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Dr. Junji Tamura
Department of Electrical and Electronic Engineering, Kitami Institute of Technology, Japan.

Basic Info


Research Keywords & Expertise

0 Power System Stability
0 Power system analysis
0 Wind Power Generation
0 Synchronous generator
0 Virtual synchronous machines

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Research article
Published: 12 January 2021 in Electrical Engineering in Japan
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Penetration level of large‐scale wind farm into the existing power system has been increasing significantly which impacts on the transient stability during a network fault. This is because wind farm can be disconnected from the grid according to a grid code of the system when instantaneous voltage drop due to a network fault occurrs in the grid system. This paper proposes a new method to stabilize the system frequency drop and enhance the transient stability of the grid system by using a battery which is based on the new virtual synchronous generator control performed by the cooperative operation between the battery and LFC hydro power plant.

ACS Style

Kotaro Nagaushi; Atsushi Umemura; Rion Takahashi; Junji Tamura; Atsushi Sakahara; Fumihito Tosaka; Ryosuke Nakamoto. Virtual synchronous generator control of power system including large‐scale wind farm by cooperative operation between battery and LFC hydro power plant. Electrical Engineering in Japan 2021, 214, 1 .

AMA Style

Kotaro Nagaushi, Atsushi Umemura, Rion Takahashi, Junji Tamura, Atsushi Sakahara, Fumihito Tosaka, Ryosuke Nakamoto. Virtual synchronous generator control of power system including large‐scale wind farm by cooperative operation between battery and LFC hydro power plant. Electrical Engineering in Japan. 2021; 214 (2):1.

Chicago/Turabian Style

Kotaro Nagaushi; Atsushi Umemura; Rion Takahashi; Junji Tamura; Atsushi Sakahara; Fumihito Tosaka; Ryosuke Nakamoto. 2021. "Virtual synchronous generator control of power system including large‐scale wind farm by cooperative operation between battery and LFC hydro power plant." Electrical Engineering in Japan 214, no. 2: 1.

Journal article
Published: 18 December 2020 in Applied Sciences
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This paper proposes the application of an adjustable speed diesel engine-driven power plant employing a doubly-fed induction generator to an isolated small-scale power system including renewable power sources. This type of power plant can contribute to fast and flexible power balancing regulation under vacillating power supply such as wind, solar and other renewable power sources. Installation of a battery system is also considered, which can assist in coordinating the power plant to augment renewable power sources in the isolated power system.

ACS Style

Rion Takahashi; Atsushi Umemura; Junji Tamura. Cooperative Frequency Control of a Small-Scale Power System between Diesel Engine Driven Adjustable Speed Generator and Battery. Applied Sciences 2020, 10, 9085 .

AMA Style

Rion Takahashi, Atsushi Umemura, Junji Tamura. Cooperative Frequency Control of a Small-Scale Power System between Diesel Engine Driven Adjustable Speed Generator and Battery. Applied Sciences. 2020; 10 (24):9085.

Chicago/Turabian Style

Rion Takahashi; Atsushi Umemura; Junji Tamura. 2020. "Cooperative Frequency Control of a Small-Scale Power System between Diesel Engine Driven Adjustable Speed Generator and Battery." Applied Sciences 10, no. 24: 9085.

Journal article
Published: 17 December 2020 in Applied Sciences
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The penetration level of large-scale wind farms into power systems has been increasing significantly, and the frequency stability and transient stability of the power systems during and after a network fault can be negatively affected. This paper proposes a new control method to improve the stability of power systems that are composed of large wind farms, as well as usual synchronous generators. The new method is a coordinated controlling method between an adjustable-speed pumping generator (ASG) and a battery. The coordinated system is designed to improve power system stability during a disconnection in a fixed-rotor-speed wind turbine with a squirrel cage-type induction generator (FSWT-SCIG)-based wind farm due to a network fault, in which a battery first responds quickly to the system frequency deviation due to a grid fault and improves the frequency nadir, and then the ASG starts to supply compensatory power to recover the grid frequency to the rated frequency. The performance of the proposed system was confirmed through simulation studies on a power system model consisting of usual synchronous generators (SGs), an ASG, a battery, and an SCIG-based wind farm. Simulation results demonstrated that the proposed control system can enhance the stability of the power system effectively.

