Abstract
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.
Originalsprog | Engelsk |
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Publikationsdato | 1 dec. 2003 |
Antal sider | 6 |
DOI | |
Status | Udgivet - 1 dec. 2003 |
Udgivet eksternt | Ja |
Begivenhed | the 29th Annual Conference of the IEEE Industrial Electronics Society, IECON 2003, Roanoke, Virginia, USA, 2003 - Roanoke, VA, USA Varighed: 2 nov. 2003 → 6 nov. 2003 Konferencens nummer: 29 |
Konference
Konference | the 29th Annual Conference of the IEEE Industrial Electronics Society, IECON 2003, Roanoke, Virginia, USA, 2003 |
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Nummer | 29 |
Land/Område | USA |
By | Roanoke, VA |
Periode | 02/11/2003 → 06/11/2003 |
Sponsor | IEEE Industrial Electronics Society, SICE, Vorginia Tech - Center for Rapid Transit Systems, Virginia Tech - Center for Rapid Transit Systems |