The Experts below are selected from a list of 385659 Experts worldwide ranked by ideXlab platform
Weijia Yuan - One of the best experts on this subject based on the ideXlab platform.
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a superconducting Magnetic Energy storage emulator battery supported dynamic voltage restorer
IEEE Transactions on Energy Conversion, 2017Co-Authors: Anthony M Gee, F V P Robinson, Weijia YuanAbstract:This study examines the use of superconducting Magnetic and battery hybrid Energy storage to compensate grid voltage fluctuations. The superconducting Magnetic Energy storage system (SMES) has been emulated by a high-current inductor to investigate a system employing both SMES and battery Energy storage experimentally. The design of the laboratory prototype is described in detail, which consists of a series-connected three phase voltage source inverter used to regulate ac voltage, and two bidirectional dc/dc converters used to control Energy storage system charge and discharge. “DC bus level signaling” and “voltage droop control” have been used to automatically control power from the Magnetic Energy storage system during short-duration, high-power voltage sags, while the battery is used to provide power during longer term, low-power undervoltages. Energy storage system hybridization is shown to be advantageous by reducing battery peak power demand compared with a battery-only system, and by improving long-term voltage support capability compared with an SMES-only system. Consequently, the SMES/battery hybrid dynamic voltage restorer can support both short-term high-power voltage sags and long-term undervoltages with significantly reduced superconducting material cost compared with an SMES-based system.
R Shimada - One of the best experts on this subject based on the ideXlab platform.
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power factor correction using Magnetic Energy recovery current switches
Electrical Engineering in Japan, 2007Co-Authors: Taku Takaku, Takanori Isobe, Jun Narushima, H Tsutsui, R ShimadaAbstract:In this paper, we propose a Magnetic Energy Recovery Switch (MERS). The switch consists of four MOSFET elements and one capacitor. A power factor improvement is automatically possible regardless of the impedance and power frequency of the load by synchronized switching of MERS with a power supply. MERS itself generates voltage and compensates for the inductance voltage unlike a conventional series capacitor, so that another DC power supply is not needed. An experiment was carried out to demonstrate the automatic correction of the power factor. We can also expect Energy saving of electromachines such as an electric motor by the power factor correction with MERS. © 2007 Wiley Periodicals, Inc. Electr Eng Jpn, 160(3): 56–62, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.20321
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series connected power flow control using Magnetic Energy recovery switch mers
Power Conversion Conference, 2007Co-Authors: J A Wiik, Takanori Isobe, F D Widjaya, Tadayuki Kitahara, R ShimadaAbstract:A new series connected power flow controller, called the Magnetic Energy recovery switch, has been investigated. It is characterized by four active switches and a dc-capacitor in each phase. The device is capable of injecting up to rated voltage within the current rating. It behaves similar to a controllable voltage source and a variable capacitor connected in series. A control algorithm has been developed in order to facilitate power flow control with these combined characteristics. Experimental results suggest the MERS to be a promising new power flow controller.
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power factor correction using Magnetic Energy recovery current switches
Ieej Transactions on Industry Applications, 2005Co-Authors: Taku Takaku, Takanori Isobe, Jun Narushima, H Tsutsui, R ShimadaAbstract:In this paper, we propose a Magnetic Energy Recovery Switch (MERS). The switch consists of four MOSFET elements and one capacitor. A power factor improvement is automatically possible regardless of the impedance and power frequency of the load by synchronized switching of MERS with a power supply. MERS itself generates voltage and compensates for the inductance voltage unlike a conventional series capacitor, so that another dc power supply is not needed. An experiment was carried out to demonstrate the automatic correction of the power factor. We can also expect Energy saving of electromachies such as an electric motor by the power factor correction with MERS.
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power supply for pulsed magnets with Magnetic Energy recovery current switch
IEEE Transactions on Applied Superconductivity, 2004Co-Authors: Taku Takaku, Takanori Isobe, Jun Narushima, R ShimadaAbstract:In this paper, we propose a power supply with Magnetic Energy recovery current switch for pulsed magnets, such as the synchrotron accelerator bending magnets, magnetizer. The switch which consists of four MOSFET elements and one capacitor, generates a fast pulsed current with low voltage, and it improves the power factor. The switch absorbs the Magnetic Energy stored in the inductance of the load into the capacitor. And in next time on, it regenerates the Energy to the load. In addition, this switch operates in zero-voltage switching and zero-current switching, and the switching loss is very small. In order to turn on the load current at high speed in the circuit with an inductance, high voltage of several times higher than the voltage which maintains steady current. Therefore, by adopting this switch in the power source for pulsed power supply, high-speed pulsed current is efficiently generated by recovering the Magnetic Energy which has been stored in the inductance to the load in the next time on. As an application of DC circuit, a semiconductor Marx-generator which generates the high voltage pulse composed of a multistage Magnetic Energy recovery is described.
