous for all applications where part-load conditions occur frequently and leads to the name `hybrid concept`. The main dimensioning rules, such as power rating, switching frequency and stray reactance of the transformers, are presented for both inverters. The optimization of the different parameters is based on a detailed analysis of the losses, especially those of the main inverter. The results show that the combination of a large VSI with an active filter does not only improve the line current spectrum and the behaviour in case of a distorted line voltage, but can also lead to reduced losses. Two applications, a large solar power station and an inverter locomotive, are considered in detail. (author) figs., tabs., 19 refs.}
place = {Switzerland}
year = {1992}
month = {Oct}
}
title = {High-efficient line converter in `Hybrid-Concept`; Hocheffizienter Netzstromrichter in Hybridstruktur}
author = {Meyer, M}
abstractNote = {Large voltage source inverters (VSI) with GTO-Thyristors produce high losses during the switching processes. Therefore, their switching frequency is strictly limited to a few hundred Hertz. A high level of harmonic content in the load current is the result. When VSIs serve as line converters for the exchange of active or reactive power between the AC mains and a DC link, these high harmonic currents can not be tolerated in the mains. In the present report, the parallel connection of a high power VSI with GTO-thyristors and a low power VSI which works as an active filter is investigated. As an option, the active filter is able to transmit active power when the main inverter is turned off. This feature is advantageous for all applications where part-load conditions occur frequently and leads to the name `hybrid concept`. The main dimensioning rules, such as power rating, switching frequency and stray reactance of the transformers, are presented for both inverters. The optimization of the different parameters is based on a detailed analysis of the losses, especially those of the main inverter. The results show that the combination of a large VSI with an active filter does not only improve the line current spectrum and the behaviour in case of a distorted line voltage, but can also lead to reduced losses. Two applications, a large solar power station and an inverter locomotive, are considered in detail. (author) figs., tabs., 19 refs.}
place = {Switzerland}
year = {1992}
month = {Oct}
}