ACS Style

Junji Tamura; Atsushi Umemura; Rion Takahashi; Atsushi Sakahara; Fumihito Tosaka; Ryosuke Nakamoto. Enhancement of Power System Transient Stability by the Coordinated Control between an Adjustable Speed Pumping Generator and Battery. Applied Sciences 2020, 10, 9034 .

AMA Style

Junji Tamura, Atsushi Umemura, Rion Takahashi, Atsushi Sakahara, Fumihito Tosaka, Ryosuke Nakamoto. Enhancement of Power System Transient Stability by the Coordinated Control between an Adjustable Speed Pumping Generator and Battery. Applied Sciences. 2020; 10 (24):9034.

Chicago/Turabian Style

Junji Tamura; Atsushi Umemura; Rion Takahashi; Atsushi Sakahara; Fumihito Tosaka; Ryosuke Nakamoto. 2020. "Enhancement of Power System Transient Stability by the Coordinated Control between an Adjustable Speed Pumping Generator and Battery." Applied Sciences 10, no. 24: 9034.

Journal article
Published: 11 December 2020 in Applied Sciences
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This paper proposes a novel control method for enhancing transient stability by using renewable energy sources (RES). The kinetic energy accumulated in a rotor of variable speed wind generator (VSWG) is proactively used as the active power source, which is controlled according to the frequency measured at the wind farm. In addition, coordinated reactive power control according to the grid voltage is also carried out to more effectively use the kinetic energy of the VSWG. The effects of the proposed control system were evaluated by simulation analyses performed using a modified IEEE nine-bus power system network made up of synchronous generators (SGs), a photovoltaic (PV) system and a VSWG-based wind farm. Furthermore, the coordinated reactive power control between the VSWG and PV system was also demonstrated.

ACS Style

Masaki Yagami; Masanori Ichinohe; Junji Tamura. Enhancement of Power System Transient Stability by Active and Reactive Power Control of Variable Speed Wind Generators. Applied Sciences 2020, 10, 8874 .

AMA Style

Masaki Yagami, Masanori Ichinohe, Junji Tamura. Enhancement of Power System Transient Stability by Active and Reactive Power Control of Variable Speed Wind Generators. Applied Sciences. 2020; 10 (24):8874.

Chicago/Turabian Style

Masaki Yagami; Masanori Ichinohe; Junji Tamura. 2020. "Enhancement of Power System Transient Stability by Active and Reactive Power Control of Variable Speed Wind Generators." Applied Sciences 10, no. 24: 8874.

Journal article
Published: 16 October 2020 in Applied Sciences
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Wind power generation provides an attractive method for tackling global environmental issues. However, the power grid cannot accommodate large amount of wind farms (WFs) because the fluctuation of WF output degrades the power quality (frequency and voltage) in the power grid. Technical requirements that are related to WF power fluctuation are issued in many countries in order to introduce the WF without degrading power quality. Therefore, it is essential to smooth the WF output in order to satisfy the technical requirements. This paper proposes an operation methodology for a system that is composed of energy storage systems (ESSs) and WF by kinetic energy (KE) control. Moreover, an optimal KE control is presented. The economical aspect and the advantage of the proposed system are verified through scenario simulations.

ACS Style

Kenta Koiwa; Takuro Tawara; Mizuki Watanabe; Kang-Zhi Liu; Tadanao Zanma; Junji Tamura. Novel Cost Reduction Method for Wind Farms Associated with Energy Storage Systems by Optimal Kinetic Energy Control. Applied Sciences 2020, 10, 7223 .

AMA Style

Kenta Koiwa, Takuro Tawara, Mizuki Watanabe, Kang-Zhi Liu, Tadanao Zanma, Junji Tamura. Novel Cost Reduction Method for Wind Farms Associated with Energy Storage Systems by Optimal Kinetic Energy Control. Applied Sciences. 2020; 10 (20):7223.

