INVESTIGATION OF BRIDGELESS SINGLE-PHASE SOLUTIONS FOR AC-DC POWER FACTOR CORRECTED CONVERTERS by Muntasir Ul Alam. -THE UNIVERSITY OF BRITISH COLUMBIA

 INVESTIGATION OF BRIDGELESS SINGLE-PHASE SOLUTIONS FOR AC-DC POWER FACTOR CORRECTED CONVERTERS

 by Md. Muntasir Ul Alam M.E.Sc., Western University, 2010 B.Sc., Islamic University of Technology, 2006

 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY in The College of Graduate Studies (Electrical Engineering) 

THE UNIVERSITY OF BRITISH COLUMBIA (Okanagan) July 2017 

LINK :https://open.library.ubc.ca/cIRcle/collections/ubctheses/24/items/1.0348980

High Efficiency GaN FET based Flexible Electrical Power System for Cube-Satellites using Pulse Frequency Modulation by Ashish Sanjay Shrivastav

 

High Efficiency GaN FET based Flexible Electrical Power System for Cube-Satellites using Pulse Frequency Modulation by Ashish Sanjay Shrivastav 

A thesis submitted to the Graduate Faculty of North Carolina State University in partial fulfillment of the requirements for the Degree of Master of Science Electrical Engineering Raleigh, North Carolina 2016

ABSTRACT

 CubeSats, miniature satellites, are playing an increasingly larger role in space exploration, technology demonstrations, scientific research and educational investigations. These miniature satellites provide a low-cost platform for various missions, including planetary space exploration; Earth observation; fundamental Earth and space science; and technology demonstrations such as cutting-edge laser communications, energy storage, in-space propulsion and autonomous movement capabilities. They also allow educators an inexpensive means to engage students in all phases of satellite development, operation and exploitation through real-world, hands-on research and development experience. There has been a rising emergence of researchers, universities and professional institutions constituting towards the development and launching of these CubeSats. CubeSat is a generic term for a miniature satellite which is designed using commercial offthe-shelf components for development of its electronics framework [1] which capcitates anyone to build a satellite. A CubeSat has a volume of 1 liter, which translates into a cube having a 10 cm edge. A typical CubeSat weighs approximately 1 kilogram. The most remarkable feature of such satellites is the simplified development cycle; the use of off-the-shelf hardware and easy access to software resources has led to rapid rise in the number of the CubeSats deployed. They provide an economic approach for academia to contribute towards space research. CubeSats are highly modular and can be used to form larger satellites. The electrical system of a CubeSat is driven by the EPS, the powerhouse of the CubeSat. It is responsible for powering the various components of the CubeSat which includes the control unit, servo mechanisms, scientific equipment and communication modules.

LINK: https://research.ece.ncsu.edu/bhattacharya/wp-content/uploads/2019/07/etd34.pdf

A Comprehensive Review of DC–DC Converter Topologies and Modulation Strategies with Recent Advances in Solar Photovoltaic Systems by Kummara Venkat Guru Raghavendra ,Kamran Zeb ,Anand Muthusamy ,T.N.V.Krishna,S.V.S.V Prabhudeva Kumar,Do-Hyun Kim,Min-Soo Kim,Hwan-Gyu Cho and Hee-Je Kim

 

A Comprehensive Review of DC–DC Converter Topologies and Modulation Strategies with Recent Advances in Solar Photovoltaic Systems by Kummara Venkat Guru Raghavendra ,Kamran Zeb ,Anand Muthusamy ,T.N.V.Krishna,S.V.S.V Prabhudeva Kumar,Do-Hyun Kim,Min-Soo Kim,Hwan-Gyu Cho and Hee-Je Kim 

 School of Electrical Engineering, Pusan National University, Korea School of Electrical Engineering and Computer Science, National University of Sciences and Technology, Pakistan 

 Abstract

 Renewable Energy Sources (RES) showed enormous growth in the last few years. In comparison with the other RES, solar power has become the most feasible source because of its unique properties such as clean, noiseless, eco-friendly nature, etc. During the extraction of electric power, the DC–DC converters were given the prominent interest because of their extensive use in various applications. Photovoltaic (PV) systems generally suffer from less energy conversion efficiency along with improper stability and intermittent properties. Hence, there is a necessity of the Maximum power point tracking (MPPT) algorithm to ensure the maximum power available that can be harnessed from the solar PV. In this paper, the most important features of the DC/DC converters along with the MPPT techniques are reviewed and analyzed. A detailed comprehensive analysis is made on different converter topologies of both non-isolated and isolated DC/DC converters. Then, the modulation strategies, comparative performance evaluation are addressed systematically. At the end, recent advances and future trends are described briefly and considered for the next-generation converter’s design and applications. This review work will provide a useful structure and reference point on the DC/DC converters for researchers and designers working in the field of solar PV applications.

View Full-Text: https://www.mdpi.com/2079-9292/9/1/31

Keywords: DC/DC converter; control; MPPT; photovoltaic (PV) systems; modulation strategies

Topologies and control strategies of multi-functional grid-connected inverters for power quality enhancement:A comprehensive review Zheng Zengn, HuanYang , Rongxiang Zhao , Chong Cheng College of Electrical Engineering,Zhejiang University,China

 

Topologies and controlstrategies of multi-functional grid-connected inverters for power quality enhancement:Acomprehensive review Zheng Zengn, HuanYang , RongxiangZhao , ChongCheng College ofElectrical Engineering,Zhejiang University,China

 LINK:https://www.academia.edu/5616217/Topologies_and_control_strategies_of_multi_functional_grid_connected_inverters

Investigation of single-stage transformerless buck–boost microinverters Derick Mathew, Rani Chinnappa Naidu Electrical Engineering, VIT University, Vellore, Tamil Nadu, India

Investigation of single-stage transformerless buck–boost microinverters Derick Mathew, Rani Chinnappa Naidu Electrical Engineering, VIT University, Vellore, Tamil Nadu, India

 Abstract: 

conventional microinverters with transformers and multiple-stage system increases the cost, weight and size, lowering the effectiveness and power density of PV system. It is therefore desirable to prevent using these methods for a microinverter. However, extra care must be taken to prevent component stress, excess switching and conduction losses, ground leakage currents and harmonics. Several transformerless buck–boost inverters have lately been suggested to address various issues. Due to the availability of a number of buck–boost inverter-topology for the solar PV system, it is often difficult to identify when to choose the appropriate topology. Therefore, in order to present a clear view of the advancement of transformerless buck–boost inverters for next-generation grid-integrated PV systems, this article seeks to explore multiple buck–boost topologies with an extensive analytical comparison. Computer simulations for the 70 W system have been conducted in PLECS software to strengthen the results and comparisons, as well as to provide more insight into the features of the distinct topologies for the building-integrated photovoltaic implementation. At the later part, voltage and current stress in each component, efficiency and total harmonic distortion of the system are provided with a general summary, as well as, a technology roadmap.

LINK WEB:

https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/iet-pel.2019.1237