Wyniki wyszukiwania - BazTech

1

Projektowanie i synchroniczne sterowanie współpracy kompensatorów mocy biernej

Tedeschi E., Tendi P.

Przegląd Elektrotechniczny

|

2008

|

R. 84, nr 6

23-27

PL

W artykule przedstawione są teoretyczne podstawy projektowania i synchronicznego sterowania kilku kompensatorów pracujących w tym samym systemie. Metoda oparta jest na zasadzie zachowania mocy chwilowej i w sposób naturalny rozszerza definicje mocy w obwodach z niesinusoidalnymi przebiegami prądu i napięcia. W oparciu o przedstawione podstawy teoretyczne, opracowane są algorytmy sterowania na poziomie systemowym i na poziomie urządzeń, umożliwiające współpracę statycznych kompensatorów mocy biernej (SVC) z Aktywnymi Filtrami Mocy (AFP).

EN

A theoretical background for the design and coordinated control of multiple compensation equipment acting in the same network is presented. It makes use of instantaneous power terms which are conservative in every network and naturally extend the usual power definitions to the case of distorted voltages and currents. Based on the theoretical approach, a system-level and equipment-level control algorithm is developed, which allows cooperative operation of Static VAR Compensators (SVC) and Active Power Filters (APF).

2

Generalized symmetrical components for periodic non-sinusoidal Three-phase signals

Tenti P., Willems J. L., Mattavelli P., Tedeschi E.

Electrical Power Quality and Utilisation. Journal

|

2007

|

Vol. 13, nr 1

9-15

EN

This paper deals with the generalization of the symmetrical components technique to periodic non-sinusoidal three-phase currents and voltages. The generalization of the concept of symmetrical components is discussed together with their derivation in both time and frequency domain. The main conclusion of the paper is that an orthogonal decomposition of periodic nonsinusoidal three-phase signals into positive sequence, negative sequence and zero-sequence components is not possible, but that an additional current and voltage component should be introduced, which is called the residual component.

3

Compensation Techniques Based on Reactive Power Conservation

Tenti P., Mattavelli P., Tedeschi E.

Electrical Power Quality and Utilisation. Journal

|

2007

|

Vol. 13, nr 1

17-24

EN

The paper introduces two definitions of instantaneous reactive power terms, which are conservative in every network and apply even under non-sinusoidal conditions. Both quantities coincide with usual reactive power for sinusoidal operation, however they assume a different meaning for distorted behaviour. The first one is an energy-related term, and its unbiased integral accounts for the average energy stored in the network. The second has a differential nature and is suitable for dynamic analysis and control of harmonic and reactive power sources acting in the network. The combined use of both approaches allows cooperative operation of static and dynamic reactive and harmonic compensators, like STATCOMs and Active Power Filters.