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
Hybrid Discontinuous/Boundary Conduction Mode of Flyback Microinverter for AC–PV Modules
TL;DR: In this article, a hybrid operating mode that combines both discontinuous conduction mode (DCM) and boundary conduction (BCM) during a utility grid period is presented, which improves converter performance as well as the efficiency and the power density on a wider power range.
Proceedings ArticleDOI
Hysteresis Current Control and Sensorless MPPT for Grid-Connected Photovoltaic Systems
TL;DR: This paper describes a control method for single-phase transformerless grid-connected inverter system for photovoltaic (PV) application that provides robust current regulation, achieve unity power factor, low THD and optimize the PV energy extraction suitable for grid connected PV systems.
Journal ArticleDOI
Weighted Efficiency Optimization of Flyback Microinverter Under Improved Boundary Conduction Mode (i-BCM)
TL;DR: In this paper, a design methodology is presented, that maximizes the weighted efficiency of the converter through an optimization algorithm, and the inverter operation is investigated and the behavior under the improved boundary condition mode is documented by analytical equations followed by the power loss calculations for each component.
Journal ArticleDOI
A Novel Approach in Studying the Effects of Subharmonics on Ultrahigh-Speed AC Motor Drives
TL;DR: The finding is the contrary, subharmonics can cause significant additional losses that might lead even to breakdown in special cases like USIMs applied in systems developed for renewable and waste energy recovery.
Journal ArticleDOI
An Efficient and Cost-Effective Hybrid MPPT Method for a Photovoltaic Flyback Microinverter
TL;DR: The results prove the effectiveness of the proposed hybrid MPPT compared with the P$\&$ O method under uniform and dynamic weather conditions.
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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