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cylindrical with a tolerance of 10mm with respect to an
overall system diameter of 22m. The shape of the toroid
can only be controlled by installing the 8 coils in their
theoretical elliptical shape using high strenght bolting, and
then release the structure under its self weight. This paper
presents the concepts of the assembly of the toroid,
highlights the FEA calculations performed to predict the
shape, summarizes the tooling required and reviews the
experience gained during the installation.
POSTER SESSION 13:30 – 15:30
ENERGY STORAGE (II)
THA09PO01
Manufacturing and Testing of a 200 kJ Nb-Ti mSMES
M. Fabbri, A. Morandi, F. Negrini, P.L. Ribani, Department
of Electrical Engineering, University of Bologna; R. Penco,
M. Perrella, Ansaldo Superconduttori.
Withdrawn.
THA09PO02
Breakdown Characteristics in Vacuum for a
Conduction-Cooled HTS SMES
J. Lee, H-G. Cheon, S-H. Kim, Gyeonsang National
University; S-M. Baek, Changwon college; H-J. Kim, K-C.
Seong, KERI.
The commercial application of many HTS coil, however,
requires refrigeration at temperatures below 77 K, in order
to take advantage of a greater critical current density of
HTS and reduce considerably the size and weight of the
system. The magnet is operated in vacuum condition.
Thus, for the development of the coil, cryogenic insulation
design should be established to accomplish miniaturization
that is a big advantage of HTS SMES. Recently, research
and development concerning application of the conductioncooled
HTS SMES that is easily movement are actively
progressing in Korea. Electrical insulation under cryogenic
temperature is a key and an important element in the
application of this apparatus. However, the behaviors of
insulators for cryogenic conditions in air or vacuum are
virtually unknown. In this paper, we present and discuss
very fist results in this field, focused on several insulators
such as Al2O3 and AIN which have high thermal
conductivity and electrical. We summary the insulation
factors of a coil for HTS SMES. And we experiment the
spacer configure effect in the dielectric flashover
characteristics. Before we experiment the spacer configure
effect, we have been investigated a surface flashover with
several insulators as well as breakdown in air and vacuum.
From the results, we confirm that our research established
basic data in the insulation design of the coil.
THA09PO03
On-Line Measurement of Real Parts of Eigenvalues in
Multi-Machine Power System by Use of
Superconducting Magnetic Energy Storage
T. Yonezu, T. Nitta, The University of Tokyo; Y. Shirai, A.
Nakamaru, Kyoto University; K. Shibata, The Kansai
Electric Power Co., Inc.
Small signal stability of power systems is evaluated by
eigenvalues of state equations derived from system
models. The eigenvalues are currently given by off-line
computer analyses. However, parameters of power
systems used in the computation may not be obtained
accurately. If the eigenvalues can be measured directly
from operating power systems, it will contribute to make
power systems more stable and more economical than
they are now. Therefore, on-line measurement of the
eigenvalues by use of Superconducting Magnetic Energy
Storage (SMES) has been proposed. The eigenvalues of
power systems can be measured by analyzing the output
power of generators and transmission lines for small power
changes generated by SMES. It can give small power
changes without affecting operating conditions of the power
systems. For the waveforms of power changes from
SMES, sinusoidal signals and chirp signals have been
studied. In case of sinusoidal signals, the imaginary parts
of the eigenvalues can be measured in any power systems.
However, the real parts of them can be measured only in
one-machine infinite bus system. A new method using
power change of sinusoidal waveform for measurement of
the real parts of the eigenvalues of multi-machine power
system will be described in the paper. Some simulations
were carried out in order to examine the method by use of
analogue type power system simulators. The results of
simulations will be also described.
THA09PO04
Design of HTS Magnets for a 600 kJ SMES
W-S. Kim, S. Lee, S-Y. Hahn, Korea Electrical Engineering
and Science Research Institute; S-Y. Kwak, H-K. Jung,
Seoul National University; K-D. Choi, J-H. Han, Korea
Polytechnic University; J-K. Lee, Woosuk University; K-C.
Seong, Korea Electrotechnology Research Institute.
Development of a 600 kJ SMES system is in progress by
Korean Electric Research Institute (KERI). High
temperature superconducting wires are going to be used
for the windings of the system, and the design of the HTS
windings for the system is presented in this paper. We
considered BSCCO-2212 wire for the HTS windings which
is preferred in lower temperature environment to BSCCO-
2223 wire. The operating temperature of the winding was
decided to be 20K which will be accomplished by
conduction cooling method using cryo-coolers. Four
stacked BSCCO-2212 wire were used for design process
of the HTS windings, and the objective function of the
optimal process was the total amount of the HTS wire. This
HTS windings is going to be applied to the SMES system
whose purpose is stabilization of the power grid.
THA09PO05
Design study of a 54MJ class magnet of a SMES for
Power System Stabilization
H. Hayashi, T. Nagafuchi, Kyushu Electric Power Co., Inc.;
S. Okitsu, K. Takeuchi, Hitachi Ltd.
We have developed a SMES system for power system
stabilization, aiming at reducing the costs of the system.
The multi-pole solenoid coils of Bi2212 conductor for the
100MW/54MJ class SMES was designed with the rated
current of 3kA and maximum magnetic field of 10T. Our
study revealed that the maximum magnetic field applied to
the magnet is effective to reduce the magnet size and
volume, and in terms of magnetic stress applied to the
Bi2212 conductor and the support structure. The AC loss
mainly depending on histeresis loss was also calculated.
Thus, the authors confirmed the possibility of 54MJ class
SMES’s magnet for power system stabilization in a power
system.
THA09PO06
Heat transfer properties of a conduction cooled
prototype LTS pulse coil for UPS-SMES
A. Kawagoe, H. Yamamuro, F. Sumiyoshi, Kagoshima
University; T. Mito, H. Chikaraishi, T. Baba, NIFS; T.
Henmi, Gradient University for Advanced Studies; K.
Okumura, R. Abe, Technova Inc.; M. Iwakuma, Kyushu
141 MT-19 2005, Genova