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检索条件"机构=Power Electronics and System Control Lab"

共 19 条记录，以下是11-20 订阅

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power Loss Analysis of Full-Bridge LLC Resonant Converter

Power Loss Analysis of Full-Bridge LLC Resonant Converter

引用

International Conference on Electrical Machines and systems (ICEMS)

作者： So-Yeon Choi Rae-Young Kim Energy Power Electronics Control System Lab Hanyang University Seoul South Korea

In this paper, a method of modeling the power loss of a full-bridge LLC resonant converter using the TDA (Time-Domain Analysis) method is proposed. Loss analysis based on TDA has higher accuracy than that of conventional FHA-based analysis. The proposed method shows the loss of a converter whose initial value is theoretically calculated for TDA analysis for a Full-Bridge LLC resonant converter. Also, compare the simulation value with the proposed method based on the prototype of the 10kw LLC resonant converter.

关键词： Analytical models Prototypes Resonant converters Mathematical models Time-domain analysis

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Hierarchical Structure-based Ramp rate control of Renewable Energy Sources for Hub-Station

Hierarchical Structure-based Ramp rate Control of Renewable ...

引用

International Conference on Electrical Machines and systems (ICEMS)

作者： Su-Seong Park Jae-Suk Lee Dong-Hwan Park Rae-Young Kim Energy Power Electronics Control System Lab Hanyang University Seoul South Korea

A hierarchical structure-based ramp rate control using MPC (Model Predictive control) to mitigate fluctuation of renewable energy sources and control HESS (Hybrid Energy Storage system) for Hub-station is proposed. As a key factor in the next-generation power grid systems, the structure and components of the hub station are proposed. Not only operating the hub-station stably but also increase the penetration rate of renewable energy sources, the hierarchical structure-based ramp rate control is necessary. It consists of an upper and lower-level control strategy. In the upper-level control strategy, the ramp rate control and frequency decomposition are conducted. And in the lower-level control strategy, Using the MPC technique, both SOC and power reference of the battery can be controlled. Fast and high-frequency output fluctuation components can be handled by the supercapacitor control strategy, and it supplements the power deviation from the battery control strategy as an auxiliary device. Through the proposed technique, the output fluctuation of the renewable energy source can be controlled within the limit value, and at the same time, the charge, discharge power, and SOC value of the HESS can be controlled within the specified range.

关键词： Renewable energy sources Fluctuations Supercapacitors power grids Batteries State of charge Frequency control

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Spherical Flux Concentration Transmitter for Omnidirectional Wireless power Transfer with Improved power Transmission Distance

Spherical Flux Concentration Transmitter for Omnidirectional...

引用

International Future Energy electronics Conference (IFEEC)

作者： Kwang Rock Park Hwa Rang Cha Rae Young Kim Energy & power Electronics Control System Lab Hanyang University Seoul Korea

ISBN: (数字)9781728131535

ISBN: (纸本)9781728131542

In this paper, we propose a spherical flux concentration structure for omnidirectional wireless power transfer. Omnidirectional wireless power transfer technology is a method that can transmit power to a transmitter located in arbitrary position in a two-dimensional or three-dimensional space. However, in order to improve power transfer distance in wireless power transfer system, the diameter of the coil or the number of windings must increase, thereby increasing the size of the transmitter. The transmitter structure proposed in this paper adds a ferrite core inside the transmitter coil so that the magnetic flux generated by the transmitter is directed in the position of the receiver. As a result, the flux linkage increases and the mutual inductance increases. By implementing the omnidirectional wireless power transfer system using the proposed structure, the power transfer distance can be improved by 65% compared to the existing system without increasing the size of the transmitter. Simulation shows that the proposed spherical flux concentration structure increases the mutual inductance when applied to omnidirectional wireless power transmission system.

关键词： Transmitters Wireless power transfer Inductance Magnetic fields Receivers Magnetic flux density Windings

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power decoupling method comparison of isolated single-phase matrix converters using center-tapped transformer with PDM 7

Power decoupling method comparison of isolated single-phase ...

