Quasi-instantaneous generation of reference signals for hybrid compensator control

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

Abstrakty

EN

Power variation of a customer load can disturb other loads in distribution systems and compensators for such loads are sometimes needed. Voltages and currents in systems with such loads can be asymmetrical, nonperiodic, distorted and even unpredictable. Consequently, reference signals for the compensator control have to be generated in a situation where the power properties of the load are not well specified. Voltages and currents in systems with time-varying loads, although nonperiodic, can be treated as quantities with a disturbed periodicity. These are referred to as semi-periodic quantities. Under such an assumption, the Current Physical Components (CPC) power theory can by used for estimation of the power properties of such loads. In such a case, the CPC power theory provides fundamentals for a quasi-instantaneous generation of reference signals for the compensator control, based both on the frequency- and on the time-domain approach. The paper presents fundamentals of generation of reference signals for unbalanced loads with semi-periodic voltages and currents.

Słowa kluczowe

EN

compensator control; CPC; harmonic filters; hybrid compensators; power variation; power theory; non-periodic currents; semi-periodic currents; harmonics

• Wydawca: AGH University of Science and Technology ; Lodz University of Technology
• Czasopismo: Electrical Power Quality and Utilisation. Journal
• Rocznik: 2007
• Tom: Vol. 13, nr 2
• Strony: 3--8
• Opis fizyczny: Bibliogr. 7 poz.

Twórcy

autor

Czarnecki L. S.

• ECE, Louisiana State University Baton Rouge, LA 70803, USA phone: [phone],

Bibliografia

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• 2. C z a r n e c k i L . S .: Currents’ Physical Components (CPC) in circuits with nonsinusoidal voltages and currents. Part 2: Three-phase linear circuits. Electrical Power Quality and Utilization Journal, Vol. X, No.1, pp.1–14, 2006.
• 3. C z a r n e c k i L . S . : Powers in Circuits with Nonsinusoidal Vol-tages and Currents. (in Polish), Publisher: Warsaw Univ. of Technology Publication Office, 2005.
• 4. C z a r n e c k i L . S . : Circuits with semi-periodic currents: main features and power properties. Europ. Trans. on Electrical Power, ETEP Vol. 12, No. 1, pp. 41–46, Jan./Feb. 2002.
• 5. F i r l i t A . : Current’s physical components theory and p-q power theory in the control of the three-phase shunt active power filter. 7th Int. Workshop on Power Definitions and Measurement under Non-Sinusoidal Conditions, Cagliari, Italy, 2006.
• 6. G i n n I I I H . L . : A hybrid reference signal generator for active compensators. 7th Int. Workshop on Power Definitions and Measurement under Non-Sinusoidal Conditions, Cagliari, Italy, 2006.
• 7. C z a r n e c k i L . S . : Power theory of electrical circuits with quasiperiodic waveforms of voltages and currents. European Transaction on Electrical Power, ETEP Vol. 6, No. 5, pp. 321–328, Sept./Oct. 1996.