Temat: unbalanced voltages

Skocz do pozycji: 1.

Tytuł:: Evaluation of the Shunt Active Power Filter apparent power ratio using particle swarm optimization
Autorzy:: Kouzou, A.
Mahmoudi, M. O.
Boucherit, M. S.
Tematy:: effective apparent power
shunt active power filter
particle swarm optimization (PSO)
harmonics
unbalanced voltages
unbalanced load; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/229885.pdf Link otwiera się w nowym oknie
Opis:: The main objective of this present paper is the study of the Shunt Active Power Filter (APF) compensations capability for different perturbations in AC power system such as current unbalance, phase shift current and undesired harmonics generated by nonlinear load and/or by the power system voltage. This capability is determined by the maximum rate of the apparent power that can be delivered. This study is based on the definition of the effective apparent power as defined in IEEE 1459-2000 which was proved to be the suitable amount to be concerned in the design process of different devices.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Current limiting algorithm for three-phase grid-connected inverters
Autorzy:: Tran, Tho Quang
Tematy:: current limitation
negative sequences
reactive power compensation
three-phase grid-connected inverter
unbalanced voltages; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/2135740.pdf Link otwiera się w nowym oknie
Opis:: Grid-connected inverters are commonly used in systems of renewable energy to convert this energy source into AC power with parameters suitable for connection to the grid. In the normal operating conditions, the grid-connected inverters mainly generate active power to the grid. However, when a voltage sag or voltage imbalance occurs, the grid voltage imbalance in the conventional control methods causes negative sequence components and increases the output current magnitude of inverters. The increase of current can damage power semiconductor devices. This paper presents a strategy to limit the current magnitude of inverters under unbalanced grid voltage conditions. In this strategy, a multiple-complex-coefficient filter is used to eliminate the negative sequence voltage components. This method does not require any additional hardware. A three-phase gridconnected photovoltaic inverter system using a solar array of 20 kWp is also used for the survey. The effectiveness has been validated when comparing the simulation results on Matlab/Simulink of the proposed method with those of the conventional method.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Currents physical components (CPC) in circuits with nonsinusoidal voltages and currents. Part 1, Single-phase linear circuits
Autorzy:: Czarnecki, L. S.
Tematy:: nonsinusoidal voltages and currents
harmonics
power definitions
power phenomena
apparent
reactive
scattered
unbalanced currents or powers; Pokaż więcej
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Powiązania:: https://bibliotekanauki.pl/articles/262747.pdf Link otwiera się w nowym oknie
Opis:: The paper summarizes the present state of discussions on power phenomena, power definitions and compensation in single-phase linear circuits. The main concepts developed over several decades on how various non-active powers in circuits with nonsinusoidal voltages and currents should be defined and compensated are presented along with a detailed discussion of these concepts. The paper presents also the concept of the single-phase load current decomposition into Currents' Physical Components (CPC) and its application for power definitions and compensation in such circuits. The paper is not addressed to scientists and experts on powers, but rather to common electrical engineers that sometimes face power related problems in nonsinusoidal systems.
Dostawca treści:: Biblioteka Nauki

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