Journal ArticleDOI
Flyback inverter controlled by sensorless current MPPT for photovoltaic power system
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TLDR
The paper shows that the application of this novel sensorless current flyback inverter to an MPPT-operated PV system exhibits satisfactory MPPT performance similar to the one exhibited by the system with a dc current sensor as well.Abstract:
This paper presents a flyback inverter controlled by sensorless current maximum power point tracking (MPPT) for a small photovoltaic (PV) power system. Although the proposed system has small output power such as 300 W, a few sets of small PV power systems can be easily connected in parallel to yield higher output power. When a PV power system is constructed with a number of small power systems, the total system cost will increase and will be a matter of concern. To overcome this difficulty, this paper proposes a PV system that uses no expensive dc current sensor but utilizes the method of estimating the PV current from the PV voltage. The paper shows that the application of this novel sensorless current flyback inverter to an MPPT-operated PV system exhibits satisfactory MPPT performance similar to the one exhibited by the system with a dc current sensor as well. This paper also deals with the design method and the operation of the unique flyback inverter with center-tapped secondary winding.read more
Citations
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Journal ArticleDOI
Fault Ride-Through Capability Enhancement for Microinverter Applications
TL;DR: The results indicate the fact that the flyback inverter at BCM condition can provide LVRT capability for photovoltaic microinverter applications in distributed generation (DG) systems, even though it does not need any auxiliary control branches and any limitations in components design.
Proceedings ArticleDOI
Ground leakage current elimination in a transformerless unipolar modulation based single phase grid-connected photovoltaic system
TL;DR: In this article, an optimized full-bridge topology is proposed to solve the problem of variable common-mode voltage in transformerless grid-connected photovoltaic (PV) inverter, which uses an additional branch to be clamped the potential of the freewheeling path to the half of the input voltage in the free-heeling period.
Proceedings ArticleDOI
Maximum power point tracking of photovoltaic systems using sensorless current-based model predictive control
TL;DR: In this paper, a model-based predictive control (MPC-MPPT) algorithm is proposed to eliminate the current sensor that is usually required in the perturb and observe (P&O) MPPT technique.
Dissertation
High-frequency transformer isolated power conditioning system for fuel cells to utility interface
TL;DR: This thesis presents interfacing of fuel cells to a single-phase utility line using a highfrequency transformer isolated power converter to realize a low cost, small size and light weight system.
Journal ArticleDOI
A Phase-Shift-Modulated LLC-Resonant Micro-Inverter Based on Fixed Frequency Predictive-MPPT
Omar Abdel-Rahim,Nehmedo Alamir,Mohamed Abdelrahem,Mohamed Orabi,Ralph Kennel,Mohamed A. Ismeil +5 more
TL;DR: A fixed frequency predictive MPPT technique is presented for the LLC resonant converter to be used as the first-stage in a PV micro-inverter, which enhances the tracking efficiency and reduces the steady state oscillation.
References
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Journal ArticleDOI
Implementation of a DSP-controlled photovoltaic system with peak power tracking
TL;DR: A simple method of tracking the maximum power points (MPPs) and forcing the system to operate close to these points is presented, and the principle of energy conservation is used to derive the large- and small-signal model and transfer function.
Journal ArticleDOI
Microcomputer Control of a Residential Photovoltaic Power Conditioning System
TL;DR: In this paper, a microcomputer-based control of a residential photovoltaic power conditioning system is described, which is responsible for array current feedback control, maximum power tracking control, array safe zone steering control, phase-locked reference wave synthesis, sequencing control, and some diagnostics.
Proceedings ArticleDOI
A flyback-type single phase utility interactive inverter with low-frequency ripple current reduction on the DC input for an AC photovoltaic module system
TL;DR: In this paper, a flyback-type utility interactive inverter is proposed for photovoltaic (PV) power generation systems, which allows stable AC current injection into the utility line without AC current sharing control.
Journal ArticleDOI
Maximum power point tracking with capacitor identifier for photovoltaic power system
N. Kasa,T. Lida,H. Iwamoto +2 more
TL;DR: In this paper, a perturbation and observation method with a capacitor identifier is presented for maximum power point tracking (MPPT) in a photovoltaic power system, where the model reference adaptive system is adapted to identify the capacitor, so the capacitance can be accurately estimated and the variation of the duty ratio can be corrected by the estimated value.
Journal ArticleDOI
Novel grid-connected photovoltaic inverter
S. Saha,V.P. Sundarsingh +1 more
TL;DR: In this article, the harmonic distortion of the output current waveform of the inverter fed to the grid is within the stipulated limits laid down by the utility companies, and the applicability of the design is verified.
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