DOCSLIB.ORG

The Topology and Voltage Regulation for High-Power Switched-Capacitor

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text

Load more

The Topology and Voltage Regulation for High-power Switched-capacitor Converters DISSERTATION Presented in Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy in the Graduate School of The Ohio State University By Ke Zou Graduate Program in Electrical and Computer Science The Ohio State University 2012 Dissertation Committee: Jin Wang, Advisor Longya Xu Mahesh S. Illindala Copyright by Ke Zou 2012 Abstract With the rapid advancement of wide band-gap device researches, the switched- capacitor topologies have attracted more and more attentions, due to its inductor-less feature and high-temperature operation capability. This dissertation presents a series of work on high power switched-capacitor converters, including the study on both the topologies and voltage regulation methods for high-power switched-capacitor converters. A modular cell-based switched-capacitor topology is first presented, which can be configured to realize both dc-dc and dc-ac power conversions. When used in dc-dc applications, this topology has the advantages of reduced input current ripple and minimized output capacitor size compared to traditional switched-capacitor topologies. When used in dc-ac conversions, a multi-level inverter topology can be realized based on the proposed cell structure. With a variable-frequency control method, the zero-current- switching is achieved over the entire fundamental cycle. To reduce the power loss, especially the conduction loss on the input capacitors due to the pulsing input current, a voltage tripler that can realize input current and output voltage interleaving is presented. Three identical stages exist in the proposed topology, with a 120 degree phase-shift between each two stages. A two-step charging scheme is utilized to realize the interleaving function. Both the conduction losses and switching losses can be minimized by using this topology. ii To efficiently regulate the output voltage of high-power switched-capacitor converters, a voltage regulation method is proposed, in which a RCL equivalent circuit of the capacitor charging loop is adopted. The third-quadrant operation of MOSFETs is utilized to reduce the power loss due to the voltage regulation. A switched-capacitor dynamic voltage restorer topology is examined as an example of high-power switched-capacitor converter applications. The switched-capacitor based isolation cell, consisting of two capacitors and four switches, is used to isolate the source from the load. The zero-current-switching for the switches related with the capacitor charging is realized, which helps to reduce the EMI noises and switching loss. Detailed theoretical analysis, simulation and experimental results are included in this dissertation. iii Dedication This document is dedicated to my family: My wife, Ms. Yuan Wen; My father, Mr. Houren Zou; And my mother, Mrs. Chunying Wang. iv Acknowledgments I first would like to thank my wife, Ms. Yuan Wen, for her continuous support during my four-year PhD period and helped me to go through many difficulties. Even though we are apart by 3000 miles right now, I can always feel her tremendous love, encouragement and patience on me. Without her support, it would be impossible for me to accomplish what I have done. I am also grateful to my parents for their unconditional love and support. My deepest gratitude also goes to my PhD advisor, Dr. Jin Wang, who has led me into the door of power electronics and consistently providing me guidance when I encounter academics obstacles. His all-around knowledge in both power-electronics and communication skills set a perfect example for me in my future endeavor. I would also like to thank him for offering me the luxury opportunity to let me carry my research freely in the lab, and always encourage me to give me confidence. I also want to thank the professors in OSU, including Dr. Longya Xu, Dr. Donald Kasten, Dr. Vadim Utkin and Dr. Mahesh S. Illindala for serving as my PhD dissertation or qualifying exam committee member and leading many beneficial discussion with me. Special thanks to Dr. Steven Sebo for working with me in my teaching tasks for ECE 747 High Voltage Engineering. I benefited a lot from his knowledge and working attitude. v I would also like to thank all the incredible teammates here in OSU, especially Mr. Mark J. Scott, who worked with me every day and night in the basement of Caldwell Labs, helping me to build many test setups and to educate me about American culture and lifestyle. Many thanks to Mr. Renxiang Wang, who helped me adapted the life in the US quickly when I first came here four years ago. I want to give my thanks to Mr. Cong Li, Mr. Feng Guo, Mr. Chih-lun Wang, Ms. Xiu Yao, Mr. Luis Herrera, Mr. Damoun Ahmadi, Mr. Lixing Fu, Mr. Jinzhu