Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
The Transactions of the Korean Institute of Power Electronics
Journal Basic Information
Journal DOI :
The Korean Institute of Power Electronics
Editor in Chief :
Volume & Issues
Volume 16, Issue 6 - Dec 2011
Volume 16, Issue 5 - Oct 2011
Volume 16, Issue 4 - Aug 2011
Volume 16, Issue 3 - Jun 2011
Volume 16, Issue 2 - Apr 2011
Volume 16, Issue 1 - Feb 2011
Selecting the target year
Jeju 80kV HVDC Controller Modeling Using PSCAD/EMTDC Program
Choi, Soon-Ho ; Lee, Seong-Doo ; Kim, Chan-Ki ;
The Transactions of the Korean Institute of Power Electronics, volume 16, issue 6, 2011, Pages 533~541
DOI : 10.6113/TKPE.2011.16.6.533
This paper studies modeling of Jeju 80kV HVDC system and its controller by using PSCAD/EMTDC program. Reduced ac network is applied to verify interaction between ac network and dc system. Design parameter is applied to the converter transformer, harmonic filter and dc transmisstion line to simulate dc system. HVDC controller is divided into a rectifier controller and a inverter controller according to the converter operating mode. The inverter controller is composed of current control, voltage control and extingtion angle control. The rectifier controller is composed of current control and voltage control. Both controller has VDCOL characteristics so that current order is dependant on voltage variation. Step response, ac network single phase fault, three phase fault is simulated to verify the dynamic performance of controller model in both transient state and steady state.
A New Concept of Magnetic Cable for Safe Mobile Power Delivery
Lee, Woo-Young ; Huh, Jin ; Choi, Su-Yong ; Rim, Chun-Taek ;
The Transactions of the Korean Institute of Power Electronics, volume 16, issue 6, 2011, Pages 542~553
DOI : 10.6113/TKPE.2011.16.6.542
A magnetic cable that can safely deliver high frequency AC electric power in flammable or sensitive workplaces by preventing from arcs and electric shocks is firstly proposed in this paper. Several new magnetic cable structures with magnetic shields, which are composed of such cancel coil, cancel copper plate, and cancel copper pipe, were compactly implemented by considering and analyzing fringe field and thus the parallel leakage flux is drastically reduced. The output power and efficiency of a prototype magnetic cable with 1.5 m length and 5 cm gap were measured as 353.8W and 68%, where the source current and switching frequency were 10
and 20 kHz, respectively. The proposed magnetic cables are fully analyzed and verified by finite-element method (FEM) simulations and experiments. The results are in a good agreement.
Inverter for Induction Heating using Simultaneous Dual-Frequency Method
Shin, Woo-Seok ; Park, Hee-Chang ;
The Transactions of the Korean Institute of Power Electronics, volume 16, issue 6, 2011, Pages 554~560
DOI : 10.6113/TKPE.2011.16.6.554
Single-frequency induction heating equipment caused by a hardening heat treatment process of the double investment in the issue and allow the heat treatment process in order to shorten the time from one process to work simultaneously on two kinds of processes that allow Simultaneous Dual Frequency(SDF) drive scheme technology are described. In this paper, we propose a dual way to drive a simultaneous dual-frequency drive scheme has been implemented. Through simulations and experiments, we can obtain the validity of the proposed inverter for dual-frequency control and power control.
Operation Characteristic of Single-phase PFC converter with 1-switch Voltage Doubler Strategy
Ku, Dae-Kwan ; Ji, Jun-Keun ; Cha, Guee-Soo ; Lim, Seung-Beom ; Hong, Soon-Chan ;
The Transactions of the Korean Institute of Power Electronics, volume 16, issue 6, 2011, Pages 561~568
DOI : 10.6113/TKPE.2011.16.6.561
This paper describes the operation characteristic of a single-phase PFC converter with 1-switch voltage doubler strategy for single-phase double-conversion UPS. A single-phase PFC converter with 1-switch voltage doubler strategy needs a diode bridge and one bidirectional active switch. Thus it is possible to reduce the material cost. However, the study results of operation characteristic and controller design has not been known after the converter circuit was proposed. For the performance evaluation of PFC converter, single-phase 3kVA double-conversion UPS was tested. The performance of PFC converter is experimentally confirmed with followings - input current reference traking, input power factor correction.
