Adaptive Droop Control Applied to Voltage-Source Inverters Operating in Grid-Connected and Islanded Modes
Vasquez, J.C.
Guerrero, J.M.
Luna, A.
Rodriguez, P.
Teodorescu, R.
Dept. of Autom. Control Syst. & Comput. Eng., Univ. Politec. de Catalunya, Barcelona, Spain;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Oct. 2009
Volume: 56,
Issue: 10
On page(s): 4088-4096
ISSN: 0278-0046
INSPEC Accession Number: 10869405
Digital Object Identifier: 10.1109/TIE.2009.2027921
First Published: 2009-07-28
Current Version Published: 2009-09-15
Abstract
This paper proposes a novel control for voltage-source inverters with the capability to flexibly operate in grid-connected and islanded modes. The control scheme is based on the droop method, which uses some estimated grid parameters such as the voltage and frequency and the magnitude and angle of the grid impedance. Hence, the inverter is able to inject independently active and reactive power to the grid. The controller provides a proper dynamics decoupled from the grid-impedance magnitude and phase. The system is also able to control active and reactive power flows independently for a large range of impedance grid values. Simulation and experimental results are provided in order to show the feasibility of the control proposed.
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