Li, Mr. Ernesto Inoa, Mr. Xuan Zhang, Mr. Chengcheng Yao, Mr. Da Jiao, Mr. Jizhou Jia, Mr. Hanning Tang, Dr. Haiying Xing, Dr. Jingyan Li, Dr. Lei Yang, Mr. Zhendong Zhang, Dr. Jinhua Du, Mr. Kai-Chien Tsai, Dr. Yuan Zhang, Mr. Bo Guan, Mr. Yu Liu and all other fellow students I worked with.. Thank you all for companying me during my happy and difficult days in the past four years. I will not forget all the days I was embraced by your friendship, help and support. vi Vita July 2005 B.S. Information Engineering, Xi`an Jiaotong University July 2008 M.S. Control Science, Xi`an Jiaotong University Sept 2008 to present Ph.D student, The Ohio State University Publications [1] K.Zou, M. J. Scott and J.Wang, “A Switched-capacitor Voltage Tripler with Automatic Interleaving Capability” ,IEEE Tranaction on Power Electronics , vol. 27, No.6, pp. 2857- 2868, 2012. [2] K.Zou, M. J. Scott and J.Wang, “Switched-capacitor Based Voltage Multipliers and Dc/ac Inverters” ,IEEE Transaction on Industrial Application , Accepted, Feb.2012. [3] K. Zou and J. Wang, “Recent Developments on High-Power Switched-Capacitor Converters”, in IEEE Power and Energy Conference at Illinois , pp. 1-5, Feb. 2012. [4] K.Zou, Y. Huang and J.Wang, “A voltage regulation method for high power switched- capacitor circuits”, in IEEE Applied Power Electronics Conference and Exposition (APEC2012) , pp. 1387-1391, Feb. 5-9, 2012. [5] Ke Zou, Mark J. Scott and Jin Wang, “Switched Capacitor Cell Based DC-DC and DC-AC Converters,” in IEEE Applied Power Electronics Conference (APEC2011), Fort Worth, TX,pp.224-230,March, 2011. vii [6] Ke Zou, Mark J. Scott and Jin Wang, “The Analysis of DC-DC Converter Topologies Based on Stackable Voltage Elements,” in 2010 IEEE Energy Conversion Congress and Expo(ECCE2010) , Atlanta, GA, pp.4428-4433, Sept.12-16, 2010. [7] Ke Zou, Stephen Nawrocki, Renxiang Wang and Jin Wang , “High Current Battery Impedance Testing for Power Electronics Circuit Design Optimization,” in IEEE 2009 Vehicle Power and Propulsion Conference (VPPC2009), Dearborn, MI, pp. 531-535, Sept. 7- 10, 2009. [8] Mark J. Scott, Ke Zou, and Jin Wang, “A Gallium-Nitride Switched-Capacitor Circuit Using Synchronous Rectification”, IEEE Transaction on Industrial Application , Accepted, June.2012. [9] Mark J. Scott, Ke Zou, Ernesto Inoa, Ramiro Duarte, Yi Huang and Jin Wang, “A Gallium- Nitride Switched Capacitor Power Inverter for Photovoltaic Applications,” in IEEE Applied Power Electronics Conference and Exposition (APEC2012) , Orlando, FL, 2012. [10] Damoun Ahmadi, Ke Zou, Cong Li, Yi Huang and Jin Wang,, “A Universal Selective Harmonic Elimination Method for High Power Inverters”, IEEE Trans. on Power Electronics, vol.26, no.10,pp 2743-2752, Oct. 2011. [11] Mark J. Scott, Ke Zou, Jin Wang, Chingchi Chen, Ming Su and Lihua Chen, “A gallium- nitride switched-capacitor circuit using synchronous rectification ,” in 2011 IEEE Energy Conversion Congress and Expo (ECCE2011) , Phoenix, AZ, pp.2501-2505, Sept., 2011. [12] Damoun Ahmadi, Ke Zou and Jin Wang, “Weight oriented optimal PWM in low modulation indexes for multilevel inverters with unbalanced DC sources”, in IEEE Applied Power Electronics Conference and Exposition, Palm Spring, CA, pp.1038-1042. , Feb. 2010. [13] Jin Wang, Ke Zou, Chingchi Chen and Lihua Chen, “A High Frequency Battery Model for Current Ripple Analysis,” in IEEE Applied Power Electronics Conference and Exposition(APEC2010), Palm Spring, CA, pp.676-680, Feb. 2010. [14] Jin Wang, Ke Zou and Jeremiah Friend, “Minimum Power Loss Control – Thermoelectric Technology in Power Electronics Cooling,” in IEEE 2009 Energy Conversion Congress and Expo (ECCE2009) , San Jose, CA, pp. 2543 –2548, Sept.2009. viii Fields of Study Major Field: Electrical and Computer Engineering ix Table of Contents Abstract .......................................................................................................................... ii Dedication ..................................................................................................................... iv Acknowledgments ...........................................................................................................v Vita .............................................................................................................................. vii Publications .................................................................................................................. vii Fields of Study .............................................................................................................. ix Table of Contents ............................................................................................................x List of Tables................................................................................................................xvi
Recommended publications
  • Mcnearney, Eugene Master's Thesis

