Effects of Nonlinearity of Magnetic Force on Passing Through a Critical Speed of a Rotor With a Superconducting Bearing

Yubisui, Yu; Kobayashi, Shintaro; Amano, Ryosuke; Sugiura, Toshihiko

doi:10.1109/tasc.2013.2245371

Cited by 14 publications

(2 citation statements)

References 7 publications

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“…There are five main energy storage technologies, including storage batteries, super-capacitors, pumped storage, compressed air energy storage (CAES) and flywheel energy storage (FES) [3,4]. Table 1 shows a comparison between the five storage technologies [5][6][7][8]. As is seen from the Table, it is obvious that FES has the advantages of high power density, high storage density, rapid charge and discharge, easy installation and maintenance, high cyclic-life, and being environmentally friendly.…”

Section: Introductionmentioning

confidence: 99%

Research on the Torque and Back EMF Performance of a High Speed PMSM Used for Flywheel Energy Storage

Zhao

et al. 2015

Energies

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Abstract:Due to advantages such as high energy density, high power density, rapid charge and discharge, high cyclic-life, and environmentally friendly, flywheel energy storage systems (FESs) are widely used in various fields. However, the performance of FES systems depends on the performance of a high speed machine, therefore, the design and optimization of a high efficiency and high power density machine are very crucial to improve the performance of the whole FES system. In this paper, a high speed permanent-magnet synchronous machine (PMSM) is researched. Considering the requirement of low torque ripple in low speed and loss caused by back electromotive force (EMF) harmonics, the electromagnetic performance is improved from points of view of slot/pole matching, magnetic-pole embrace with the finite element method (FEM). Furthermore, the magnetic-pole eccentricity, the slot opening, the thickness of PM and air-gap length are also optimized with Taguchi method. The electromagnetic performance, such as torque ripple, cogging torque, average torque and back EMF wave are much improved after optimization. Finally, experiments are carried out to verify the calculated results.

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Section: Introductionmentioning

confidence: 99%

Research on the Torque and Back EMF Performance of a High Speed PMSM Used for Flywheel Energy Storage

Zhao

et al. 2015

Energies

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“…Damping features and controllable strategy of flywheel energy storage device [5], flexible power conditioner [6], and static series compensator [7] were studied to improve damping of the power system in previous research. But the cost of large-scale power electronic equipment is so high that it limits the application.…”

Section: Introductionmentioning

confidence: 99%

Coordinated Stability Control of Wind-Thermal Hybrid AC/DC Power System

Yao

Hao

Chen

et al. 2015

Mathematical Problems in Engineering

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The wind-thermal hybrid power transmission will someday be the main form of transmitting wind power in China but such transmission mode is poor in system stability. In this paper, a coordinated stability control strategy is proposed to improve the system stability. Firstly, the mathematical model of doubly fed wind farms and DC power transmission system is established. The rapid power controllability of large-scale wind farms is discussed based on DFIG model and wide-field optical fiber delay feature. Secondly, low frequency oscillation and power-angle stability are analyzed and discussed under the hybrid transmission mode of a conventional power plant with wind farms. A coordinated control strategy for the wind-thermal hybrid AC/DC power system is proposed and an experimental prototype is made. Finally, real time simulation modeling is set up through Real Time Digital Simulator (RTDS), including wind power system and synchronous generator system and DC power transmission system. The experimental prototype is connected with RTDS for joint debugging. Joint debugging result shows that, under the coordinated control strategy, the experimental prototype is conductive to enhance the grid damping and effectively prevents the grid from occurring low frequency oscillation. It can also increase the transient power-angle stability of a power system.

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Magnetic Levitation

Hull

2015

Wiley Encyclopedia of Electrical and Electronics Engineering

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Effects of Nonlinearity of Magnetic Force on Passing Through a Critical Speed of a Rotor With a Superconducting Bearing

Cited by 14 publications

References 7 publications

Research on the Torque and Back EMF Performance of a High Speed PMSM Used for Flywheel Energy Storage

Research on the Torque and Back EMF Performance of a High Speed PMSM Used for Flywheel Energy Storage

Coordinated Stability Control of Wind-Thermal Hybrid AC/DC Power System

Magnetic Levitation

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