Dead Time Compensation of Grid-connected Inverter Using Resonant Controller
Han, Sang-Hyup ; Park, Jong-Hyoung ; Kim, Heung-Geun ; Cha, Honn-Yong ; Chun, Tea-Won ; Nho, Eui-Cheol ;
The Transactions of the Korean Institute of Power Electronics, volume 16, issue 6, 2011, Pages 569~576
DOI : 10.6113/TKPE.2011.16.6.569
This paper proposes a new dead time compensation method for a PWM inverter. Recently, PWM inverters are extensively used for industry applications, such as ac motor drives, distributed grid-connected systems and a static synchronous compensator (STATCOM). Nonlinear characteristics of the switch and the inverter dead time cause a current distortion and deterioration of power quality. The dominant harmonics in the output current are the
harmonics in the stationary frame, and the
harmonics in the synchronous rotating frame. In this paper, a resonant controller which compensates the
harmonics in the synchronous rotating frame is proposed. This method does not require any off-line experimental measurements, additional hardware and complicated mathematical computations. Furthermore, the proposed method is easy to implement and does not cause any stability problem.
Development of Hardware Simulator for Operation Analysis of DC Microgrid
Lee, Ji-Heon ; Kim, Won-Yong ; Kim, Jong-Won ; Han, Byung-Moon ;
The Transactions of the Korean Institute of Power Electronics, volume 16, issue 6, 2011, Pages 577~586
DOI : 10.6113/TKPE.2011.16.6.577
This paper describes the development of hardware simulator for the operation analysis of DC microgrid. The hardware simulator consists of several distributed power sources such as a wind power generation, solar power and fuel cell, and two energy storages such as a supercapacitor and battery. The main controller which performs a role of energy management and state monitoring is connected with the local controller in each power source and storage through ethernet-based communication link. The developed hardware simulator can be utilized to analyze the performance DC microgrid with practical manner.
High Power Density and Low Cost Photovoltaic Power Conditioning System with Energy Storage System
Keum, Moon-Hwan ; Jang, Du-Hee ; Hong, Sung-Soo ; Han, Sang-Kyoo ; SaKong, Suk-Chin ;
The Transactions of the Korean Institute of Power Electronics, volume 16, issue 6, 2011, Pages 587~593
DOI : 10.6113/TKPE.2011.16.6.587
A new high power density and low cost Photovoltaic Power Conditioning System (PV PCS) with energy storage system is proposed. Its high power density and cost effectiveness can be achieved through the unification of the maximum power point tracker and battery charger/discharger. Despite of the reduced power stage, the proposed system can achieve the same performances of maximum power point tracking and battery charging/discharging as the conventional system. Moreover, the high voltage stress across the link-capacitor can be relieved through the series-connected link-capacitor with the battery. Therefore, a large number of series/parallel-connected link-capacitors can be reduced by 4-times. Especially, when the utility power failure happens, both photovoltaic and battery energies can be supplied to the load with only one power stage. Therefore, it features a simpler structure, less mass, lower cost, and fewer devices. Finally, to confirm the operation, validity, and features of the proposed system, theoretical analysis and experimental results from a single phase AC 220Vrms/1.5kW prototype are presented.