    Mcnearney, Eugene Master's Thesis

    Analysis of Droplet-target interactions in electrostatically charged spraying systems A thesis submitted in partial fulfilment of the requirements for the degree of Master of Engineering, in Electrical and Electronic Engineering at the university of Canterbury by E. J. McNearney, B.E. Hons University of Canterbury, Christchurch, New Zealand December 2020. Abstract Increasing demands for food production and other agricultural products push demands for improved crop yields. Chemical pest management in the form of pesticides is a widely used method of increasing crop yields, over 90% of which is applied as liquid sprays. Poor application efficacy of these pesticides onto the target plant introduce concerns for both the environment and human health for those that come into contact. Traditional spraying techniques result in up to 70% off target losses, with less than 1% of the active chemical reaching the target pest. These losses are highly configuration dependent needing to be selected for the target plant and environmental conditions. One method to improve spray efficacy, electrostatically charging the liquid spray, has been previously introduced to market. This thesis has investigated factors influencing the liquid spray deposition onto the target, looking into plant impedances and using computer vision to quantify depositions with the ESS electrostatic nozzle. A high voltage power supply has also been developed to allow control of nozzle voltage. Leaf to ground impedances of potted grapevines were investigated as well as potential sources for the found values. It was found that the frequency and impedance relationship appears to follow dispersions found in other living tissues. It was also found that physical junctions in the plant where plant fibres intersect provided the largest impedance contributions with apparent linear regions in between.
  • A Real Distribution Network Voltage Regulation Incorporating Auto-Tap-Changer Pole Transformer Multiobjective Optimization

    A Real Distribution Network Voltage Regulation Incorporating Auto-Tap-Changer Pole Transformer Multiobjective Optimization