A H Coonick - One of the best experts on this subject based on the ideXlab platform.
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a linear matrix inequality approach to robust damping control design in power systems with superconducting Magnetic Energy storage device
IEEE Transactions on Power Systems, 2000Co-Authors: B C Pal, A H Coonick, Imad M Jaimoukha, Haitham ElzobaidiAbstract:This paper presents a systematic design procedure for a robust damping controller based on the linear matrix inequality (LMI) approach employing a superconducting Magnetic Energy storage (SMES) device. The design procedure takes advantage of the multi-objective features of LMI based design techniques. The procedure is applied to enhance the damping of inter-area oscillations in a two-area four-machine test system.
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robust damping controller design in power systems with superconducting Magnetic Energy storage devices
IEEE Transactions on Power Systems, 2000Co-Authors: A H Coonick, D C MacdonaldAbstract:Summary form only given as follows. The decentralized design of low-order robust damping controllers is presented based on a weighted and normalized eigenvalue-distance minimization method (WNEDM) employing several superconducting Magnetic Energy storage (SMES) devices. These controllers an aimed at enhancing the damping of multiple inter-area modes in a large power system. This paper describes a comprehensive and systematic way of designing these controllers. Nonlinear simulations further verify the robustness of the damping controllers for various operating conditions.
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robust damping of interarea oscillations in power systems with superconducting Magnetic Energy storage devices
IEE Proceedings - Generation Transmission and Distribution, 1999Co-Authors: A H Coonick, B J CoryAbstract:The decentralised design of robust damping controllers is presented based on the linear matrix inequality (LMI) approach employing several superconducting Magnetic Energy storage (SMES) devices. These controllers are aimed at enhancing the damping of multiple inter-area modes in a large power system. The paper describes a comprehensive and systematic way of designing these controllers. Eigenvalue technique and nonlinear simulations further verify the robustness of the damping controllers for various operating conditions and load characteristics.
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robust damping of inter area oscillations in power systems with superconducting Magnetic Energy storage devices
IEE Proceedings - Generation Transmission and Distribution, 1999Co-Authors: B C Pal, A H Coonick, B J CoryAbstract:The decentralised design of robust damping controllers is presented based on the linear matrix inequality (LMI) approach employing several superconducting Magnetic Energy storage (SMES) devices. These controllers are aimed at enhancing the damping of multiple inter-area modes in a large power system. The paper describes a comprehensive and systematic way of designing these controllers. Eigenvalue technique and nonlinear simulations further verify the robustness of the damping controllers for various operating conditions and load characteristics.
Anthony M Gee - One of the best experts on this subject based on the ideXlab platform.
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a superconducting Magnetic Energy storage emulator battery supported dynamic voltage restorer
IEEE Transactions on Energy Conversion, 2017Co-Authors: Anthony M Gee, F V P Robinson, Weijia YuanAbstract:This study examines the use of superconducting Magnetic and battery hybrid Energy storage to compensate grid voltage fluctuations. The superconducting Magnetic Energy storage system (SMES) has been emulated by a high-current inductor to investigate a system employing both SMES and battery Energy storage experimentally. The design of the laboratory prototype is described in detail, which consists of a series-connected three phase voltage source inverter used to regulate ac voltage, and two bidirectional dc/dc converters used to control Energy storage system charge and discharge. “DC bus level signaling” and “voltage droop control” have been used to automatically control power from the Magnetic Energy storage system during short-duration, high-power voltage sags, while the battery is used to provide power during longer term, low-power undervoltages. Energy storage system hybridization is shown to be advantageous by reducing battery peak power demand compared with a battery-only system, and by improving long-term voltage support capability compared with an SMES-only system. Consequently, the SMES/battery hybrid dynamic voltage restorer can support both short-term high-power voltage sags and long-term undervoltages with significantly reduced superconducting material cost compared with an SMES-based system.
D C Macdonald - One of the best experts on this subject based on the ideXlab platform.
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robust damping controller design in power systems with superconducting Magnetic Energy storage devices
IEEE Transactions on Power Systems, 2000Co-Authors: A H Coonick, D C MacdonaldAbstract:Summary form only given as follows. The decentralized design of low-order robust damping controllers is presented based on a weighted and normalized eigenvalue-distance minimization method (WNEDM) employing several superconducting Magnetic Energy storage (SMES) devices. These controllers an aimed at enhancing the damping of multiple inter-area modes in a large power system. This paper describes a comprehensive and systematic way of designing these controllers. Nonlinear simulations further verify the robustness of the damping controllers for various operating conditions.
