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RISS 인기검색어
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- 저자 : 백영식(Young-Sik Bak) (검색결과 2 건)
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CD형 초전도케이블의 차폐회로제어에 의한 전력계통 제어기법
이근준(Geun-Joon Lee),이현철(Hyun-Chul Lee),백영식(Young-Sik Bak),양병모(Beoung-Mo Yang) 대한전기학회 2011 대한전기학회 학술대회 논문집 Vol.2011 No.10
Nowaday, HTS(High-Temperature Superconducting) cable makes possible to transfer high density transmission demand in metropolitan area. However, HTS cable application can occur problems such as current flow concentration and large fault current on applied Power System. It should be solve at the plan to Power System. In this paper, the shield circuit of HTS cable is controlled by a thyristor switch and Circuit Braker. This method can be changing current, voltage, fault current because of the reactance of HTS cable. The reactance was calculated each steady state and fault state for stabilization of HTS cable line. The steady state proposed 60% of rated current. The fault state proposed in less than 80% of critical current. To prove the validity of HTS cable simulation, IEEE 14 bus system is used to demonstrate its applicability.
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초전도선재의 열특성을 이용한 초전도케이블의 과도상태에 대한 온도변화 연구
이현철(Hyun-Chul Lee),이근준(Geun-Joon Lee),양병모(Beoung-Mo Yang),백영식(Young-Sik Bak) 대한전기학회 2011 대한전기학회 학술대회 논문집 Vol.2011 No.10
This paper was studied for temperature change under HTS(High-Temperature Superconductor ) cable status(steady-state and fault state) to use thermal characteristics of superconductor tape. Temperature change of HTS power cable was showed that was generated resistance in superconductor tapes. HTS cable was not changed temperature by system current in the steady state that resistance of superconductor tape was nearly zero in the steady-state. However, HTS cable was changed temperature by system current in the transient state that resistance of superconductor tape was sharply increased. This paper deals with the temperature calculation using equivalent thermal network for superconductor tape under HTS cable power system. The thermal equivalent circuit was made up each parts that former, conductor, PPLP, shield, statbilizer. The heat transfer was modeled from conductor to former and PPLP, from shield to PPLP and stabilizer, respectively. The result, HTS cable has showed that temperature difference of 0.44[K] between superconductor tape and fomer part in the steady state. However, HTS cable has showed that temperature difference of 28.90[K] between superconductor tape and fomer part in the fault state. The superconductor tape appeared temperature increase rapidly in fault state under HTS cable. And it could be concider that operating limit and condition according to the HTS cable design.
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