    applied sciences Article A Real Distribution Network Voltage Regulation Incorporating Auto-Tap-Changer Pole Transformer Multiobjective Optimization Sayed Mir Shah Danish 1,* , Ryuto Shigenobu 2, Mitsunaga Kinjo 1, Paras Mandal 3 , Narayanan Krishna 4, Ashraf Mohamed Hemeida 5 and Tomonobu Senjyu 1 1 Faculty of Engineering, University of the Ryukyus, 1 Senbaru Nishihara-cho, Nakagami, Okinawa 903-0213, Japan 2 Department of Electrical and Electronics Engineering, University of Fukui, 3-9-1 Bunkyo, Fukui-shi, Fukui 910-8507, Japan 3 Department of Electrical and Computer Engineering, University of Texas at El Paso, El Paso, TX 79968, USA 4 Department of Electrical and Electronics Engineering, SASTRA Deemed University, Thanjavur, Tamil Nadu 613401, India 5 Department of Electrical Engineering, Faculty of Energy Engineering, Aswan University, Aswan 81528, Egypt * Correspondence: [email protected] Received: 11 June 2019; Accepted: 11 July 2019; Published: 14 July 2019 Abstract: A number of studies realized operation of power systems are unstable in developing countries due to misconfiguration of distribution systems, limited power transfer capability, inconsistency of renewable resources integration, paucity of control and protection measures, timeworn technologies, and disproportionately topology. This study underlines an Afghanistan case study with 40% power losses that is mainly pertinent from old distribution systems. The long length of distribution systems, low-power transfer capability, insufficient control and protection strategy, peak-demand elimination, and unstable operation (low energy quality and excessive voltage deviations) are perceived pre-eminent challenges of Afghanistan distribution systems. Some attainable solutions that fit challenges are remodeling (network reduction), networks reinforcement, optimum compensation strategy, reconfiguration options, improving, and transfer capability.
  • Voltage Doubler Circuit with 555 Timer

    Voltage Doubler Circuit with 555 Timer

    VOLTAGE DOUBLER CIRCUIT WITH 555 TIMER A Project report submitted in partial fulfilment of the requirements for the degree of B. Tech in Electrical Engineering By ASHFAQUE ARSHAD (11701614014) AKSHAY KUMAR (11701614005) DEBAYAN MANNA (11701614019) SURESH SAHU (11701614056) Under the supervision of MR. SUBHASIS BANERJEE Assistant Professor, Electrical Engineering, RCCIIT Department of Electrical Engineering RCC INSTITUTE OF INFORMATION TECHNOLOGY CANAL SOUTH ROAD, BELIAGHATA, KOLKATA – 700015, WEST BENGAL Maulana Abul Kalam Azad University of Technology (MAKAUT) © 2018 1 ACKNOWLEDGEMENT It is my great fortune that I have got opportunity to carry out this project work under the supervision of (Voltage Doubler Circuit with 555 Timer Circuit under the supervision of Mr. Subhasis Banerjee) in the Department of Electrical Engineering, RCC Institute of Information Technology (RCCIIT), Canal South Road, Beliaghata, Kolkata-700015, affiliated to Maulana Abul Kalam Azad University of Technology (MAKAUT), West Bengal, India. I express my sincere thanks and deepest sense of gratitude to my guide for his constant support, unparalleled guidance and limitless encouragement. I wish to convey my gratitude to Prof. (Dr.) Alok Kole, HOD, Department of Electrical Engineering, RCCIIT and to the authority of RCCIIT for providing all kinds of infrastructural facility towards the research work. I would also like to convey my gratitude to all the faculty members and staffs of the Department of Electrical Engineering, RCCIIT for their whole hearted cooperation
  • Local Voltage Support by Distributed Generation

    Local Voltage Support by Distributed Generation

    Do It Locally: Local Voltage Support by Distributed Generation – A Management Summary Management Summary of IEA Task 14 Subtask 2 – Recommendations Based on Research and Field Experience Report IEA-PVPS T14-08:2017 INTERNATIONAL ENERGY AGENCY PHOTOVOLTAIC POWER SYSTEMS PROGRAMME Do It Locally: Local Voltage Support by Distributed Generation – A Management Summary Management Summary of IEA Task 14 Subtask 2 – Recommendations Based on Research and Field Experience IEA PVPS Task 14, Subtask 2, Activity 2.8 IEA-PVPS T14-08:2017 January 2017 Authors: M. Kraiczy1, [email protected] L. Al Fakhri1, [email protected] T. Stetz2, [email protected] M. Braun1,3, [email protected] 1 Fraunhofer IWES, Germany 2 TH Mittelhessen University of Applied Sciences, Germany 3 University of Kassel, Germany Contents Contents ............................................................................................................................................................ ii Abbreviations and Acronyms ........................................................................................................................... iii Foreword .......................................................................................................................................................... iv Abstract ............................................................................................................................................................ vi 1. Introduction ..............................................................................................................................................
  • Zero-Voltage Switching Flyback-Boost Converter with Voltage-Doubler Rectifier for High Step-Up Applications

