A Novel Analog Circuit Design for Maximum Power Point Tracking of Photovoltaic Panels Nesrine Mhiri, Abdulrahman Alahdal, Hamza Ghulman, and Anis Ammous Power Electronics Group (PEG), National School of Engineers of Sfax, University of Sfax, Sfax, Tunisia 2DEE, Umm Al Qura University, Makkah, Saudi Arabia

 

A Novel Analog Circuit Design for Maximum Power Point Tracking of Photovoltaic Panels Nesrine Mhiri,1 Abdulrahman Alahdal,2 Hamza Ghulman,2 and Anis Ammous1,2 Power Electronics Group (PEG), National School of Engineers of Sfax, University of Sfax, Sfax, Tunisia DEE, Umm Al Qura University, Makkah, Saudi Arabia Correspondence should be addressed to Anis Ammous; aaammous@uqu.edu.sa Received 7 April 2017; Revised 20 June 2017; Accepted 26 July 2017; Published 25 September 2017 Academic Editor: Mohamed Orabi Copyright © 2017 Nesrine Mhiri et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. A new analog technique is proposed in order to track the maximum power point (MPP) of PV panels. The proposed technique uses the well-known simple functions of electronic circuits. The proposed technique is validated by applying it to boost based off grid PV system. The simulation of the PV system was done on the circuit oriented simulator Proteus-ISIS. A good efficiency of the analog technique (more than 98%) was registered. The variation of irradiation was introduced in order to study the robustness of the proposed analog MPPT technique.

LINK: https://downloads.hindawi.com/archive/2017/9409801.pdf

Integrated Magnetic Component of a Transformer and a Magnetically Coupled Inductor for a Three-Port DC-DC Converter Shuntaro Inoue, Kenichi Itoh, Masanori Ishigaki, Takahide Sugiyama 2020 Volume 9 Issue 6 Pages 713-722 IEEJ Journal of Industry Applications

 Integrated Magnetic Component of a Transformer and a Magnetically Coupled Inductor for a Three-Port DC-DC Converter Shuntaro Inoue, Kenichi Itoh, Masanori Ishigaki, Takahide Sugiyama 2020 Volume 9 Issue 6 Pages 713-722 IEEJ Journal of Industry Applications 

ABSTRACT

 This paper discusses a design method for a proposed integrated magnetic component for an isolated bidirectional three-port DC-DC converter (TPC). TPC comprises a dual active bridge converter (DAB) and a non-isolated bidirectional DC-DC converter (NBC); each converter is independently controlled with a transformer and a magnetically coupled inductor. To reduce the size of the magnetic components, an integrated magnetic component that can integrate a magnetically coupled inductor and a transformer is implemented. A 750-W magnetically integrated TPC prototype was constructed and tested to validate the operation. The experimental results show that the efficiency of the integrated TPC is above 90% for the entire output power range, which is nearly equal to that of the conventional magnetic component. As a result, the proposed component was 10% smaller than the conventional magnetic components, and the overall size of the integrated TPC was 33% smaller than that of the conventional one.

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https://www.jstage.jst.go.jp/article/ieejjia/9/6/9_19005951/_pdf/-char/en

Load Current Distribution between Parallel Inverters based on Capacitor Voltage Control for UPS Applications Mohammad Bani Shamseh, Teruo Yoshino, Atsuo Kawamura--IEEJ Journal of Industry Applications-

Load Current Distribution between Parallel Inverters based on Capacitor Voltage Control for UPS Applications Mohammad Bani Shamseh, Teruo Yoshino, Atsuo Kawamura Author information 

IEEJ Journal of Industry Applications 

Abstract

 Many challenges are encountered when uninterruptible power supply (UPS) modules are operated in parallel to meet the power demand of the load. The circulating current is one prominent example of these challenges that may cause serious damage to equipment. Hence, control algorithms must ensure that the current is shared equally or in proportion to the power ratings of the parallel inverters, while mitigating the circulating current. Another challenge is that all parallel inverters should have equal output voltage, phase, and frequency. This paper proposes a new method to control parallel UPS modules. The method is based on regulating the capacitor voltage of the LCL output filter of each inverter to indirectly control its output current. The method can achieve high accuracy in terms of equal current distribution between the power sources. Simulation and experimental results are presented to verify the theoretical analysis.

LINK FREE WEB:

https://www.jstage.jst.go.jp/article/ieejjia/6/4/6_258/_article

Projeto e análise de rendimento de uma UPS monofásica de três braços e construção de um calorímetro fechado de dupla caixa-Autor:Renato Atila Silva Santana---Universidade Federal de Minas Gerais Escola de Engenharia Programa de Pós-Graduação em Engenharia Elétrica

 Abstract: An UPS is an equipment that provides continuous power supply, with high levels of quality and reliability. This equipment is usually employed for supplying mission-critical systems, in which disturbances or power interruptions can cause financial losses or damages (e.g., hospitals, bank offices, datacenters, etc.). In the literature, several topologies have been proposed as an alternative to the classical configuration with low-frequency transformers, as a solution for enhancing efficiency and power density and decreasing overall costs. Among these alternatives, transformerless solutions (i.e., without transformers) become promising, as they do not require low-frequency transformers which comprise an expressive part of overall weight and volume of a conventional UPS. In this context, a three-arm UPS is often reported as a suitable transformerless topology for low- and medium-power single-phase UPS, with high efficiency and power density. This thesis aimed to assess the performance of the single-phase three-arm UPS, concerning efficiency and power density. An alternative connection for battery set was also evaluated. Furthermore, a prototype of a direct double-jacketed calorimeter was built in order to measure the losses of power converters. The adopted methodology was based on the comparison of several three-arm UPS designs with devices made by different materials (silicon, silicon carbide and gallium nitride) and of various technologies (IGBTs, MOSFETs and cascode configuration with silicon MOSFET and GaN HFET) and packages (TO-247-3, TO-247-4, SMT top and HSOF-8). The UPS was also simulated in MATLAB/Simulink, in order to validate the modulation strategies and the techniques adopted for controlling, synchronizing and commutating between the normal state and the stored energy mode, as well as the alternative connection of the battery set. These simulations demonstrated the operation in asynchronous and synchronous modes, i.e., with an output frequency that can be decoupled or not to the means frequency. All details related to construction, dimensioning and calibration of the double-jacketed calorimeter were also presented. Preliminary experimental results were also discussed in this thesis.

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https://repositorio.ufmg.br/bitstream/1843/RAOA-BC2HSD/1/main_dissertacao_renato_atila_silva_santana.pdf

A Practical Guide for Advanced Methods in Solar Photovoltaic Systems editado por Adel Mellit, Mohamed Benghanem- GOOGLE BOOK DEMO