Ground currents in single‐phase transformerless photovoltaic systems

By E. Gubía, Pablo Sanchis, Alfredo Ursua, Jesús López, Luis Marroyo. 2007

335 citations recorded by the source corpus.

Subfields: Control and Systems Engineering, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/f03808d8d36f9677c945d096fdfc22dc78d84d38

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In Control and Systems Engineering

In Electrical and Electronic Engineering

Citations in the corpus

Transformerless Inverter Topologies for Single-Phase Photovoltaic Systems: A Comparative Review (2020, background): “This topology is introduced in [48], and it is operated in four”
Common mode voltage in case of transformerless PV inverters connected to the grid (2008, background): “In case the Neutral line is connected, from the point of view of the common-mode model, the three-phases of the inverter can be modeled as three individual single-phases, as presented in [12] and the result is a constant total common-mode voltage, leading to very low leakage ground current, as shown”
An Optimized Transformerless Photovoltaic Grid-Connected Inverter (2011, background): “Under the premise of filter inductor symmetric placement in phase line and neutral line, the ground current of the unipolar SPWM full-bridge inverter depends on the frequency and amplitude of the common-mode voltage vCM [11], [12].”
Transformerless Single-Phase Multilevel-Based Photovoltaic Inverter (2008, methodology): “Characteristically, with this topology, the inverter inductor is connected to a single grid terminal (L2 = 0), obtaining a constant total common-mode voltage [4].”
A New High-Efficiency Single-Phase Transformerless PV Inverter Topology (2011, background): “As discussed in previous works [8], [11], the common-mode voltage generated by a topology and modulation strategy can greatly influence the ground leakage current that flows through the parasitic capacitance of the PV array.”
Modulation Techniques to Eliminate Leakage Currents in Transformerless Three-Phase Photovoltaic Systems (2010, background): “1(a), a resonant circuit is created if the PV array is grounded [3], [4].”
Transformerless Inverter With Virtual DC Bus Concept for Cost-Effective Grid-Connected PV Power Systems (2013, background): “However, if the transformer is omitted, the common-mode (CM) ground leakage current may appear on the parasitic capacitor between the PV panels and the ground [7], [8].”