Harmonics in power systems of ships with electrical propulsion drives. Part 2. Comparison between different converters

Matti Lehtonen

Research output: Book/ReportReportProfessional

Abstract

In this report the effects of harmonics in marine power systems is discussed and a comparison is given between the most typical converter types, including pulse width modulated drives, load commutated inverters and cycloconverters. The effect of harmonic distortion on the power system equipment and loads is first briefly discussed. Special attention is given to the circumstances in the low voltage distribution system, where general load equipment is connected. In addition to the total harmonic distortion the effect of voltage deviation to the supply quality is also considered. The origin of harmonics in the load currents of the three converter types is then considered. The differences between the converters are outlined, and the most typical spectra are presented. The possible means for reducing the harmonic distortion are also studied. The solutions considered are the increasing of the short circuit level, the use of harmonic filters and the increasing of the pulse number. In the case of cycloconverters, the optimization of the phase shift between the parallel operating bridges is also presented. Finally the effects of different convertor types on the voltage quality are compared using calculations made for a typical marine power system.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages35
ISBN (Print)951-38-4878-7
Publication statusPublished - 1996
MoE publication typeNot Eligible

Publication series

NameVTT Tiedotteita - Meddelanden - Research Notes
PublisherVTT
No.1723
ISSN (Print)1235-0605
ISSN (Electronic)1455-0865

Fingerprint

Harmonic distortion
Propulsion
Ships
Electric potential
Phase shift
Short circuit currents
AC-AC power converters

Keywords

  • power equipment
  • ships
  • propulsion
  • drives
  • electric drives
  • electric propulsion
  • comparison
  • converters
  • marine propulsion
  • electric power generation

Cite this

Lehtonen, M. (1996). Harmonics in power systems of ships with electrical propulsion drives. Part 2. Comparison between different converters. Espoo: VTT Technical Research Centre of Finland. VTT Tiedotteita - Meddelanden - Research Notes, No. 1723
Lehtonen, Matti. / Harmonics in power systems of ships with electrical propulsion drives. Part 2. Comparison between different converters. Espoo : VTT Technical Research Centre of Finland, 1996. 35 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 1723).
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abstract = "In this report the effects of harmonics in marine power systems is discussed and a comparison is given between the most typical converter types, including pulse width modulated drives, load commutated inverters and cycloconverters. The effect of harmonic distortion on the power system equipment and loads is first briefly discussed. Special attention is given to the circumstances in the low voltage distribution system, where general load equipment is connected. In addition to the total harmonic distortion the effect of voltage deviation to the supply quality is also considered. The origin of harmonics in the load currents of the three converter types is then considered. The differences between the converters are outlined, and the most typical spectra are presented. The possible means for reducing the harmonic distortion are also studied. The solutions considered are the increasing of the short circuit level, the use of harmonic filters and the increasing of the pulse number. In the case of cycloconverters, the optimization of the phase shift between the parallel operating bridges is also presented. Finally the effects of different convertor types on the voltage quality are compared using calculations made for a typical marine power system.",
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Lehtonen, M 1996, Harmonics in power systems of ships with electrical propulsion drives. Part 2. Comparison between different converters. VTT Tiedotteita - Meddelanden - Research Notes, no. 1723, VTT Technical Research Centre of Finland, Espoo.

Harmonics in power systems of ships with electrical propulsion drives. Part 2. Comparison between different converters. / Lehtonen, Matti.

Espoo : VTT Technical Research Centre of Finland, 1996. 35 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 1723).

Research output: Book/ReportReportProfessional

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KW - electric drives

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KW - electric power generation

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Lehtonen M. Harmonics in power systems of ships with electrical propulsion drives. Part 2. Comparison between different converters. Espoo: VTT Technical Research Centre of Finland, 1996. 35 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 1723).