A Wireless Controller for Parallel Inverters in Distributed Online UPS Systems

Josep M. Guerrero*, Luis García de Vicuña, Jose Matas, Jaume Miret, Miguel Castilla

*Kontaktforfatter

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

8 Citationer (Scopus)

Abstrakt

In this paper, a novel controller for parallel-connected online-UPS inverters without control wire interconnections is presented. The wireless control technique is based on the well-known droop method, which consists in introducing P-ω and Q-V schemes into the inverters, in order to share properly the power drawn to the loads. The droop method has been widely used in applications of load sharing between different parallel-connected inverters. However, this method has several drawbacks that limited its application, such as a trade-off between output-voltage regulation and power sharing accuracy, slow transient response, and frequency and phase deviation. This last disadvantage makes impracticable the method in online-UPS systems, since in this case every module must be in phase with the utility ac mains. To overcome these limitations, we propose a novel control scheme, endowing to the paralleled-UPS system a proper transient response, strictly frequency and phase synchronization with the ac mains, and excellent power sharing. Simulation and experimental results are reported confirming the validity of the proposed approach.
OriginalsprogEngelsk
Publikationsdato1 dec. 2003
Antal sider6
DOI
StatusUdgivet - 1 dec. 2003
Udgivet eksterntJa
Begivenhedthe 29th Annual Conference of the IEEE Industrial Electronics Society, IECON 2003, Roanoke, Virginia, USA, 2003 - Roanoke, VA, USA
Varighed: 2 nov. 20036 nov. 2003
Konferencens nummer: 29

Konference

Konferencethe 29th Annual Conference of the IEEE Industrial Electronics Society, IECON 2003, Roanoke, Virginia, USA, 2003
Nummer29
LandUSA
ByRoanoke, VA
Periode02/11/200306/11/2003
SponsorIEEE Industrial Electronics Society, SICE, Vorginia Tech - Center for Rapid Transit Systems, Virginia Tech - Center for Rapid Transit Systems

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