A nonlinear feed-forward control technique for single-phase UPS inverters

Joseph M. Guerrero*, Luis Garcia De Vicuña, Jaume Miret, Jose Matas

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Publikation: Konferencebidrag uden forlag/tidsskriftPaper uden forlag/tidsskriftForskningpeer review

19 Citationer (Scopus)

Abstrakt

This paper presents a nonlinear feed-forward controller applied to a single-phase uninterruptible power supplies (UPS). The controller was conceived by using a one-cycle based PWM generator and an output-current feedforward, in order to cancel input-voltage disturbances and nonlinear load currents, respectively. It also includes an external control loop to ensure good output-voltage tracking. The controller design is based on a large-signal approach, introduced to achieve good transient response and stability in a wide range of parameter variations. Besides, in spite of the nonlinear nature of the controller, we obtain a linear average output-voltage dynamic response. The proposed control provides the following features: fast transient response, low THD sine-wave output-voltage, fixed switching frequency, and high robustness against load and line step changes. Simulation results show the effectiveness of this control technique for inverters in UPS applications, especially when nonlinear loads must to be supplied and UPS DC-link has large undesirable ripple.
OriginalsprogEngelsk
Publikationsdato1 dec. 2002
Antal sider5
StatusUdgivet - 1 dec. 2002
Udgivet eksterntJa
BegivenhedProceedings of the 2002 28th Annual Conference of the IEEE Industrial Electronics Society - Sevilla, Spanien
Varighed: 5 nov. 20028 nov. 2002

Konference

KonferenceProceedings of the 2002 28th Annual Conference of the IEEE Industrial Electronics Society
LandSpanien
BySevilla
Periode05/11/200208/11/2002
SponsorIEEE, Industrial Electronics Society, SICE, Universidad de Sevilla

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