ANALYSIS OF POWER CONVERTERS FOR AC-FED TRACTION DRIVES AND MICROCOMPUTER-AIDED ON-LINE OPTIMIZATION OF THEIR LINE RESPONSE

The analysis of sector-controllable bridges shows the dependence of line responses on special circuit parameters and control methods. The line response of a line current is calculated in term of the corresponding harmonic spectrum and the magnitudes of the power factor lambda and the psophometric current I//p//s. Referring to the case of a drive model, it is shown how a microcomputer control system optimizes the line response of a particular power converter. This system evaluates the harmonics of line current and line voltage, using a fast FFT-computer. These harmonics are then expressed in terms of certain quantities which represent the line response of the system. A control algorithm makes use of these quantities to calculate a combination of firing angles for an optimum power factor, the minimum psophometric current or the suppression of certain harmonics.

• Corporate Authors:

  Institute of Electrical and Electronics Engineers (IEEE)

  Operations Center, 445 Hoes Lane, P.O. Box 1331
  Piscataway, NJ  United States  08855-1331
• Authors:
  • Becker, W
  • Janssen, R
  • MUELLER-HELLMANN, A
  • Skudelny, H-C
• Publication Date: 1984-5

Media Info

• Features: References;
• Pagination: p. 605-614
• Serial:
  • IEEE Transactions on Industry Applications
  • Issue Number: 3
  • Publisher: Institute of Electrical and Electronics Engineers (IEEE)

Subject/Index Terms

• TRT Terms: Digital computers; Electric locomotives; Electric power conditioning; Electric power supply; Electric railroads; Fast Fourier transforms; Harmonics; Mathematical models; Motors; Power converters; Power factor (Electricity); Traction; Transformations (Mathematics)
• Old TRIS Terms: Computer systems, digital; Controlled power converters; Converters; Line response; Mathematical transformations; On line operation; Power factors; Reactive and psophometric current
• Subject Areas: Energy; Public Transportation; Railroads; Vehicles and Equipment;

Filing Info

• Accession Number: 00391576
• Record Type: Publication
• Source Agency: Engineering Index
• Report/Paper Numbers: VIA-2
• Files: TRIS
• Created Date: Jan 30 1985 12:00AM