    Zero-Voltage Switching Flyback-Boost Converter with Voltage-Doubler Rectifier for High Step-Up Applications

    Zero-Voltage Switching Flyback-Boost Converter with Voltage-Doubler Rectifier for High Step-up Applications Hyun-Wook Seong, Hyoung-Suk Kim, Ki-Bum Park, Gun-Woo Moon, and Myung-Joong Youn Department of Electrical Engineering, KAIST 373-1 Guseong-dong, Yuseong-gu, Daegeon, Republic of Korea, 305-701 [email protected] Abstract -- A zero-voltage switching (ZVS) flyback-boost (FB) output rectifier produces the high voltage spike. Thus, the converter with a voltage-doubler rectifier (VDR) has been snubber network is required across the output rectifier, which proposed. By combining the common part between a flyback results in a degraded efficiency. converter and a boost converter as a parallel-input/series-output As an attractive solution over aforementioned topologies, (PISO) configuration, this proposed circuit can increase a step- up ratio and clamp the surge voltage of switches. The secondary the flyback-boost (FB) converter was proposed as shown in VDR provides a further extended step-up ratio as well as its Fig. 1 [5], [6]. It can achieve a higher step-up ratio due to voltage stress to be clamped. An auxiliary switch instead of a both a transformer and a parallel-input/series-output (PISO) boost diode enables all switches to be turned on under ZVS configuration. Since the voltage spike across the switch is conditions. The zero-current turn-off of the secondary VDR limited to the output voltage of the boost converter, no alleviates its reverse-recovery losses. The operation principles, protection circuit is required. Furthermore, since the energy the theoretical analysis, and the design consideration are investigated.
  • DESIGN and SIMULATION of a HIGH PERFORMANCE CMOS VOLTAGE DOUBLERS USING CHARGE REUSE TECHNIQUE 1. Introduction

    DESIGN and SIMULATION of a HIGH PERFORMANCE CMOS VOLTAGE DOUBLERS USING CHARGE REUSE TECHNIQUE 1. Introduction

    Journal of Engineering Science and Technology Vol. 12, No. 12 (2017) 3344 - 3357 © School of Engineering, Taylor’s University DESIGN AND SIMULATION OF A HIGH PERFORMANCE CMOS VOLTAGE DOUBLERS USING CHARGE REUSE TECHNIQUE SHAMIL H. HUSSEIN Dept. of Electrical Engineering, College of Engineering, University of Mosul, Mosul, Iraq E-mail: [email protected] Abstract Voltage doubler (VD) structure plays an important role in charge pump (CP) circuits. It provides a voltages that is higher than the voltage of the power supply or a voltage of reverse polarity. In many applications such as the power IC and switched-capacitor transformers. This paper presents the design and analysis for VD using charge reuse technique CMOS 0.35µm tech. with high performance. Bootstrapped and charge reuse techniques is used to improve performance of integrated VD. Charge reusing method is based on equalizing the voltages of the pumping capacitances in each stage of CP. As a consequence, it reduces the load independent losses, improve the efficiency. Simulation using Orcad is applied for various VD structures shows improvement in charge reuse technique compared with existing counterpart. The results obtained show that the VD can be used in a wide band frequencies (0-100 MHz) or greater. The charge reuse VD circuit provided a good efficiency about (87.6%) and (83.5%) for one stage and two stage respectively at pump capacitance of 57pf, load current of 1mA, frequency of 10 MHz and supply voltage is 3.5 V compared with one stage and two stage of a latched VD are (85.4%) and (80%) respectively.
  • HIGH VOLTAGE DC up to 2 KV from AC by USING CAPACITORS and DIODES in LADDER NETWORK Mr

