A new control method of a current balancer in single-phase three-wire secondary distribution systems using the correlation and cross-correlation coefficients

Hirokazu Fukui, Eiji Hiraki, Toshihiko Tanaka

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper proposes a new control method of a current balancer for single-phase three-wire secondary distribution systems using the correlation and cross-correlation coefficients to reduce the capacity of the three-leg PWM inverter, which performs the current balancer. The components correlative and cross-correlative to the primary side voltage waveform, which correspond to the active and reactive currents, are calculated from the detected load currents on each feeder. Then the reactive and unbalanced-active currents are compensated on the source side. The balanced source currents with the power factor of 0.9 are obtained in each feeder. This imperfect compensation of the reactive power reduces the capacity of both the threeleg PWM inverter and dc capacitor. The basic principle of the proposed method is discussed in detail, and then confirmed by digital computer simulation. A proto-type experimental system is constructed and tested. Experimental results demonstrate that the balanced source currents with the power factor of 0.9 are obtained in spite of unbalanced load currents reducing the capacity of the three-leg PWM inverter.

Original languageEnglish
Title of host publicationProceedings - 34th Annual Conference of the IEEE Industrial Electronics Society, IECON 2008
Pages2267-2272
Number of pages6
DOIs
Publication statusPublished - 2008
Externally publishedYes
Event34th Annual Conference of the IEEE Industrial Electronics Society, IECON 2008 - Orlando, FL, United States
Duration: Nov 10 2008Nov 13 2008

Other

Other34th Annual Conference of the IEEE Industrial Electronics Society, IECON 2008
CountryUnited States
CityOrlando, FL
Period11/10/0811/13/08

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Keywords

  • Active-reactive current
  • Correlation coefficient
  • Crosscorrelation
  • Current balancer
  • Single-phase three-wire secondary distribution system
  • Three-leg inverter
  • Unbalanced condition

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Fukui, H., Hiraki, E., & Tanaka, T. (2008). A new control method of a current balancer in single-phase three-wire secondary distribution systems using the correlation and cross-correlation coefficients. In Proceedings - 34th Annual Conference of the IEEE Industrial Electronics Society, IECON 2008 (pp. 2267-2272). [4758310] https://doi.org/10.1109/IECON.2008.4758310