引用

7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015

作者： Takaoka, Nagisa Takahashi, Hiroki Itoh, Jun-Ichi Chiang, Goh Teck Sugiyama, Takahide Sugai, Masaru Dept. of Electrical Engineering Nagaoka University of Technology Japan Dept. of Science of Technology Innovation Nagaoka University of Technology Nagaoka Niigata Japan Dept. of System and Electronics Engineering Dept. II Power Electronics and Control Lab. Toyota Central RandD Labs. INC. Japan

ISBN: (纸本)9781467371506

This paper presents an isolated type of single-phase matrix converter topology for PHV/EV on-board battery chargers. The proposed converter is comprised of a full bridge inverter, a high frequency transformer and a matrix converter. Due to the lack of DC link bus in matrix converter, in order to suppress the power fluctuation, a power decoupling method which only employs a center-tapped high frequency transformer and a small LC buffer where requires no additional switches is applied. On the other hand, the matrix converter applies PDM (Pulse Density Modulation) which achieve ZVS (zero voltage switching) in order to generate a 50Hz/60Hz sinusoidal waveform at the grid side. As a result, this converter shows promising features small size and high efficiency. In this paper, by harmonic analysis, the effectiveness of power decoupling method is evaluated in two cases: the PDM based on the PWM as a conventional method and the PDM based on the delta-sigma conversion. In the experimental results, the power decoupling method with the PDM based on the delta-sigma conversion reduces the DC bus current ripple by 84.8% comparing to the case where the power decoupling method is not applied, while the output voltage distortion is reduced by 64.1% compared with that of the PDM based on the PWM is applied. © 2015 IEEE.

关键词： Matrix converters

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Virtual flux based direct power control for three-level PWM rectifier 17

Virtual flux based direct power control for three-level PWM ...

引用

2014 17th International Conference on Electrical Machines and systems, ICEMS 2014

作者： Yingchao, Zhang Liping, Jin Yongchang, Zhang Ting, Lu Zhengming, Zhao Key Lab. of Special Power Supply of PLA Chongqing Communication Institute China North China University of Technology Power Electronics and Motor Drive Engineering Research Center China State Key Lab. of Control and Simulation of Power System and Generation Equipments Tsinghua University China

ISBN: (纸本)9781479951611

This paper presents a new control strategy for three-level neutral point clamped (NPC) pulse width modulated (PWM) rectifier without power source voltage sensors. The relationship between instantaneous power and voltage vectors is derived mathematically. Virtual flux is estimated and used to calculate the phase of the power source voltage and instantaneous power. On these bases, a direct power control (DPC) scheme for three-level PWM rectifier is presented. An optimal switching table is established, vector switching scheme and balance strategy for the neutral point potential are discussed. Variable switching frequency and dynamic process of the startup are also analyzed. Experimental results have verified the theoretical approach and the three-level PWM rectifier with proposed DPC based on virtual flux exhibits several advantages, such as simple algorithm, low costs and excellent dynamic performance. © 2014 IEEE.

关键词： Electric rectifiers

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Neutral point voltage balancing method and the influence of some parameters on capacitor voltage in three-level NPC converter

引用

International Conference on Advanced Engineering Theory and Applications 2013, AETA 2013

作者： Nam, Vo Xuan Giau, Le Van Manh Nho, Nguyen Van Trang, Tran Thanh Electronics Engineering Department Cao Thang College of Technology Ho Chi Minh City Viet Nam National Key Lab. of Digital Control and System Engineering University of Technology Vietnam National University Ho Chi Minh City Viet Nam Power Engineering Research Lab. University of Technology Vietnam National University Ho Chi Minh City Viet Nam Electrical Engineering Department Ho Chi Minh City Open University Viet Nam Electronics and Telecommunication Engineering Department Van Hien University Ho Chi Minh City Viet Nam

ISBN: (纸本)9783642419676

This paper presented a control method for balancing capacitor voltage of three-level neutral-point-diode-clamped (NPC) converter. This control method overcomes one of the main problems of this converter, which is the low frequency voltage oscillation that appears in the neutral point. The algorithm is based on Carrier-based Pulse Width Modulation (CPWM). This paper showed the influence of power factor, modulation index and offset limit on capacitor voltage. It also presented the optimal amplitude of offset voltage in some case of power factors and modulation indexes. © Springer-Verlag Berlin Heidelberg 2014.

