Development of 3kW Hybrid ESS with Function of Emergency Power Supply-Authors 양석현(Seok-Hyun Yang) ; 김민재(Min-Jae Kim) ; 최세완(Se-Wan Choi) ; 조준석(Jun-Seok Cho)

Abstract

Development of 3kW Hybrid ESS with Function of Emergency Power Supply Authors 양석현(Seok-Hyun Yang) ; 김민재(Min-Jae Kim) ; 최세완(Se-Wan Choi) ; 조준석(Jun-Seok Cho

 This paper proposes a high-efficiency 3-kW hybrid ESS with emergency power supply. The proposed system enables efficient use of power from photovoltaic (PV) cells and energy storage system (ESS). The proposed system can operate as an uninterruptible power supply (UPS) when grid fault occurs, providing seamless transfer from grid-connected mode to stand-alone mode. The LLC converter for PV achieves ZVS turn-on of switches and ZCS turn-off of diodes, and the isolated bidirectional DC-DC converter for ESS achieves ZCS turn-off regardless of load condition, resulting in high efficiency. The efficiency and performance of the proposed hybrid ESS has been verified by a 3-kW prototype.

LINK: http://www.mediafire.com/file/zy858eq2f4qpdzn/Development_of_3kW_Hybrid_ESS_with_Function_of_Eme.pdf/file

Transient Calorimetric Measurement of Ferrite Core Losses Papamanolis, P.; Guillod, T.; Krismer, F.; Kolar, J. W.-Proceedings of the 35th IEEE Applied Power Electronics Conference and Exposition (APEC 2020)

 LINK VIDEO: https://video.ethz.ch/play/presentations_2020/a0300b98-7210-4181-a5b2-2bd6fa4eaaf2.html

Transient Calorimetric Measurement of Ferrite Core Losses Papamanolis, P.; Guillod, T.; Krismer, F.; Kolar, J. W. 21.03.2020 Proceedings of the 35th IEEE Applied Power Electronics Conference and Exposition (APEC 2020)

 Abstract—An accurate and fast transient calorimetric ferrite core-loss measurement method is proposed in this paper. In contrast to electrical measurements, the accuracy of the calorimetric approach is independent of the magnetic excitation and operating frequency. However, an accurate value of the thermal capacitance of the Core Under Test (CUT) is required, which can be achieved, e.g., by measuring the specific heat capacity of the measured core material using a Differential Scanning Calorimeter (DSC) or by using the CUT as a DC electric conductor and measuring its thermal response for known Joule heating. The proposed method is tested experimentally and compared successfully to a state-ofthe- art electrical loss measurement method on MnZn ferrite cores.

LINK  : https://www.pes-publications.ee.ethz.ch/uploads/tx_ethpublications/7_APEC2020_Transient-Calorimetric-Measurement-of-Ferrite-Core-Losses_FINAL_Papamanolis_01.pdf

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