Chicago/Turabian Style

Kenta Koiwa; Takuro Tawara; Mizuki Watanabe; Kang-Zhi Liu; Tadanao Zanma; Junji Tamura. 2020. "Novel Cost Reduction Method for Wind Farms Associated with Energy Storage Systems by Optimal Kinetic Energy Control." Applied Sciences 10, no. 20: 7223.

Journal article
Published: 01 February 2020 in Electronics
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Fixed speed wind turbine-squirrel cage induction generator (FSWT-SCIG)-based wind farms (WFs) are increasing significantly. However, FSWT-SCIGs have no low voltage ride-through (LVRT) and frequency control capabilities, which creates a significant problem on power system transient and steady-state stability. This paper presents a new operational strategy to control the voltage and frequency of the entire power system, including large-scale FSWT-SCIG-based WFs, by using a battery storage system (BSS). The proposed cascaded control of the BSS is designed to provide effective quantity of reactive power during transient periods, to augment LVRT capability and real power during steady-state periods in order to damp frequency fluctuations. The cascaded control technique is built on four proportional integral (PI) controllers. The droop control technique is also adopted to ensure frequency control capability. Practical grid code is taken to demonstrate the LVRT capability. To evaluate the validity of the proposed system, simulation studies are executed on a reformed IEEE nine-bus power system with three synchronous generators (SGs) and SCIG-based WF with BSS. Triple-line-to-ground (3LG) and real wind speed data are used to analyze the hybrid power grid’s transient and steady-state stability. The simulation results indicate that the proposed system can be an efficient solution to stabilize the power system both in transient and steady-state conditions.

ACS Style

Rifat Hazari; Effat Jahan; Mohammad Abdul Mannan; Junji Tamura. Coordinated Control Scheme of Battery Storage System to Augment LVRT Capability of SCIG-Based Wind Turbines and Frequency Regulation of Hybrid Power System. Electronics 2020, 9, 239 .

AMA Style

Rifat Hazari, Effat Jahan, Mohammad Abdul Mannan, Junji Tamura. Coordinated Control Scheme of Battery Storage System to Augment LVRT Capability of SCIG-Based Wind Turbines and Frequency Regulation of Hybrid Power System. Electronics. 2020; 9 (2):239.

Chicago/Turabian Style

Rifat Hazari; Effat Jahan; Mohammad Abdul Mannan; Junji Tamura. 2020. "Coordinated Control Scheme of Battery Storage System to Augment LVRT Capability of SCIG-Based Wind Turbines and Frequency Regulation of Hybrid Power System." Electronics 9, no. 2: 239.

Journal article
Published: 18 December 2019 in IEEE Transactions on Power Systems
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This paper proposes a novel control approach to reduce the rated power of energy storage system (ESS) in the smoothing of wind power output. Wind power generation causes frequency fluctuations in power systems. Therefore, ESSs are used to absorb the fluctuating power of wind generators. Generally, the controller in an ESS is composed of a first-order low-pass filter (FLF) with a large time constant. However, the FLF incurs a high cost because its phase-lag induces an unnecessary increase in the rated power of ESS This study addresses the reduction in the rated power of ESS without using a complex controller. First, the requirement of the controller is analyzed and its structure is proposed. Then, the absorption of the short-period wind power output is reduced by tuning a gain in the controller until the grid code is violated. The effectiveness of the proposed controller is verified by comparing it to the conventional controllers via scenario simulations using real wind data.

ACS Style

Kenta Koiwa; Tomoya Ishii; Kang-Zhi Liu; Tadanao Zanma; Junji Tamura. On the Reduction of the Rated Power of Energy Storage System in Wind Farms. IEEE Transactions on Power Systems 2019, 35, 2586 -2596.

AMA Style

Kenta Koiwa, Tomoya Ishii, Kang-Zhi Liu, Tadanao Zanma, Junji Tamura. On the Reduction of the Rated Power of Energy Storage System in Wind Farms. IEEE Transactions on Power Systems. 2019; 35 (4):2586-2596.

