Transport characteristics of the 100m KEPCO HTS cable system for balanced three-phase currents

Li, Z.Y.; Ma, Y.H.; Choi, B.J.; Ryu, K.; Sohn, S.H.; Hwang, Si-Dole

doi:10.1016/j.physc.2010.05.168

Cited by 8 publications

(3 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In general, the method of the capacitance measurement for the HTS cables is the same with the one of conventional copper cables [5]. The resistance is the equivalent one from AC loss of the HTS cables [6]. And due to unusual structures with the shield in the HTS cables, the inductance measurement method, which has not been suggested all over the world, is quite different from the conventional method.…”

Section: Introductionmentioning

confidence: 99%

Inductance evaluation of a 22.9 kV/50 MVA HTS cable with shield by electrical method

Yao

et al. 2015

2015 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices (ASEMD)

View full text Add to dashboard Cite

In this study, an inductance measurement method by electrical method are originally suggested for a 22.9 kV/50 MVA high temperature superconducting (HTS) cable with a conductor and a shield. Using this method, we experimentally evaluate selfinductances of the conductor and shield, respectively, and also their mutual inductance. To verify the measured data, the self and mutual inductances of the conductor and shield are calculated from finite element method. The main result shows the calculated inductances are in good agreement with measured ones. Therefore, the reliability of the inductance measurement method is confirmed.

show abstract

Section: Introductionmentioning

confidence: 99%

Inductance evaluation of a 22.9 kV/50 MVA HTS cable with shield by electrical method

Yao

et al. 2015

2015 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices (ASEMD)

View full text Add to dashboard Cite

show abstract

“…For large power transmission in a power network, an underground high temperature superconductor (HTS) cable has been considered as a feasible technology: because of its intrinsically higher power density, it can transmit electric power with three to five times the capacity at the same voltage in comparison with a conventional copper cable. Consequently, several HTS cables have been developed, and demonstrated in power grids over the past decade [1][2][3]: we have already operated the two AC 22.9 kV/50 MVA cables installed at Gochang Test Yard and Icheon Substation of the Korea Electric Power Corporation (KEPCO). Moreover, we are also planning to erect two other cables with DC 80 kV and AC 154 kV in 2013 and 2014, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…To elucidate electrical AC loss evaluation of an HTS cable, in this study, first we have measured the total loss of a 100 m BSCCO HTS cable under long-term field operation by calorimetry, especially around a liquid nitrogen temperature of 77 K, which is often used in investigating HTS laboratory samples. Our 100 m cable is usually operated at about 67 K with the power capacity of 22.9 kV and 50 MVA at the Gochang Test Yard of KEPCO [2]. In previous work, we finished testing the AC losses by the electrical method for 5 m cable samples, which are the same as the 100 m HTS cable except length [8].…”

Section: Introductionmentioning

confidence: 99%

Electrical evaluation of the AC losses in a BSCCO cable with an HTS shield

Ryu

Hwang

2013

Supercond. Sci. Technol.

View full text Add to dashboard Cite

In general, a high temperature superconductor (HTS) cable has a conductor and a shield encircling it. This structure causes electrical evaluation of AC loss in the HTS cable to be very difficult. Thus it is not clear yet. Using two voltage leads attached to the conductor and shield, respectively, we evaluated not only their AC loss but also the cable's total loss. To experimentally elucidate our electrical evaluation presented in this work, first we measured the total loss of the 100 m/22.9 kV BSCCO cable by calorimetry, especially around 77 K. Besides the same 5 m cable sample as above, another cable model with a thin insulator was also tested electrically, and they were compared with two numerical models: a non-twisted polygon model and a twisted cylinder model.The results show that, according to the insulator thickness between a conductor and a shield, their magnetic interaction becomes very different. For the 100 and 5 m cables, their normalized total AC losses measured from calorimetry and electrical evaluation correspond well to each other, regardless of operating temperatures. Moreover, the numerical analysis shows that the total AC losses measured for the 5 m sample and cable model fit with the numerically calculated ones. Besides, the conductor's AC losses measured for both the cables agree well with the numerical ones, regardless of their insulator thickness. This is because a conductor in an actual cable is inside a shield, and so does not receive any effect of the shield's magnetic field. These experimental and theoretical results support the view that our electrical evaluation for the total and conductor losses is reliable. However, unlike the results for the total and conductor losses, the shield's experimental loss is not in good agreement with any of the theoretical ones from either the non-twisted polygon model or the twisted cylinder model.

show abstract

Loss Characteristics of the Polygonal YBCO Conductors with a NiW Magnetic Substrate

Ryu

2015

J Supercond Nov Magn

View full text Add to dashboard Cite

Transport characteristics of the 100m KEPCO HTS cable system for balanced three-phase currents

Cited by 8 publications

References 6 publications

Inductance evaluation of a 22.9 kV/50 MVA HTS cable with shield by electrical method

Inductance evaluation of a 22.9 kV/50 MVA HTS cable with shield by electrical method

Electrical evaluation of the AC losses in a BSCCO cable with an HTS shield

Loss Characteristics of the Polygonal YBCO Conductors with a NiW Magnetic Substrate

Contact Info

Product

Resources

About