Title :
A single-phase current-source inverter with active power filter for grid-tied PV systems
Author :
Román, Ignacio Toledo ; Silva, Lautaro Salazar
Author_Institution :
Dept. of Electr. Eng., Univ. of Concepcion, Concepcion, Chile
Abstract :
This work presents a new power decoupling technique for grid-tied current-source inverter (CSI), in grid-connected photovoltaic (PV) systems. Single-phase converters have low-frequency power ripple in the dc-link. The proposed topology is intended to reduce the low frequency power ripple by using an active power filter (APF) on the dc-link, based on a bidirectional buck-boost converter, which provides compensating voltage in a very simple but effective way. The advantages of this configuration are: a) dc-link ripple minimization, b) passive components size reduction, c) improvement of maximum power point tracking (MPPT) performance; and d) compatibility with full range of CSI modulation index (0~1).
Keywords :
active filters; invertors; maximum power point trackers; photovoltaic power systems; power filters; power grids; APF; CSI modulation index; MPPT performance; active power filter; bidirectional buck-boost converter; dc-link ripple minimization; grid-connected photovoltaic system; grid-tied PV systems; grid-tied current-source inverter; low-frequency power ripple; maximum power point tracking; passive component size reduction; power decoupling technique; single-phase converters; single-phase current-source inverter; voltage compensation; Active filters; Capacitors; Inductors; Inverters; Modulation; Switches; Topology; current source inverter; grid-connected system; power decoupling;
Conference_Titel :
Power Electronics for Distributed Generation Systems (PEDG), 2012 3rd IEEE International Symposium on
Conference_Location :
Aalborg
Print_ISBN :
978-1-4673-2021-4
Electronic_ISBN :
978-1-4673-2022-1
DOI :
10.1109/PEDG.2012.6254025