Chicago/Turabian Style

Kenta Koiwa; Tomoya Ishii; Kang-Zhi Liu; Tadanao Zanma; Junji Tamura. 2019. "On the Reduction of the Rated Power of Energy Storage System in Wind Farms." IEEE Transactions on Power Systems 35, no. 4: 2586-2596.

Journal article
Published: 28 November 2019 in IEEE Transactions on Industrial Electronics
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This paper addresses a controller for a full converter of variable-speed wind generators (VSWTs) composed of permanent magnet synchronous generators. Conventionally, several proportional-integral (PI) controllers and a phase lock loop (PLL) are used in the full converter for voltage-oriented control. The use of cascaded control loops with PI controllers degrades the control performance due to the wind-up of the integrators and complicates the tuning task. In this paper, we propose a new full converter control scheme based on predictive control and a single P-controller in the α-β stationary frame to replace the integrators and the PLL. The proposed controller can reduce the parameter tuning effort, is free from integrator wind-up and is robust to symmetrical and asymmetrical voltage dips. The effectiveness of the proposed method is verified through simulations.

ACS Style

Kenta Koiwa; Yinqxiao Li; Kang-Zhi Liu; Tadanao Zanma; Junji Tamura. Full Converter Control for Variable-Speed Wind Turbines Without Integral Controller or PLL. IEEE Transactions on Industrial Electronics 2019, 67, 9418 -9428.

AMA Style

Kenta Koiwa, Yinqxiao Li, Kang-Zhi Liu, Tadanao Zanma, Junji Tamura. Full Converter Control for Variable-Speed Wind Turbines Without Integral Controller or PLL. IEEE Transactions on Industrial Electronics. 2019; 67 (11):9418-9428.

Chicago/Turabian Style

Kenta Koiwa; Yinqxiao Li; Kang-Zhi Liu; Tadanao Zanma; Junji Tamura. 2019. "Full Converter Control for Variable-Speed Wind Turbines Without Integral Controller or PLL." IEEE Transactions on Industrial Electronics 67, no. 11: 9418-9428.

Journal article
Published: 01 August 2018 in IEEJ Transactions on Power and Energy
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Large integration of renewable energy sources (RESs), such as wind power and solar photovoltaic (PV) plants, into the power systems, impacts the system frequency stability. Normally, a wind farm (WF) and PV system do not provide frequency support because of the uncontrollability of the input energy. Moreover, overall system inertia will be reduced due to massive integration of RES because conventional generation units that provide reserve power need to be decreased. To overcome the problems of frequency stability as well as power system transient stability resulting from the insufficient inertia response, this paper proposes a new method to enhance the transient stability of the power system with RESs introduced, in which variable speed wind turbine with doubly fed induction generator (VSWT-DFIG) supplies its kinetic energy (KE) during generation outage to stabilize conventional synchronous generators (SGs). A suitable fuzzy logic based virtual inertia controller (VIC) is proposed to release the stored KE efficiently during transient period. This fuzzy logic controller (FLC) can continuously adjust the VIC gain depending upon the incoming wind speed. To verify the effectiveness of the proposed VIC, simulation analyses are performed on a multi-machine hybrid power system model composed of PV plant, VSWT-DFIG, fixed speed wind turbine with squirrel cage induction generator (FSWT-SCIG), and conventional SGs.

ACS Style

Rifat Hazari; Mohammad Abdul Mannan; S M Muyeen; Atsushi Umemura; Rion Takahashi; Junji Tamura. Fuzzy Logic based Virtual Inertia Control of DFIG based Wind Generator for Stability Improvement of Hybrid Power System. IEEJ Transactions on Power and Energy 2018, 138, 733 -744.

AMA Style

Rifat Hazari, Mohammad Abdul Mannan, S M Muyeen, Atsushi Umemura, Rion Takahashi, Junji Tamura. Fuzzy Logic based Virtual Inertia Control of DFIG based Wind Generator for Stability Improvement of Hybrid Power System. IEEJ Transactions on Power and Energy. 2018; 138 (8):733-744.

