A Weighted-Efficiency-Oriented Design Methodology of Flyback Inverter for AC Photovoltaic Modules

Nanakos, Anastasios Ch.; Tatakis, Emmanuel C.; Papanikolaou, Nick

doi:10.1109/tpel.2011.2182211

Cited by 110 publications

(65 citation statements)

References 17 publications

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“…In this case, the equation for the input current is more complicated. However, in this paper, the input current is calculated more simply by using the average current in the DCM operation by (8) and in the BCM operation by (9). The MPPT control method uses the calculated average current which is divided by a half-grid period.…”

Section: Current Sensorless Mppt Control Methods For the Pv Modulmentioning

confidence: 99%

“…Third, it provides maximum efficiency at the maximum power point (MPP) and can reduce the price of the inverters because they can be produced on a large scale. Therefore, many studies on the MIC have been reported recently [8], [9].…”

Section: Introductionmentioning

confidence: 99%

“…Generally, the DCM operation is used to control ILFIs because it is very simple. Furthermore, this mode can reduce the frequency-dependent, turn-off, and transformer core losses at light loads [8]. Fig.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the BCM operation is more complicated than the DCM operation. However, when the load is heavy, the BCM operation is more suitable than the DCM operation because the transformer loss and size can both be reduced [8]. The system used in this paper operates in the dual mode by taking advantage of both modes.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Current Sensorless MPPT Control Method for Dual-Mode PV Module-Type Interleaved Flyback Inverters

Lee¹,

Lee²,

Lee³

2015

Journal of Power Electronics

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This paper presents a current sensorless maximum power point tracking (MPPT) control method for dual-mode photovoltaic (PV) module-type interleaved flyback inverters (ILFIs). This system, called the MIC (Module Integrated Converter), has been recently studied in small PV power generation systems. Because the MIC is an inverter connected to one or two PV arrays, the power system is not affected by problems with other inverters. However, since the each PV array requires an inverter, there is a disadvantage that the initial installation cost is increased. To overcome this disadvantage, this paper uses a flyback inverter topology. A flyback inverter topology has an advantage in terms of cost because it uses fewer parts than the other transformer inverter topologies. The MPPT control method is essential in PV power generation systems. For the MPPT control method, expensive dc voltage and current sensors are used in the MIC system. In this paper, a MPPT control method without current sensor where the input current is calculated by a simple equation is proposed. This paper also deals with dual-mode control. Simulations and experiments are carried out to verify the performance and effectiveness of the proposed current sensorless MPPT control method on a 110 [W] prototype.

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Section: Current Sensorless Mppt Control Methods For the Pv Modulmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Current Sensorless MPPT Control Method for Dual-Mode PV Module-Type Interleaved Flyback Inverters

Lee¹,

Lee²,

Lee³

2015

Journal of Power Electronics

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“…A lot of research has focused on the tlyback MIC with a pseudo-dc link (FMICpseudo-dc) [1], [4]- [9]. It has proven to be an attractive topology because of its relatively low component count which offers the possibilities of high power density, lower losses, and better reliability [1], [10].…”

Section: Introductionmentioning

confidence: 99%

A powertrain loss model for the flyback AC module with pseudo-dc link in continuous conduction mode

Fonkwe

Kirtley

Owusu-Akyaw

2015

2015 International Conference on Smart Grid and Clean Energy Technologies (ICSGCE)

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AC modules or micro-inverters (MIC) are an important part of photovoltaic (PV) power systems. In particular, the fly back MIC with a current-unfolder, otherwise known as flyback MIC with pseudo-dc link (FMICpseudo-dc), has attracted a lot of research interest. The objective of this paper is to propose a compact theoretical loss model for the power train when the FMICpseudo-dc operates in the continuous conduction mode (CCM). The theoretical evaluation is compared with experimental results for a HOW digitally-controlled prototype. The loss model shows a good match with the experimental results in the mid-to-nominal power regions.

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A new adaptive clamp for improving weighted efficiency in grid‐tied photovoltaic interleaved two‐switch flyback micro‐inverter

Mohammadi

Izadfar

Eskandarian

2019

Int Trans Electr Energ Syst

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Summary This paper proposes a new adaptive clamp based on the hybrid operation of the interleaved two‐switch flyback micro‐inverter in one‐phase and two‐phase discontinuous conduction modes (DCM) depending on the output power of the PV panel. The proposed adaptive clamp controls the second switch of the two‐switch flyback structure based on the drain‐to‐source voltage spike of the flyback's main switch during the turn‐off process. Thus, in low‐voltage regions, a conventional flyback (single‐switch) operation is achieved with reduced switching, gate driving, and clamp diodes losses. Also, in the low output powers of the micro‐inverter, only one phase of the micro‐inverter operates to decrease the power loss associated with one phase. The theoretical analysis, simulation, and experimental results show the effectiveness of the proposed adaptive clamp and the phase control methods in improving the efficiency in all power ranges.

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A Weighted-Efficiency-Oriented Design Methodology of Flyback Inverter for AC Photovoltaic Modules

Cited by 110 publications

References 17 publications

Current Sensorless MPPT Control Method for Dual-Mode PV Module-Type Interleaved Flyback Inverters

Current Sensorless MPPT Control Method for Dual-Mode PV Module-Type Interleaved Flyback Inverters

A powertrain loss model for the flyback AC module with pseudo-dc link in continuous conduction mode

A new adaptive clamp for improving weighted efficiency in grid‐tied photovoltaic interleaved two‐switch flyback micro‐inverter

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