    HIGH VOLTAGE DC up to 2 KV from AC by USING CAPACITORS and DIODES in LADDER NETWORK Mr

    [Prasad * et al., 5(6): June, 2018] ISSN: 2349-5197 Impact Factor: 3.765 INTERNATIONAL JOURNAL OF RESEARCH SCIENCE & MANAGEMENT HIGH VOLTAGE DC UP TO 2 KV FROM AC BY USING CAPACITORS AND DIODES IN LADDER NETWORK Mr. A. Raghavendra Prasad, Mr.K.Rajasekhara Reddy & Mr.M.Siva sankar Asst. Prof., Santhiram Engineering college, Nandyal Asst. Prof., Santhiram Engineering college, Nandyal Asst. Prof., Santhiram Engineering college, Nandyal DOI: 10.5281/zenodo.1291902 Abstract The aim of this project is designed to develop a high voltage DC around 2KV from a supply source of 230V AC using the capacitors and diodes in a ladder network based on voltage multiplier concept. The method for stepping up the voltage is commonly done by a step-up transformer. The output of the secondary of the step up transformer increases the voltage and decreases the current. The other method for stepping up the voltage is a voltage multiplier but from AC to DC. Voltage multipliers are primarily used to develop high voltages where low current is required. This project describes the concept to develop high voltage DC (even till 10KV output and beyond) from a single phase AC. For safety reasons our project restricts the multiplication factor to 8 such that the output would be within 2KV. This concept of generation is used in electronic appliances like the CRT’s, TV Picture tubes, oscilloscope and also used in industrial applications. The design of the circuit involves voltage multiplier, whose principle is to go on doubling the voltage for each stage. Thus, the output from an 8 stage voltage multiplier can generate up to 2KV.
  • A Review of Charge Pump Topologies for the Power Management of Iot Nodes

    A Review of Charge Pump Topologies for the Power Management of Iot Nodes

    electronics Review A Review of Charge Pump Topologies for the Power Management of IoT Nodes Andrea Ballo , Alfio Dario Grasso * and Gaetano Palumbo Dipartimento di Ingegneria Elettrica Elettronica e Informatica (DIEEI), University of Catania, I-95125 Catania, Italy; [email protected] (A.B.); [email protected] (G.P.) * Correspondence: [email protected]; Tel.: +39-095-738-2317 Received: 11 April 2019; Accepted: 24 April 2019; Published: 29 April 2019 Abstract: With the aim of providing designer guidelines for choosing the most suitable solution, according to the given design specifications, in this paper a review of charge pump (CP) topologies for the power management of Internet of Things (IoT) nodes is presented. Power management of IoT nodes represents a challenging task, especially when the output of the energy harvester is in the order of few hundreds of millivolts. In these applications, the power management section can be profitably implemented, exploiting CPs. Indeed, presently, many different CP topologies have been presented in literature. Finally, a data-driven comparison is also provided, allowing for quantitative insight into the state-of-the-art of integrated CPs. Keywords: charge pump (CP); Dickson charge pump; energy harvesting; IoT node; power management; switched-capacitors boost converter 1. Introduction The Internet of Things (IoT) paradigm is expected to have a pervasive impact in the next years. The ubiquitous character of IoT nodes implies that they must be untethered and energy autonomous. In IoT nodes, power-autonomy is achieved by scavenging energy from the ambient using transducers, such as photovoltaic (PV) cells, thermoelectric generators (TEG), and vibration sensors [1–4].
  • US5357419.Pdf

