Digital resonant controller for dual-stage photovoltaic inverter system with small dc-bus capacitor

作者：de Oliveira Reiter Renan Diego; Garcia Oliveira Sergio Vidal; Peres Adriano; Michels Leandro

来源：IET Power Electronics, 2016, 9(6): 1315-1321.

DOI：10.1049/iet-pel.2015.0489

Electrolitic capacitors of dc-bus link normally present the lowest mean time between failures among other electronic components of photovoltaic (PV) inverters. This manuscript proposes to increase inverter reliability using a dual-stage PV inverter system with small dc-bus link film capacitors, where a high-gain high-frequency isolated step-up dc-dc converter processes the energy from PV arrays. This converter topology in combination with a digital resonant control strategy for elimination of the low-frequency power ripple in PV array makes possible reducing dc-bus link capacitance without reduction of power extracted from PV system. The proposed control system is explained in detail, including experimental validation.

• 出版日期2016-5-18