2016
DOI: 10.1049/iet-rpg.2015.0101
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Abstract: Photovoltaic (PV) power systems have been in the spotlight of scientific research for years. However, this technology is still undergoing developments, and several new architectures are proposed each year. This study describes the main challenges facing grid-connected PV systems without galvanic isolation, then carries out a review of the state-of-the-art of single-phase systems. The converter topology review is focused on the match between the different types of converters and the different PV panel technolog… Show more

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Cited by 126 publications
(65 citation statements)
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“…Differently from the simulations, where the devices performed ideal commutations and presented no parasitic elements, in the experiments a small common-mode voltage variation happens. This phenomenon is the same behavior of a bipolar H-bridge performing non-ideal commutations in a PV inverter: a small common-mode current flows [11]. This problem can be addressed via a careful optimization of the circuit layout and the equalization of the pulse times.…”
Section: Resultsmentioning
confidence: 96%
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“…Differently from the simulations, where the devices performed ideal commutations and presented no parasitic elements, in the experiments a small common-mode voltage variation happens. This phenomenon is the same behavior of a bipolar H-bridge performing non-ideal commutations in a PV inverter: a small common-mode current flows [11]. This problem can be addressed via a careful optimization of the circuit layout and the equalization of the pulse times.…”
Section: Resultsmentioning
confidence: 96%
“…Hard-grounding of the power bus is one of the possibilities to reduce the common-mode noise at the user interface [10]. However, as a common power ground exists, common-mode currents can flow between the converters, in a similar fashion to what happens in the low-voltage grids with the Terra-Terra (TT, doubly grounded) distribution system, where each converter shares the same ground [11]. These currents must be minimised as well, calling for low-commonmode power converters.…”
Section: Introductionmentioning
confidence: 99%
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“…The CM voltage affects the load when the parasitic capacitor is non-negligible, such as PV panel connecting to the ST [27].…”
Section: B CM and Dm Characteristic Of St-fed Gridsmentioning
confidence: 99%
“…Various grid-connected photovoltaic system concepts and topologies have been summarized previously [1][2][3][4]: (i) micro inverters [5,6]; (ii) residential systems supplied from a PV string [7,8]; (iii) commercial/residential systems supplied from multiple PV strings having their own maximum power point tracking (MPPT) converters and a central inverter [9,10]; and (iv) commercial/utility-scale PV plants supplied from a common DC link with a central inverter [11]. The central inverter in [11] performs direct conversion of PV power to AC from multiple PV strings.…”
Section: Introductionmentioning
confidence: 99%