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Title: Discrete Time Nested-Loop Controller for the Output Stage of a Photovoltaic Microinverter
Authors: López-Santos, Oswaldo
Cortes-Torres, Luis
Tilaguy-Lezama, Sebastián
Keywords: Microinverter
Two-stage microinverter
Cascade control
Nested-loop controller
Issue Date: 1-Jan-2017
Publisher: Communications in Computer and Information Science
Citation: Lopez-Santos O., Cortes-Torres L., Tilaguy-Lezama S. (2016) Discrete Time Nested-Loop Controller for the Output Stage of a Photovoltaic Microinverter. In: Figueroa-García J., López-Santana E., Ferro-Escobar R. (eds) Applied Computer Sciences in Engineering. WEA 2016. Communications in Computer and Information Science, vol 657.
Abstract: This paper presents a comprehensive study of the digital implementation of the control requirements of the output stage of a two-stage solar microinverter. This approach uses a synchronized nested-loop controller which ensures the tracking of an internally generated high-quality current reference, the estimation and cancelation of the effect of the DC-link voltage ripple in the control loops and the regulation of the average value of the DC-link voltage. The proposed control architecture is validated by means of simulation results comparing operation of the inverter using continuous time, quasi-discrete time and discrete time implementations.
ISSN: 1865-0929
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