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Expansion of Power Definition in IEEE-1459 in Order to Apply to Shunt Active Power Filters

Ahmadi, Meysam | 2011

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 41668 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Mokhtari, Hossein
  7. Abstract:
  8. Increase of nonlinear loads has led rise of harmonic currents, voltage distortion and imbalance in power system. Those polluted nonsinusuidal environments have made electrical engineer and researchers to define new and more compelet definition of electrical power quantities such as power factor, apparent power, THD and … . The new definitions have resulted in new methods of power quality enhancement technique. IEEE-1459 Std. proposes definitions for electric power in sinusoidal, nonsinusoidal, balanced and unbalanced conditions which can be used for compensation of nonsinusoidal and unbalanced systems. This reaserch introduces a new method to obtain shunt active filter reference signal. This is done by expansion of the definition of effective current, effective voltage and effective power factor concept defined in IEEE-1459 Std. since the effective power factor is obtained by equalizing line losses in the actual nonsinusoidal- unbalanced system and a virtual sinusoidal-balanced system, therefore, improvement of this factor can result in less line losses. In this thesis, it is shown that the effective power factor can express system situation better than other power factors. In addition, it proposes a new resolution of effective apparent power and effective current and voltage. A new factor for harmonic and unbalanced voltage and current that is compound of THD and TU factors is also introduced in this reasech work
  9. Keywords:
  10. Shunt Active Power Filter ; Institute Electrical and Electronic Engineers (IEEE)1459 Standard ; Reference Signal ; Effective Power Factor

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