A Current Controller with the Compensation of the Input Voltage Unbalance and Distortion for Three Phase PWM Rectifier
Shin, Hee-Keun ; Kim, Hag-Wone ; Cho, Kwan-Yuhl ; Lim, Byung-Kuk ;
The Transactions of the Korean Institute of Power Electronics, volume 16, issue 6, 2011, Pages 594~601
DOI : 10.6113/TKPE.2011.16.6.594
In this paper, a new current controller with the compensation of an unbalance and distorted grid voltages has been proposed. Generally, in the three-phase power system, single phase or nonlinear loads can be connected with the 3 phase linear load simultaneously on the same point of common coupling. Therefore, The source voltage unbalance and distortion problem can be occurred. Under these unbalance and distorted grid voltage conditions, the input current of 3 phase PWM rectifiers also have unbalance and distortion. In this paper, a current controller with the simple Model Reference Adaptive System based unbalance and distorted voltages observer is proposed to get a sinusoidal input current. The performance of the proposed algorithm is verified through the simulation and the experiment.
Simple Initial Rotor Position Estimation for Stable Startup of IPMSM Sensorless Control
Kim, Gun-Myoung ; Park, Byoung-Gun ; Goo, Bon-Gwan ; Kim, Rae-Young ; Hyun, Dong-Seok ;
The Transactions of the Korean Institute of Power Electronics, volume 16, issue 6, 2011, Pages 602~609
DOI : 10.6113/TKPE.2011.16.6.602
This paper proposes a simple initial rotor position estimation method to obtain a stable startup performance for back EMF-based sensorless control. The proposed estimation method is achieved at standstill by using the current response to difference between each of the stator winding inductance. This initial rotor position estimation method can be easily implemented to control algorithm without any other external devices. The proposed algorithm is also not affected by motor parameter. The validity of the proposed method is demonstrated by experimental result.
Dead Time Compensation Algorithm for the 3-Phase Inverter using SVPWM
Kim, Hong-Min ; Choo, Young-Bae ; Lee, Dong-Hee ;
The Transactions of the Korean Institute of Power Electronics, volume 16, issue 6, 2011, Pages 610~617
DOI : 10.6113/TKPE.2011.16.6.610
This paper proposes a novel and direct dead-time compensation method of the 3-phase inverter using space vector pulse width modulation(SVPWM) topology. The proposed dead-time compensation method directly compensates the dead-time to the turn-on time of the effective voltage vector according to the current direction of the medium voltage reference. Each phase voltages are determined by the switching times of the effective voltage vectors, and the practical switching times have loss according to the current direction by the dead-time effect in the 3-phase inverter. The proposed method adds the dead-time to the switching time of the effective voltage vector according to the current direction, so it does not require complex d-q transform and controller to compensate the voltage error. The proposed dead-time compensation scheme is verified by the computer simulation and experiments of 3-phase R-L load.
Two Stage DC/DC Converter for Photovoltaic Generation
Yoon, Kwang-Ho ; Phum, Sopheak ; Kim, Eun-Soo ; Won, Jong-Seob ; Oh, Sung-Jin ;
The Transactions of the Korean Institute of Power Electronics, volume 16, issue 6, 2011, Pages 618~626
DOI : 10.6113/TKPE.2011.16.6.618
Solar cell is one of the most important new renewable energy for future energy generation. This paper presents a novel two stage DC/DC converter topology for PV PCSs. The proposed converter consists of an interleaved boost converter and a two-tank LLC resonant converter which is connected in parallel in primary and series in secondary. The main idea of this topology is that the system can achieve either unilateral or bilateral operations due to the input voltage level of the PV module, which leads to a better performance. The operating schemes on the proposed converter are analyzed and described. A 2.2kW prototype product is built, tested and verified.
LLC Resonant Converter Using A Novel Planar Transformer
Lee, Seung-Min ; Noh, Young-Jae ; Kang, Cheol-Ha ; Jang, Sang-Ho ; Kim, Eun-Soo ; Chung, Bong-Gun ;
The Transactions of the Korean Institute of Power Electronics, volume 16, issue 6, 2011, Pages 627~637
DOI : 10.6113/TKPE.2011.16.6.627
To cope with the high power density and low cost in switching power supply, this paper presents a novel planar transformer, which can regulate the leakage inductance of planar transformer used for LLC resonant converter. Modeling and analysis of a novel planar transformer are discussed in detail and a prototype 200W LLC resonant converter is tested to verify.