Chicago/Turabian Style

Rifat Hazari; Mohammad Abdul Mannan; S M Muyeen; Atsushi Umemura; Rion Takahashi; Junji Tamura. 2018. "Fuzzy Logic based Virtual Inertia Control of DFIG based Wind Generator for Stability Improvement of Hybrid Power System." IEEJ Transactions on Power and Energy 138, no. 8: 733-744.

Journal article
Published: 01 January 2018 in Journal of Power and Energy Engineering
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This paper presents a new operational strategy for a large-scale wind farm (WF) which is composed of both fixed speed wind turbines with squirrel cage induction generators (FSWT-SCIGs) and variable speed wind turbines with permanent magnet synchronous generators (VSWT-PMSGs). FSWT-SCIGs suffer greatly from meeting the requirements of fault ride through (FRT), because they are largely dependent on reactive power. Integration of flexible ac transmission system (FACTS) devices is a solution to overcome that problem, though it definitely increases the overall cost. Therefore, in this paper, a new method is proposed to stabilize FSWT-SCIGs by using VSWT-PMSGs in a WF. This is achieved by injecting the reactive power to the grid during fault condition by controlling the grid side converter (GSC) of PMSG. The conventional proportional-integral (PI)-based cascaded controller is usually used for GSC which can inject small amount of reactive power during fault period. Thus, it cannot stabilize larger rating of SCIG. In this paper, a suitable fuzzy logic controller (FLC) is proposed in the cascaded controller of GSC of PMSG in order to increase reactive power injection and thus improve the FRT capability of WF during voltage dip situation due to severe network fault. To evaluate the proposed controller performance, simulation analyses are performed on a modified IEEE nine-bus system. Simulation results clearly show that the proposed method can be a cost-effective solution which can effectively stabilize the larger rating of SCIG compared to conventional PI based control strategy.

ACS Style

Rifat Hazari; Mohammad Abdul Mannan; Atsushi Umemura; Rion Takahashi; Junji Tamura. Stabilization of Wind Farm by Using PMSG Based Wind Generator Taking Grid Codes into Consideration. Journal of Power and Energy Engineering 2018, 06, 40 -52.

AMA Style

Rifat Hazari, Mohammad Abdul Mannan, Atsushi Umemura, Rion Takahashi, Junji Tamura. Stabilization of Wind Farm by Using PMSG Based Wind Generator Taking Grid Codes into Consideration. Journal of Power and Energy Engineering. 2018; 06 (11):40-52.

Chicago/Turabian Style

Rifat Hazari; Mohammad Abdul Mannan; Atsushi Umemura; Rion Takahashi; Junji Tamura. 2018. "Stabilization of Wind Farm by Using PMSG Based Wind Generator Taking Grid Codes into Consideration." Journal of Power and Energy Engineering 06, no. 11: 40-52.

Journal article
Published: 01 January 2018 in Journal of Power and Energy Engineering
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In recent years, environmental problems are becoming serious and renewable energy has attracted attention as their solutions. However, the electricity generation using the renewable energy has a demerit that the output becomes unstable because of intermittent characteristics, such as variations of wind speed or solar radiation intensity. Frequency fluctuations due to the installation of large scale wind farm (WF) and photovoltaics (PV) into the power system is a major concern. In order to solve the problem, this paper proposes two control methods using High Voltage Direct Current (HVDC) interconnection line to suppress the frequency fluctuations due to large scale of WF and PV. Comparative analysis between these two control methods is presented in this paper. One proposed method is a frequency control using a notch filter, and the other is using a deadband. Validity of the proposed methods is verified through simulation analyses, which is performed on a multi-machine power system model.

ACS Style

Kimiko Tada; Takamasa Sato; Atsushi Umemura; Rion Takahashi; Junji Tamura; Yoshiharu Matsumura; Tsukasa Taguchi; Akira Yamada. Frequency Control of Power System with Solar and Wind Power Stations by Using Frequency Band Control and Deadband Control of HVDC Interconnection Line. Journal of Power and Energy Engineering 2018, 06, 48 -63.

AMA Style

Kimiko Tada, Takamasa Sato, Atsushi Umemura, Rion Takahashi, Junji Tamura, Yoshiharu Matsumura, Tsukasa Taguchi, Akira Yamada. Frequency Control of Power System with Solar and Wind Power Stations by Using Frequency Band Control and Deadband Control of HVDC Interconnection Line. Journal of Power and Energy Engineering. 2018; 06 (09):48-63.

