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High-efficient line converter in `Hybrid-Concept`; Hocheffizienter Netzstromrichter in Hybridstruktur

Technical Report:

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>>
Authors:
Publication Date:
Oct 01, 1992
Product Type:
Technical Report
Report Number:
LEM-92-04
Reference Number:
SCA: 140600; PA: CH-92:0E0235; SN: 93000904832
Resource Relation:
Other Information: PBD: Oct 1992
Subject:
14 SOLAR ENERGY; SOLAR POWER PLANTS; INVERTERS; ENERGY EFFICIENCY; FILTERS; OPTIMIZATION; LOCOMOTIVES; EXPERIMENTAL DATA; 140600; PHOTOVOLTAIC POWER SYSTEMS
OSTI ID:
10105020
Research Organizations:
Eidgenoessische Technische Hochschule, Zurich (Switzerland). Chair of Power Electronics and Electrometrology
Country of Origin:
Switzerland
Language:
German
Other Identifying Numbers:
Other: ON: DE93743642; CNN: EC/PROC(91)43; TRN: CH92E0235
Availability:
OSTI; NTIS
Submitting Site:
CH
Size:
40 p.
Announcement Date:
Jun 30, 2005

Technical Report:

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}
}