A photovoltaic three-phase topology to reduce common mode voltage

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hdl:2117/11123
Document typeConference report
Defense date2010
Rights accessOpen Access
Abstract
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.
CitationVazquez, G. [et al.]. A photovoltaic three-phase topology to reduce common mode voltage. A: IEEE International Symposium on Industrial Electronics. "IEEE International Symposium on Industrial Electronics 2010". Bari: 2010, p. 2885-2890.
ISBN978-1-4244-6390-9
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