Journal ArticleDOI
One-Cycle-Controlled Single-Stage Single-Phase Voltage-Sensorless Grid-Connected PV System
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TLDR
An OCC-based grid-connected single-stage PV system is proposed in this paper which does not require to sense the grid voltage and requires less number of sensors as compared to that required in the earlier reported scheme.Abstract:
Reforms in the electricity sector along with various renewable-energy-promotion policies have increased the importance of small grid-connected photovoltaic (PV) systems utilizing single-stage single-phase inverters. Ruggedness, reliability, and cost effectiveness are the desirable characteristics of such inverters used in distributed low-power applications. Schemes based on one-cycle control (OCC) which do not require the service of a phase-locked loop for interfacing the inverter to the grid are increasingly being employed for such applications. However, the OCC-based schemes reported earlier require sensing of the grid voltage which somewhat offsets one of the inherent strengths of OCC-based systems. In an effort to overcome the aforementioned limitation, an OCC-based grid-connected single-stage PV system is proposed in this paper which does not require to sense the grid voltage. Further, it requires less number of sensors (two) as compared to that required (four) in the earlier reported scheme for the implementation of the core controller comprising of OCC and maximum-power-point-tracking blocks. The viability of the proposed scheme is confirmed by performing simulation and experimental validation.read more
Citations
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Journal ArticleDOI
Topology Review and Derivation Methodology of Single-Phase Transformerless Photovoltaic Inverters for Leakage Current Suppression
TL;DR: The generation mechanism of leakage current is investigated and the concepts of dc-based and ac-based decoupling networks are proposed to not only cover the published symmetrical inductor-based topologies but also offer an innovative strategy to derive advanced inverters.
Journal ArticleDOI
Maximum power point tracking (MPPT) techniques: Recapitulation in solar photovoltaic systems
TL;DR: In this article, a state-of-the-art analysis of the available maximum power point tracking (MPPT) techniques and their comprehensive comparative analysis based on 110 standard research articles is presented.
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Novel High Step-Up DC–DC Converter With Coupled-Inductor and Switched-Capacitor Techniques
TL;DR: A novel high step-up dc-dc converter with coupled-inductor and switched-capacitor techniques is proposed, which can achieve highstep-up voltage gain with appropriate duty ratio and reduce the conduction loss.
Journal ArticleDOI
An Energy-Stored Quasi-Z-Source Inverter for Application to Photovoltaic Power System
Baoming Ge,Haitham Abu-Rub,Fang Zheng Peng,Qin Lei,A.T. de Almeida,Fernando J. T. E. Ferreira,Dongsen Sun,Yushan Liu +7 more
TL;DR: Two strategies are proposed with the related design principles to control the new energy-stored qZSI when applied to the PV power system and prove the effectiveness of the proposed control of the inverter's input and output powers and battery power regardless of the charging or discharging situation.
Journal ArticleDOI
Analysis and Implementation of a Single-Stage Flyback PV Microinverter With Soft Switching
TL;DR: This paper presents a novel zero-voltage switching (ZVS) approach to a grid-connected single-stage flyback inverter, and experimental results confirm the feasibility and superior performance of the converter compared with the conventional fly back inverter.
References
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A Variable Step Size INC MPPT Method for PV Systems
TL;DR: A modified variable step size INC MPPT algorithm is proposed, which automatically adjusts the step size to track the PV array maximum power point and can effectively improve the MPPT speed and accuracy simultaneously.
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A review on global solar energy policy
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Proceedings ArticleDOI
Direct power control of PWM converter without power source voltage sensors
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A New High-Efficiency Single-Phase Transformerless PV Inverter Topology
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Simple direct power control of three-phase PWM rectifier using space-vector modulation (DPC-SVM)
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