SMES-UPS for large-scaled SC magnet system of LHD

Shuichi Yamada; T. Mito; H. Chikaraishi; A. Nishimura; H. Kojima; Y. Nakanishi; T. Uede; T. Satow; O. Motojima

doi:10.1016/S0920-3796(03)00297-7

SMES-UPS for large-scaled SC magnet system of LHD

Shuichi Yamada, T. Mito, H. Chikaraishi, A. Nishimura, H. Kojima, Y. Nakanishi, T. Uede, T. Satow, O. Motojima

Research output: Contribution to journal › Article › peer-review

Abstract

The LHD is an SC experimental fusion device of heliotron type. Eight sets of the helium compressors with total electric power of 3.5 MW are installed in the cryogenic system. The analytical studies of the SMES-UPS for the compressors under the deep voltage sag are reported in this paper. The amplitude and frequency of the voltage decrease gradually by the regenerating effect of the induction motors. The SMES-UPS system proposed in this report has the following functions; (1) variable frequency control, (2) regulations by ACR and AVR, and (3) rapid isolation and synchronous reconnection from the loads to grid line. We have demonstrated that SMES was useful for the large-scaled cryogenic system of the experimental fusion device.

Original language	English
Pages (from-to)	1149-1153
Number of pages	5
Journal	Fusion Engineering and Design
Volume	66-68
DOIs	https://doi.org/10.1016/S0920-3796(03)00297-7
Publication status	Published - 2003 Sep 1
Externally published	Yes

Keywords

Cryogenic system
Induction motor
LHD
SMES
UPS
Voltage sag

ASJC Scopus subject areas

Civil and Structural Engineering
Nuclear Energy and Engineering
Materials Science(all)
Mechanical Engineering

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title = "SMES-UPS for large-scaled SC magnet system of LHD",

abstract = "The LHD is an SC experimental fusion device of heliotron type. Eight sets of the helium compressors with total electric power of 3.5 MW are installed in the cryogenic system. The analytical studies of the SMES-UPS for the compressors under the deep voltage sag are reported in this paper. The amplitude and frequency of the voltage decrease gradually by the regenerating effect of the induction motors. The SMES-UPS system proposed in this report has the following functions; (1) variable frequency control, (2) regulations by ACR and AVR, and (3) rapid isolation and synchronous reconnection from the loads to grid line. We have demonstrated that SMES was useful for the large-scaled cryogenic system of the experimental fusion device.",

keywords = "Cryogenic system, Induction motor, LHD, SMES, UPS, Voltage sag",

author = "Shuichi Yamada and T. Mito and H. Chikaraishi and A. Nishimura and H. Kojima and Y. Nakanishi and T. Uede and T. Satow and O. Motojima",

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TY - JOUR

T1 - SMES-UPS for large-scaled SC magnet system of LHD

AU - Yamada, Shuichi

AU - Mito, T.

AU - Chikaraishi, H.

AU - Nishimura, A.

AU - Kojima, H.

AU - Nakanishi, Y.

AU - Uede, T.

AU - Satow, T.

AU - Motojima, O.

PY - 2003/9/1

Y1 - 2003/9/1

N2 - The LHD is an SC experimental fusion device of heliotron type. Eight sets of the helium compressors with total electric power of 3.5 MW are installed in the cryogenic system. The analytical studies of the SMES-UPS for the compressors under the deep voltage sag are reported in this paper. The amplitude and frequency of the voltage decrease gradually by the regenerating effect of the induction motors. The SMES-UPS system proposed in this report has the following functions; (1) variable frequency control, (2) regulations by ACR and AVR, and (3) rapid isolation and synchronous reconnection from the loads to grid line. We have demonstrated that SMES was useful for the large-scaled cryogenic system of the experimental fusion device.

AB - The LHD is an SC experimental fusion device of heliotron type. Eight sets of the helium compressors with total electric power of 3.5 MW are installed in the cryogenic system. The analytical studies of the SMES-UPS for the compressors under the deep voltage sag are reported in this paper. The amplitude and frequency of the voltage decrease gradually by the regenerating effect of the induction motors. The SMES-UPS system proposed in this report has the following functions; (1) variable frequency control, (2) regulations by ACR and AVR, and (3) rapid isolation and synchronous reconnection from the loads to grid line. We have demonstrated that SMES was useful for the large-scaled cryogenic system of the experimental fusion device.

KW - Cryogenic system

KW - Induction motor

KW - LHD

KW - SMES

KW - UPS

KW - Voltage sag

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