Chicago/Turabian Style

Kimiko Tada; Takamasa Sato; Atsushi Umemura; Rion Takahashi; Junji Tamura; Yoshiharu Matsumura; Tsukasa Taguchi; Akira Yamada. 2018. "Frequency Control of Power System with Solar and Wind Power Stations by Using Frequency Band Control and Deadband Control of HVDC Interconnection Line." Journal of Power and Energy Engineering 06, no. 09: 48-63.

Journal article
Published: 24 December 2017 in Applied Sciences
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Wind farm (WF) grid codes require wind generators to have low voltage ride through (LVRT) capability, which means that normal power production should be resumed quickly once the nominal grid voltage has been recovered. However, WFs with fixed-speed wind turbines with squirrel cage induction generators (FSWT-SCIGs) have failed to fulfill the LVRT requirement, which has a significant impact on power system stability. On the other hand, variable-speed wind turbines with doubly fed induction generators (VSWT-DFIGs) have sufficient LVRT augmentation capability and can control the active and reactive power delivered to the grid. However, the DFIG is more expensive than the SCIG due to its AC/DC/AC converter. Therefore, the combined use of SCIGs and DFIGs in a WF could be an effective solution. The design of the rotor-side converter (RSC) controller is crucial because the RSC controller contributes to the system stability. The cascaded control strategy based on four conventional PI controllers is widely used to control the RSC of the DFIG, which can inject only a small amount of reactive power during fault conditions. Therefore, the conventional strategy can stabilize the lower rating of the SCIG. In the present paper, a new control strategy based on fuzzy logic is proposed in the RSC controller of the DFIG in order to enhance the LVRT capability of the SCIG in a WF. The proposed fuzzy logic controller (FLC) is used to control the reactive power delivered to the grid during fault conditions. Moreover, reactive power injection can be increased in the proposed control strategy. Extensive simulations executed in the PSCAD/EMTDC environment for both the proposed and conventional PI controllers of the RSC of the DFIG reveal that the proposed control strategy can stabilize the higher rating of the SCIG.

ACS Style

Rifat Hazari; Mohammad Abdul Mannan; S. M. Muyeen; Atsushi Umemura; Rion Takahashi; Junji Tamura. Stability Augmentation of a Grid-Connected Wind Farm by Fuzzy-Logic-Controlled DFIG-Based Wind Turbines. Applied Sciences 2017, 8, 20 .

AMA Style

Rifat Hazari, Mohammad Abdul Mannan, S. M. Muyeen, Atsushi Umemura, Rion Takahashi, Junji Tamura. Stability Augmentation of a Grid-Connected Wind Farm by Fuzzy-Logic-Controlled DFIG-Based Wind Turbines. Applied Sciences. 2017; 8 (1):20.

Chicago/Turabian Style

Rifat Hazari; Mohammad Abdul Mannan; S. M. Muyeen; Atsushi Umemura; Rion Takahashi; Junji Tamura. 2017. "Stability Augmentation of a Grid-Connected Wind Farm by Fuzzy-Logic-Controlled DFIG-Based Wind Turbines." Applied Sciences 8, no. 1: 20.

Article
Published: 21 June 2017 in Electrical Engineering in Japan
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As more and more wind farms are installed in power systems around the world, frequency fluctuations due to output power variations have become a serious problem. Various countermeasures for the problem, such as battery systems, have been investigated. It is very important to evaluate the magnitude of the frequency fluctuations in order to design compensating systems. This paper presents a new and simple method to evaluate the expected value of the frequency deviation due to variations in wind farm output, which is based on the intensity of turbulence and annual probability distribution for the wind speed.

ACS Style

Junji Tamura; Kazuki Kawamata; Rion Takahashi; Atsushi Umemura; Mamoru Kimura; Aung Ko Thet. A Calculation Method for Power System Frequency Deviation Considering Intensity of Turbulence. Electrical Engineering in Japan 2017, 201, 13 -24.