    US5357419.Pdf

    ||||||||||||||| USOO5357419A United States Patent 19 11 Patent Number: 5,357,419 Limpaecher 45 Date of Patent: Oct. 18, 1994 (54) COMPACT AND EFFICIENT -Pressure Glow-Discharge Lasers', University of Na TRANSFORMERLESS POWER tal, Dec. 1980, Ph.D. Thesis, pp. 90-99, 176-178. CONVERSION SYSTEM Skeist et al., “Recent Advances in High Power, High 75 Inventor: Rudolf Limpaecher, Topsfield, Mass. Voltage Technology', The Power Sources Conference, Dec. 1984. 73) Assignee: D.C. Transformation Inc., Rowley, Malesani et al., “Active Power Filter with Hybrid En Mass. ergy Storage", IEEE, vol. 6, No. 3, Jul. 1991, pp. (21) Appl. No.: 121,693 392-397. 22 Filed: Sep. 15, 1993 Bellar et al., “Analysis of the Dynamic and Steady-S- tate Performance of Cockcroft-Walton Cascade Recti Related U.S. Application Data fiers", IEEE, vol. 7, No. 3, Jul. 1992, pp. 526-534. Joos et al., “Performance Analysis of a PWM Inverter 63 Continuation of Ser. No. 864,031, Apr. 6, 1992, Pat. VAR Compensator", IEEE, vol. 6, No. 3, Jul. 1991, pp. No. 5,270,913. 380-391. 51) Int. Cl. ........................ H02M 3/07; HO2M 7/04 Klaassens et al., "Three-Phase AC-to-AC 52 U.S. Cl. ...................................... 363/140; 363/60; Series-Resonant Power Converter with a Reduced 363/62; 307/109; 307/110 Number of Thyristors' IEEE, vol. 6, No. 3, Jul. 1991, 58 Field of Search .................... 307/109, 110; 320/1; pp. 346-355. 363/59, 60, 61, 62, 63, 140 Wernekinck et al., “A High Frequency AC/DC Con 56) References Cited verter with Unity Power Factor and Minimum Har monic Distortion”, IEEE, vol.
  • Comparison of Voltage Regulation Between SST and Conventional Transformers in High Penetration PV Power Systems

    Comparison of Voltage Regulation Between SST and Conventional Transformers in High Penetration PV Power Systems

    Scholars' Mine Masters Theses Student Theses and Dissertations Summer 2017 Comparison of voltage regulation between SST and conventional transformers in high penetration PV power systems Gautham Ashokkumar Follow this and additional works at: https://scholarsmine.mst.edu/masters_theses Part of the Electrical and Computer Engineering Commons Department: Recommended Citation Ashokkumar, Gautham, "Comparison of voltage regulation between SST and conventional transformers in high penetration PV power systems" (2017). Masters Theses. 7680. https://scholarsmine.mst.edu/masters_theses/7680 This thesis is brought to you by Scholars' Mine, a service of the Missouri S&T Library and Learning Resources. This work is protected by U. S. Copyright Law. Unauthorized use including reproduction for redistribution requires the permission of the copyright holder. For more information, please contact [email protected]. COMPARISON OF VOLTAGE REGULATION BETWEEN SST AND CONVENTIONAL TRANSFORMERS IN HIGH PENETRATION PV POWER SYSTEMS by GAUTHAM ASHOKKUMAR A THESIS Presented to the Faculty of the Graduate School of the MISSOURI UNIVERSITY OF SCIENCE AND TECHNOLOGY In Partial Fulfillment of the Requirements for the Degree MASTER OF SCIENCE IN ELECTRICAL ENGINEERING 2017 Approved by Dr. Mariesa L. Crow, Advisor Dr. Mehdi Ferdowsi Dr. Pourya Shamsi iii ABSTRACT Solid state transformers (SST) are power electronic transformers combined with high-frequency conventional transformers and control circuitry capable of delivering high performance and flexible power control capabilities. This thesis focuses on analyzing the performance of SSTs in a distribution system with photovoltaic (PV) injection. In order to validate the performance of SSTs, average value models are used on the IEEE 34 bus distribution feeder network scaled to 12.47 kV.
  • Fundamentals of Reactive Power and Voltage Regulation in Power Systems

