2026-04-18T00:19:59Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/111232026-01-25T02:17:20Zcom_2072_1033col_2072_452950

A photovoltaic three-phase topology to reduce common mode voltage Vázquez Guzmán, Gerardo Kerekes, Tamas Rocabert Delgado, Joan Rodríguez Cortés, Pedro Teodorescu, Remus Aguilar, Daniel Àrees temàtiques de la UPC::Energies::Energia solar fotovoltaica::Captadors solars Àrees temàtiques de la UPC::Enginyeria electrònica::Electrònica de potència::Convertidors de corrent elèctric Photovoltaic power generation Electric current converters Convertidors de corrent elèctric Energia solar fotovoltaica At the present time most of the photovoltaic (PV) applications require to be integrated to the electrical grid. There are mainly two types of PV systems: with galvanic isolation (transformer) and transformerless. PV systems with low frequency transformer provide galvanic isolation from the grid. However, this transformer increases the losses, size and cost. On the other side, when the transformer is not included, the system can generate strong ground currents which are a function of the stray elements (capacitances). In this sense reducing the Common Mode Voltage (CMV), is an important issue in the design of power electronics converters for transformerless PV applications. In this paper a three-phase transformerless PV inverter with reduce common mode voltage is introduced. CMV is analyzed under different modulation schemes and an analysis of losses using a real model of the IGBT´s is included. Peer Reviewed Postprint (published version) 2010 Conference report http://creativecommons.org/licenses/by-nc-nd/3.0/es/ Open Access Attribution-NonCommercial-NoDerivs 3.0 Spain