关键词： Modulation

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Improved pitch angle control for variable-speed wind turbine system

引用

International Conference on Advanced Engineering Theory and Applications 2013, AETA 2013

作者： Van, Tan Luong Nguyen, Buu Pham Nhat Tan Truong, Trung Hieu Trang, Tran Thanh Department of Electrical Engineering Ho Chi Minh City Electric Power College 554 Ha Huy Giap District 12 Ho Chi Minh City Viet Nam Department of Power System Ho Chi Minh City Electric Power College 554 Ha Huy Giap District 12 Ho Chi Minh City Viet Nam Department of Electrical-Mechanical Engineering Ho Chi Minh City Electric Power College 554 Ha Huy Giap District 12 Ho Chi Minh City Viet Nam Department of Electronics and Telecommunication Engineering Van Hien University 665-667-669 Dien Bien Phu District 3 Ho Chi Minh City Viet Nam National Key Lab. of Digital Control and System Engineering University of Technology Vietnam National University Ho Chi Minh City 268 Ly Thuong Kiet District 10 Ho Chi Minh City Viet Nam

ISBN: (纸本)9783642419676

In this paper, a pitch angle control scheme based on the fuzzy logic is proposed for the variable-speed wind turbine systems. The generator output power and rotor speed are used as control input variables for the fuzzy logic controller (FLC), which are effective to compensate for the nonlinear characteristic of the pitch angle to the wind speed. Also, a speed sensorless technique estimating the rotational speed is employed for the proposed control method. The effectiveness of the proposed method is verified by MATlab simulation results for a 2-MW PMSG wind turbine system. © Springer-Verlag Berlin Heidelberg 2014.

关键词： Fuzzy logic

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Nonlinear control of PMSG wind turbine systems

引用

International Conference on Advanced Engineering Theory and Applications 2013, AETA 2013

作者： Van, Tan Luong Truong, Trung Hieu Nguyen, Buu Pham Nhat Tan Trang, Tran Thanh Department of Basics Ho Chi Minh City Electric Power College 554 Ha Huy Giap District 12 Ho Chi Minh City Viet Nam Department of Electrical-Mechanical Engineering Ho Chi Minh City Electric Power College 554 Ha Huy Giap District 12 Ho Chi Minh City Viet Nam Department of Power System Ho Chi Minh City Electric Power College 554 Ha Huy Giap District 12 Ho Chi Minh City Viet Nam Department of Electronics and Telecommunication Engineering Van Hien University 665-667-669 Dien Bien Phu District 3 Ho Chi Minh City Viet Nam National Key Lab. of Digital Control and System Engineering University of Technology Vietnam National University Ho Chi Minh City 268 Ly Thuong Kiet District 10 Ho Chi Minh City Viet Nam

ISBN: (纸本)9783642419676

This paper proposes a control scheme for the permanent magnet synchronous generator (PMSG) wind power system. The DC-link voltage can be controlled at the machine-side converter (MSC), while the grid-side converter (GSC) controls the grid active power for a maximum power point tracking (MPPT). At the grid fault condition, the DC-link voltage controller is designed using a feedback linearization (FL) theory. For the MPPT, it is also developed for the PMSG wind turbines to continuously generate the maximum electrical power without any sensor. The validity of this control algorithm has been verified by simulation 2-MW PMSG wind turbine system. © Springer-Verlag Berlin Heidelberg 2014.

关键词： Feedback linearization

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Short-Circuit Tests on SiC power MOSFETs

Short-Circuit Tests on SiC Power MOSFETs

引用

IEEE International Conference on power electronics and Drive systems

作者： Alberto Castellazzi Tsuyoshi Funaki Tsunenobu Kimoto Takashi Hikihara Power Electronics Machines and Control Group University of Nottingham Nottingham UK Power Systems Lab Osaka University Osaka Japan Semiconductor Science and Engineering Lab Kyoto University Kyoto Japan Power Conversion and System Control Engineering Lab Kyoto University Kyoto Japan

ISBN: (纸本)9781467317900

This paper presents experimental results and a related discussion for the behavior under short-circuit conditions of novel 1200V silicon-carbide (SiC) power MOSFETs. The study is based on commercially available devices and delivers important insights into specific device features which have no counterpart in high voltage silicon (Si) transistors. The main aim is to provide indications for reliable power system development and inform the progression of device design in a broad application scenario and device types (e.g., implementation of SiC based solid-state current limiters/regulators;development of SiC Smart power technology).

关键词： development implementation current

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