Powers of Asymmetrically Supplied Loads in Terms of the CPC Power Theory

• Autorzy: Czarnecki L. S.
• Języki publikacji: EN

Abstrakty

EN

Power related phenomena in three-phase, three-wire circuits with linear time-invariant (LTI) loads supplied with asymmetrical sinusoidal voltage are investigated in this paper. The study is based on the concept of the Currents’ Physical Component (CPC) power theory. It is shown that the supply current of LTI loads with sinusoidal asymmetrical voltage, as in the case of symmetrical voltage, is composed of only three physical components, the active, reactive and unbalanced currents. Consequently, loads in such conditions can be characterized by the active, reactive and unbalanced powers. The equivalent and unbalanced admittances of three-phase loads at symmetrical supply voltage are constant, independent on the supply voltage, parameters. The paper shows that these parameters at asymmetrical supply depend on the voltage asymmetry.

• Wydawca: AGH University of Science and Technology ; Lodz University of Technology
• Czasopismo: Electrical Power Quality and Utilisation. Journal
• Rocznik: 2007
• Tom: Vol. 13, nr 1
• Strony: 97--104
• Opis fizyczny: Bibliogr. 3 poz.

Twórcy

autor

Czarnecki L. S.

• Louisiana State University, USA,

Bibliografia

• 1. F o r t e s c u e C . L . : Method of symmetrical components as applied to the solution of polyphase networks. A.I.E.E. 37, (1918), p. 1027.
• 2. C z a r n e c k i L . S .: Orthogonal decomposition of the current in a three-phase non-linear asymmetrical circuit with nonsinusoidal voltage. IEEE Trans. Instr. Measur., Vol. IM-37, No. 1, pp. 30.34, March 1988.
• 3. C z a r n e c k i L . S . : Powers in circuits with nonsinusoidal voltages and currents. Warsaw University of Technology Publishing Office, 2005.