&lt;b&gt;Verification of the Reliability of a Superconducting Flywheel Energy Storage System and Its Application to the Railway System&lt;/b&gt;

Yamashita, Tomohisa; Ogata, Masafumi; Matsue, Hitoshi; Miyazaki, Yoshiki; Sugino, Motohiko; Nagashima, K.

doi:10.2219/rtriqr.58.4_303

Cited by 5 publications

(4 citation statements)

References 2 publications

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“…The imbalance of the flywheel rotor was reduced to 40 g below the target. In the rotation speed improvement test, it reached the maximum rotation speed of 3000 min -1 without any field balance adjustments [3].…”

Section: Smmentioning

confidence: 95%

<b>Development of a Superconducting Magnetic Bearing Capable of Supporting Large Loads in a Flywheel Energy Storage System for Railway Application</b>

et al. 2020

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Application of the flywheel energy storage system (FESS) using high temperature superconducting magnetic bearings (SMB) has been demonstrated at the Komekurayama photovoltaic power plant located in Yamanashi Prefecture. In order for the FESS to be applied to railways as a system able to prevent cancellation of regenerative braking its storage capacity must be increased. Therefore, levitation force tests up to 158 kN and tests to determine the creep characteristics of the levitation force were carried out to verify the margin in SMB levitation force. Furthermore, to evaluate long-term reliability and durability of the levitation and rotation characteristics of the SMB against repeated change in rotation speed, new SMB test apparatus capable of simultaneously testing both the levitating and rotating states of the SMB is being developed.

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Section: Smmentioning

confidence: 95%

<b>Development of a Superconducting Magnetic Bearing Capable of Supporting Large Loads in a Flywheel Energy Storage System for Railway Application</b>

et al. 2020

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“…On the other hand, the attempts are currently underway to develop a superconducting magnetic bearing with high-temperature superconducting coils and bulks for flywheel-based RBS [41,42]. The public data showed that the superconducting magnetic bearing can provide a stable levitation of 158 kN, 7% over the target value, and its levitation force decrease was 1.3% for 8 h. It was reported that the levitation height of the flywheel can be kept constant by controlling the current applied to the superconducting coils if the flux creep characteristics are at this level [43]. These results verify the feasibility of the superconducting magnetic bearing used on a FES for the application of RBS.…”

Section: Flywheel Energy Storage (Fes)mentioning

confidence: 99%

Exploration on the application of a new type of superconducting energy storage for regenerative braking in urban rail transit

Li,

Yang,

et al. 2023

Supercond. Sci. Technol.

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Regenerative braking technology has become increasingly attractive due to its ability to recover and reuse the energy that would otherwise be lost. In recent years, a new superconducting energy storage technology is proposed and it has been proved experimentally and analytically that the technology has promising application potential in urban rail transit for regenerative braking. However, a comprehensive assessment of the new technology has not been conducted up to date. In this paper, the currently available energy storage technologies for regenerative braking, such as batteries, supercapacitors, flywheels, and SMES are introduced along with the new superconducting energy storage technology. Comparative studies between the existing technologies and the new one are conducted in terms of energy density, energy conversion efficiency, energy storage duration, capital cost and environmental impact. It is concluded that a regenerative braking system with the new superconducting energy storage has very high cycle efficiency and is superior to the existing energy storage systems. It has the potential to revolutionize the regenerative braking technology and to develop more efficient and sustainable urban rail transportation systems.

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“…Because there is no force acting on the radial direction, and because the HTS block and the coil are rotationally symmetrical, the HTS block presents a suspended state without any friction loss. In the internal container, helium is used for cooling, and the pressure is about 10 Pa [6] .…”

Section: Structure and Working Principle Of Fessmentioning

confidence: 99%

Control technology and development status of flywheel energy storage system

Jia

Zhang

et al. 2022

ITM Web Conf.

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Flywheel energy storage technology has attracted more and more attention in the energy storage industry due to its high energy density, fast charge and discharge speed, long service life, clean and pollution-free characteristics. It is wwidely used in uninterruptible power system, grid frequency modulation, energy recovery and reuse and other fields. With the development of flywheel rotor materials, motors, bearings and control technology, flywheel energy storage technology has been greatly developed. Introducing the basic structure of the flywheel energy storage system in the above three applications. Typical charge-discharge control strategies are given for the three sensor-less algorithms of model reference adaptive control, sliding mode observer andextended Kalman filter, which are suitable for flywheel energy storage devices.

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<b>Verification of the Reliability of a Superconducting Flywheel Energy Storage System and Its Application to the Railway System</b>

Abstract: Motohiko SUGINO

Cited by 5 publications

References 2 publications

<b>Development of a Superconducting Magnetic Bearing Capable of Supporting Large Loads in a Flywheel Energy Storage System for Railway Application</b>

<b>Development of a Superconducting Magnetic Bearing Capable of Supporting Large Loads in a Flywheel Energy Storage System for Railway Application</b>

Exploration on the application of a new type of superconducting energy storage for regenerative braking in urban rail transit

Control technology and development status of flywheel energy storage system

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