AMA Style

Junji Tamura, Kazuki Kawamata, Rion Takahashi, Atsushi Umemura, Mamoru Kimura, Aung Ko Thet. A Calculation Method for Power System Frequency Deviation Considering Intensity of Turbulence. Electrical Engineering in Japan. 2017; 201 (1):13-24.

Chicago/Turabian Style

Junji Tamura; Kazuki Kawamata; Rion Takahashi; Atsushi Umemura; Mamoru Kimura; Aung Ko Thet. 2017. "A Calculation Method for Power System Frequency Deviation Considering Intensity of Turbulence." Electrical Engineering in Japan 201, no. 1: 13-24.

Journal article
Published: 28 April 2017 in Journal of Mechanics Engineering and Automation
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ACS Style

Linda Sartika; Atsushi Umemura; Rion Takahashi; Junji Tamura. Enhancement of DC-Link Protection of PMSG Based Wind Turbine under Network Disturbance by Using New Buck Controller System. Journal of Mechanics Engineering and Automation 2017, 7, 1 .

AMA Style

Linda Sartika, Atsushi Umemura, Rion Takahashi, Junji Tamura. Enhancement of DC-Link Protection of PMSG Based Wind Turbine under Network Disturbance by Using New Buck Controller System. Journal of Mechanics Engineering and Automation. 2017; 7 (4):1.

Chicago/Turabian Style

Linda Sartika; Atsushi Umemura; Rion Takahashi; Junji Tamura. 2017. "Enhancement of DC-Link Protection of PMSG Based Wind Turbine under Network Disturbance by Using New Buck Controller System." Journal of Mechanics Engineering and Automation 7, no. 4: 1.

Journal article
Published: 01 January 2014 in Journal of the Japan Institute of Power Electronics
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ACS Style

Atsushi Umemura; Rion Takahashi; Junji Tamura. A Consideration on Inverter Control for Grid Connected Wind Power Generator. Journal of the Japan Institute of Power Electronics 2014, 40, 105 -111.

AMA Style

Atsushi Umemura, Rion Takahashi, Junji Tamura. A Consideration on Inverter Control for Grid Connected Wind Power Generator. Journal of the Japan Institute of Power Electronics. 2014; 40 ():105-111.

Chicago/Turabian Style

Atsushi Umemura; Rion Takahashi; Junji Tamura. 2014. "A Consideration on Inverter Control for Grid Connected Wind Power Generator." Journal of the Japan Institute of Power Electronics 40, no. : 105-111.

Conference paper
Published: 01 September 2013 in Journal of international Conference on Electrical Machines and Systems
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ACS Style

Kyouhei Nakajima; Atsushi Umemura; Rion Takahashi; Junji Tamura. Design of Battery System for Smoothing Wind Power Variations in Power System based on Frequency Response Analysis. Journal of international Conference on Electrical Machines and Systems 2013, 2, 342 -348.

AMA Style

Kyouhei Nakajima, Atsushi Umemura, Rion Takahashi, Junji Tamura. Design of Battery System for Smoothing Wind Power Variations in Power System based on Frequency Response Analysis. Journal of international Conference on Electrical Machines and Systems. 2013; 2 (3):342-348.

Chicago/Turabian Style

Kyouhei Nakajima; Atsushi Umemura; Rion Takahashi; Junji Tamura. 2013. "Design of Battery System for Smoothing Wind Power Variations in Power System based on Frequency Response Analysis." Journal of international Conference on Electrical Machines and Systems 2, no. 3: 342-348.

Conference paper
Published: 01 March 2013 in Journal of international Conference on Electrical Machines and Systems
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ACS Style

Marwan Rosyadi; Rion Takahashi; S M Muyeen; Junji Tamura. Stabilization of Fixed Speed Wind Generator by using Variable Speed PM Wind Generator in Multi-Machine Power System. Journal of international Conference on Electrical Machines and Systems 2013, 2, 111 -119.

