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Over current characteristic analysis of superconducting model cable using 2G wire 344B
Dae-Won Kim(김대원),A-Rong Kim(김아롱),Jin Geun Kim(김진근),Minwon Park(박민원),In-Keun Yu(유인근),Jeonwook Cho(조전욱),Ki-Deok Sim(심기덕),Seockho Kim(김석호) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
HTS tape is developed for the purpose of being applied to the power cable, motor and generator, etc. The resistance of conventional power cables is not changed a lot by over current condition. But HTS(High temperature superconductor)power cable has some different properties. The impedance of superconductor is changed due to the magnitude of current, temperature, and magnetic field. And the characteristics analysis of HTS power cable under many kind of fault conditions are important to apply real system. In addition the magnitude of over current is 10 times larger than rated current. In this paper, the characteristics of HTS power cable are analyzed when over current flows. Model cable used 2G wires was made and experimented. The results will be helpful to manufacture real HTS power cable.
Quench detection method using a series type thermocouple
김대원(Daewon Kim),김진근(Jin-Geun Kim),김아롱(A-Rong Kim),박민원(Minwon Park),유인근(In-Keun Yu),심기덕(Ki-Deok Sim),김석호(Seockho Kim),조전욱(Jeonwook Cho) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
This paper proposed a quench detection method applied to the HTS (High Temperature Superconducting) wire and the results of the test on a HTS BSCCO (Bismuth Strontium Calcium Copper Oxide) wire were discussed. A series type thermocouple was fabricated for the quench detection. Several thermocouples were welded in series connection, so the series type thermocouple has many detecting points. The temperature variation was detected at each point by using the thermo electromotive force. The feasibility of the proposed method was investigated through the quench detection tests for HTS BSCCO wire. Also, this method has several advantages such as simple structure and cost effectiveness.
Connection algorithm of Real Time Digital Simulator with HTS SMES for power quality improvement
A-Rong Kim(김아롱),Dae-Won Kim(김대원),Gyeong-Hun Kim(김경훈),Jin-Geun Kim(김진근),Minwon Park(박민원),In-Keun Yu(유인근),Kideok Sim(심기덕),SeockHo Kim(김석호),Ki-Chul Seong(성기철) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
Superconducting Magnetic Energy Storage (SMES) system is one of the key technologies to overcome the voltage sag, swell, interruption and frequency fluctuation by fast response speed of current charge and discharge. In order to evaluate the characteristics of over mega joule class grid connected High Temperature Superconducting (HTS) SMES system, the authors proposed an algorithm by which the SMES coil could be connected to the Real Time Digital Simulator (RTDS). Using the proposed algorithm, users can perform the simulation of voltage sag and frequency stabilization with a real SMES coil in real time and easily change the capacity of SMES system as much as they need. To demonstrate the algorithm, real charge and discharge circuit and active load were manufactured and experimented. The results show that the current from real system was well amplified and applied to the current source of simulation circuit in real time.