Balanced Three-Phase Distributions of Tri-Axial Cable for Transmission Line

Hamajima, T.; Hu, Nannan; Ozcivan, Nuri; Soeda, Seiji; Yagai, Tsuyoshi; Tsuda, Makoto

doi:10.1109/tasc.2009.2018452

Cited by 12 publications

(8 citation statements)

References 15 publications

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“…In our previous paper, we proposed a new cable design which is composed of two longitudinal sections with different twist pitch. Current test results demonstrate that reasonable twist pitch combinations can give a balanced current distribution due to symmetrical inductance distribution in three phases [1].…”

Section: Introductionmentioning

confidence: 95%

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Fault Current Analysis in a Tri-Axial HTS Cable

Takada

Ozcivan

et al. 2010

IEEE Trans. Appl. Supercond.

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Tri-axial cable has been rapidly developed recently because of the advantages such as more compact structure, small leakage field, and low heat and AC losses. One the other hand, it causes an inherent imbalanced three-phase currents distribution due to the different radii of concentric layers. In our previous research, it is demonstrated that a proposed tri-axial cable composed of two longitudinal sections with adjusted twist pitches can transmit balanced three-phase currents. However, before the cable can be installed in a real grid, the heat reliability of the cable in steady-state operation and fault condition should be ensured. The heat balance calculation of the tri-axial cable in steady state under the balanced current distribution allows us to estimate thermal parameters of the cable such as inlet and outlet temperatures, pressure drop and operation temperature. When a phase current suddenly changes under fault conditions, the remaining phase currents become large because of mutual inductances between fault and sound phases. Simulation of the typical fault suggests the copper stabilizer amount on the HTS tape for stability and safety. It is found that copper of 2 mm in thickness keeps the cable temperature under 110 K.Index Terms-Fault current, HTS power cable, stabilizer, triaxial cable.

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Section: Introductionmentioning

confidence: 95%

“…T RI-AXIAL HTS cable has been intensively investigated and recently connected to the commercial power network in practice project [1]- [4]. A traditional one section tri-axial cable, which has three-phase concentric structure, induces imbalance in three-phase currents.…”

Section: Introductionmentioning

confidence: 99%

Fault Current Analysis in a Tri-Axial HTS Cable

Takada

Ozcivan

et al. 2010

IEEE Trans. Appl. Supercond.

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“…Based on the line constant calculation, a simulation of a 50 MVA/6.6 kV 5 km long tri-axial cable was carried out in EMTP to analyze the influence of unsymmetrical capacitance distribution. For high voltage class and long distance cable, adding external capacitances can improve the current distribution [6].…”

Section: Pi Modelmentioning

confidence: 99%

Design of HTS tri-axial cable in steady-state operation

Takada

Ozcivan

et al. 2010

Physica C: Superconductivity and its Applications

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“…Various high temperature superconducting (HTS) devices are being extensively developed in many countries, such as HTS power cable, superconducting fault current limiter, superconducting transformer, HTS rotating machine and so on, because they have several advantages including extremely low power loss and compactness [1], [2]. High voltage direct current (HVDC) transmission system needs DC reactor that reduces the DC ripple current to prevent it from becoming discontinuous at low power levels and protects the converter valve during a commutation failure [3].…”

Section: Introductionmentioning

confidence: 99%