    Fundamentals of Reactive Power and Voltage Regulation in Power Systems

    Fundamentals of Reactive Power and Voltage Regulation in Power Systems Course No: E03-011 Credit: 3 PDH Boris Shvartsberg, Ph.D., P.E., P.M.P. Continuing Education and Development, Inc. 22 Stonewall Court Woodcliff Lake, NJ 07677 P: (877) 322-5800 [email protected] FUNDAMENTALS OF REACTIVE POWER AND VOLTAGE REGULATION IN POWER SYSTEMS Boris Shvartsberg, Ph.D., P.E., P.M.P. © 2011 Boris Shvartsberg Introduction One of the main goals that every electrical utility company has is transportation of electrical energy from generating station to the customer, meeting the following main criteria: • High reliability of power supply • Low energy cost • High quality of energy (required voltage level, frequency etc.) This course is concentrated on accomplishing the 2nd and 3rd goals through regulation of reactive power and voltage. Reliability of power supply is a subject of a different course. To better understand why the regulation of reactive power and voltage makes power systems more efficient, let’s start with discussion about the structure of the power systems and their main components. Power System Structure The typical power system structure is shown in Figure 1. Fig. 1 - Power System Structure and Main Components Where the numerical symbols represent the following components: (1) Generator (2) Generating station’s step-up transformer substation (3) Extra high voltage step-down transformer substation (4) High voltage step-down transformer substation (5) Distribution substation (6) Distribution Transformer (7) Transmission and Distribution
  • Secondary Voltage Regulation Based on Average Voltage Control

    Secondary Voltage Regulation Based on Average Voltage Control

    TecnoLógicas ISSN: 0123-7799 ISSN: 2256-5337 [email protected] Instituto Tecnológico Metropolitano Colombia Secondary voltage regulation based on average voltage control Lopera-Mazo, Edwin H.; Espinosa, Jairo Secondary voltage regulation based on average voltage control TecnoLógicas, vol. 21, no. 42, 2018 Instituto Tecnológico Metropolitano, Colombia Available in: https://www.redalyc.org/articulo.oa?id=344255453005 DOI: https://doi.org/10.22430/22565337.779 Los artículos publicados por la revista TecnoLógicas son obras literarias y científicas protegidas por las leyes de Derecho de Autor. Con la firma de la Declaración de Originalidad, así como con la entrega de la obra para su consideración o posible publicación, los autor autorizan de forma gratuita, al INSTITUTO TECNOLÓGICO METROPOLITANO –ITM- para la publicación, reproducción, comunicación, distribución y transformación de la obra e igualmente declaran bajo la gravedad del juramento que la obra es original e inédita de exclusiva autoría de los remitentes. This work is licensed under Creative Commons Attribution 3.0 International. PDF generated from XML JATS4R by Redalyc Project academic non-profit, developed under the open access initiative Edwin H. Lopera-Mazo, et al. Secondary voltage regulation based on average voltage control Artículos de investigación Secondary voltage regulation based on average voltage control Regulación secundaria de voltaje basada en el control del voltaje promedio Edwin H. Lopera-Mazo DOI: https://doi.org/10.22430/22565337.779 Instituto Tecnológico Metropolitano, Colombia Redalyc: https://www.redalyc.org/articulo.oa? [email protected] id=344255453005 Jairo Espinosa Universidad Nacional de Colombia, Colombia [email protected] Received: 05 February 2018 Accepted: 20 April 2018 Abstract: is paper compares a conventional Secondary Voltage Regulation (SVR) scheme based on pilot nodes with a proposed SVR that takes into account average voltages of control zones.