AMA Style

Marwan Rosyadi, Rion Takahashi, S M Muyeen, Junji Tamura. Stabilization of Fixed Speed Wind Generator by using Variable Speed PM Wind Generator in Multi-Machine Power System. Journal of international Conference on Electrical Machines and Systems. 2013; 2 (1):111-119.

Chicago/Turabian Style

Marwan Rosyadi; Rion Takahashi; S M Muyeen; Junji Tamura. 2013. "Stabilization of Fixed Speed Wind Generator by using Variable Speed PM Wind Generator in Multi-Machine Power System." Journal of international Conference on Electrical Machines and Systems 2, no. 1: 111-119.

Conference paper
Published: 01 March 2013 in Journal of international Conference on Electrical Machines and Systems
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ACS Style

Liu Junqiao; Marwan Rosyadi; Rion Takahashi; Junji Tamura; Tomoyuki Fukushima; Atsushi Sakahara; Koji Shinya; Kazuki Yosioka. Mitigation of Load Frequency Fluctuation Using a Centralized Pitch Angle Control of Wind Turbines. Journal of international Conference on Electrical Machines and Systems 2013, 2, 104 -110.

AMA Style

Liu Junqiao, Marwan Rosyadi, Rion Takahashi, Junji Tamura, Tomoyuki Fukushima, Atsushi Sakahara, Koji Shinya, Kazuki Yosioka. Mitigation of Load Frequency Fluctuation Using a Centralized Pitch Angle Control of Wind Turbines. Journal of international Conference on Electrical Machines and Systems. 2013; 2 (1):104-110.

Chicago/Turabian Style

Liu Junqiao; Marwan Rosyadi; Rion Takahashi; Junji Tamura; Tomoyuki Fukushima; Atsushi Sakahara; Koji Shinya; Kazuki Yosioka. 2013. "Mitigation of Load Frequency Fluctuation Using a Centralized Pitch Angle Control of Wind Turbines." Journal of international Conference on Electrical Machines and Systems 2, no. 1: 104-110.

Journal article
Published: 01 January 2013 in IEEJ Transactions on Power and Energy
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ACS Style

Junji Tamura; Marwan Rosyadi; Rion Takahashi; Atsushi Umemura; Tomoyuki Fukushima; Akira Kuwayama; Kazuki Yoshioka; Tomohisa Kaiso. A Calculation Method for Frequency and Voltage Fluctuations of Power System with Wind Generators. IEEJ Transactions on Power and Energy 2013, 133, 791 -792.

AMA Style

Junji Tamura, Marwan Rosyadi, Rion Takahashi, Atsushi Umemura, Tomoyuki Fukushima, Akira Kuwayama, Kazuki Yoshioka, Tomohisa Kaiso. A Calculation Method for Frequency and Voltage Fluctuations of Power System with Wind Generators. IEEJ Transactions on Power and Energy. 2013; 133 (10):791-792.

Chicago/Turabian Style

Junji Tamura; Marwan Rosyadi; Rion Takahashi; Atsushi Umemura; Tomoyuki Fukushima; Akira Kuwayama; Kazuki Yoshioka; Tomohisa Kaiso. 2013. "A Calculation Method for Frequency and Voltage Fluctuations of Power System with Wind Generators." IEEJ Transactions on Power and Energy 133, no. 10: 791-792.

Journal article
Published: 01 January 2013 in IEEJ Transactions on Power and Energy
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ACS Style

Junji Tamura; Kazuki Kawamata; Rion Takahashi; Atsushi Umemura. A Calculation Method for Power System Frequency Deviation Considering Intensity of Turbulence. IEEJ Transactions on Power and Energy 2013, 133, 723 -724.

AMA Style

Junji Tamura, Kazuki Kawamata, Rion Takahashi, Atsushi Umemura. A Calculation Method for Power System Frequency Deviation Considering Intensity of Turbulence. IEEJ Transactions on Power and Energy. 2013; 133 (9):723-724.

Chicago/Turabian Style

Junji Tamura; Kazuki Kawamata; Rion Takahashi; Atsushi Umemura. 2013. "A Calculation Method for Power System Frequency Deviation Considering Intensity of Turbulence." IEEJ Transactions on Power and Energy 133, no. 9: 723-724.