Zero-sequence component and Harmonic Compensation in Four-wire Systems under Non-ideal Waveforms

• Autorzy: Pashajavid E. , Bina T.

Warianty tytułu

PL

Kompensacja składowej zerowej i zmniejszenie zawartości harmonicznych w układzie czteroprzewodowym

• Języki publikacji: EN

Abstrakty

EN

The generalized theory of instantaneous powers has gained a great popularity in compensation of instantaneous powers and harmonic cancellation. This is practically true for three-phase systems as long as the load-terminal voltages remain balanced and sinusoidal. Nevertheless, for a three-phase four-wire system, when the power system is unbalanced or distorted, then these definitions introduce unsatisfactory cancellation of the source zero sequence current and harmonics suppression. This paper analyzes and simulates the aforesaid problem to show the issues concerned with the generalized theory of instantaneous powers. Further, complementary analytical discussions are suggested to remedy the raised problem. Finally, the improved definitions are simulated for a distorted and unbalanced three phase four-wire system. Comparing the complementary solutions with those of previously emerged generalized definitions confirms that the proposed solutions potentially provide a full cancellation of source-end zero sequence current as well as harmonics suppression under distorted and unbalanced load voltages.

PL

Ogólna teoria mocy chwilowej ma duże znaczenie przy kompensacji mocy chwilowych i eliminacji harmonicznych. Ta teoria jest prawdziwa dla systemów trzyfazowych jeśli napięcie obciążenia pozostaje zrównoważone i sinusoidalne. Jednak w systemach trzyfazowych, czteroprzewodowych te metody nie dają zadawalającej eliminacji prądu zerowego. W artykule przeanalizowano i zasymulowano powyższy problem dla pokazania niedostatków stosowania ogólnej teorii mocy chwilowej. Następnie zaproponowano rozwiązanie tych problemów. Wreszcie przedstawiono ulepszona definicję uwzględniającą system czteroprzewodowy. Wykazano, ze proponowany model umożliwia pełna kompensację prądu zerowego i zmniejszenie zawartości harmonicznych także dla obciążenia układu niezrównoważonego.

Słowa kluczowe

EN

power definition; active power filter; p-q theory; compensation

PL

definicja mocy; filtr aktywny; kompensacja

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Przegląd Elektrotechniczny
• Rocznik: 2009
• Tom: R. 85, nr 10
• Strony: 58--64
• Opis fizyczny: Bibliogr. 18 poz., rys., schem., tab.

Twórcy

autor

Pashajavid E.

autor

Bina T.

• Faculty of Electrical Engineering, K. N. Toosi University of Technology, Seid Khandan, P. O. Box 16315-1355, Tehran 16314-Iran,

Bibliografia

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