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Investigation on Effective Operational Temperature of HTS Cable System considering Critical Current and AC loss
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 Title & Authors
Investigation on Effective Operational Temperature of HTS Cable System considering Critical Current and AC loss
Kim, Tae-Min; Yim, Seong-Woo; Sohn, Song-Ho; Lim, Ji-Hyun; Han, Sang-Chul; Ryu, Kyung-Woo; Yang, Hyung-Suk;
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The operational cost for maintaining the superconductivity of high-temperature superconducting (HTS) cables needs to be reduced for feasible operation. It depends on factors such as AC loss and heat transfer from the outside. Effective operation requires design optimization and suitable operational conditions. Generally, it is known that critical currents increase and AC losses decrease as the operational temperature of liquid nitrogen () is lowered. However, the cryo-cooler consumes more power to lower the temperature. To determine the effective operational temperature of the HTS cable while considering the critical current and AC loss, critical currents of the HTS cable conductor were measured under various temperature conditions using sub-cooled by Stirling cryo-cooler. Next, AC losses were measured under the same conditions and their variations were analyzed. We used the results to select suitable operating conditions while considering the cryo-cooler`s power consumption. We then recommended the effective operating temperature for the HTS cable system installed in an actual power grid in KEPCO`s 154/22.9 kV transformer substation.
HTS cable;effective operational temperature;critical current;AC loss;
 Cited by
300 W급 브레이튼 냉동기용 극저온 터보 팽창기 구동축 설계,김만렬;이창형;김동민;양형석;김석호;

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