abstract

• This paper proposes a sizing approach for the passive components of a photovoltaic (PV) full-bridge dc-dc converter connected to a full bridge inverter and an LCL filter with grid connection. An expression for the PV capacitor is derived from the rms voltage equation at the terminals of the PV array. A polynomial method based on a frequency domain analysis of the LCL circuit is developed to select the inductance values of the filter. A damping resistance is added in series with the filter capacitor to reduce the resonance peak and to improve the stability margin of the control system. The dc-link capacitor is obtained from an expression that calculates the ripple magnitude of the second order harmonic, and its sizing takes into account not only the active power processed, but also the maximum amount of reactive power that the converter will manage. The control scheme has three objectives: the maximum power extraction from the PV array, the dc-link voltage regulation, and both active power injection and reactive power management interacting with the grid. The proposed sizing procedure is validated via simulation in a 1.41 kVA converter. © 2021 IEEE.

authors

• Álvarez Salas Claudia

publication date

• 2021-01-01

published in

• 2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings  Proceedings

keywords

• full bridge dc-dc converter; grid-connected; LCL filter; photovoltaic power system; reactive power; Sizing DC-DC converters; Electric inverters; Electric power system control; Electric power transmission networks; Frequency domain analysis; Power management; Reactive power; Voltage regulators; Active power; Full-bridge dc/dc converters; Grid-connected; LCL filters; Photovoltaic arrays; Photovoltaic power systems; Photovoltaics; Reactive power management; Single phasis; Sizing; Solar cells

Digital Object Identifier (DOI)

• 10.1109/ECCE47101.2021.9596049

PubMed ID

start page

• 23

end page

• 29

volume

issue