Terminal device for superconducting cable

The present invention relates to a superconducting cable terminal device. The superconducting cable terminal device for connection between a current lead arranged at a room temperature and a superconducting cable arranged in a cryogenic coolant tank. The superconducting cable terminal device comprises: a connection portion including the current lead and the superconducting cable and formed by connecting the same; a solid insulation bushing formed on the outside of the connection portion; and a refrigerant circulation path connected to the inside from the outside of the solid insulation bushing to form a high voltage insulation path, and supplied with a refrigerant for cooling the connection portion to cool the same by heat exchange so as to form a heat balance portion at a side of the connection portion. The refrigerant circulation path includes an internal connection path connected to the inside from the outside, and a bypass connection path connected with the internal connection path and formed along an inner circumferential surface of the solid insulation bushing. Accordingly, a refrigerant circulation path is formed into an insulation bushing surrounding the connection portion that connects a current lead and a superconducting cable, and the connection portion is cooled in a method of circulating a refrigerant so as to include the connection portion acting as thermal balance points on the inside of the insulation bushing, thereby performing insulation and cooling at the same time. Also, the refrigerant circulation path is formed in a three-dimensional bypass passage form, thereby improving dielectric strength and reducing an overall volume. In addition, since it is possible to directly connect a superconducting cable in a straight line like the existing commercial product, it is easy to replace the existing facilities in terms of form, and thus electricity innovative for use and commercialization of a real power system can be generated. 본 발명은 초전도 케이블 단말장치에 관한 것으로, 상온에 배치되는 전류리드 및 극저온의 냉매조에 배치되는 초전도 케이블 간의 접속을 위한 초전도 케이블 단말장치에 있어서, 상기 전류리드 및 상기 초전도 케이블을 포함하고 상호간에 연결되어 형성되는 연결부와; 상기 연결부 외부에 형성되는 고체절연부싱; 그리고, 상기 고체절연부싱의 외측에서 내측으로 연결형성되어 고전압절연 패스를 형성시키고, 상기 연결부를 냉각시키는 냉매가 공급되어 열교환에 의해 냉각시킴에 의해 연결부측에 열평형부를 형성시키는 냉매순환로;를 포함하여 구성되되, 상기 냉매 순환로는 외부에서 내부로 연결형성되는 내부연결로와, 상기 내부연결로와 연결되고 고체절연부싱의 내부 원주면을 따라 형성되는 우회연결로;가 포함되는 절연내력 향상용 초전도 케이블 단말장치를 기술적 요소로 한다. 이에 따라, 전류리드와 초전도 케이블을 연결하는 연결부를 감싸는 절연 부싱내로 냉매 순환로를 형성시키고 냉매를 순환시키는 방법으로 연결부를 냉각시켜 열 평형점 역할을 하는 연결부를 절연부싱 내부