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Think Green, Triple Sales IEA HTS ExCo, May 2010, Stockholm, Sweden Ok-Bae Hyun/KEPCO IEA HTS Programme ExCo meeting 20-21 May 2010, Stockholm, Sweden.

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Presentation on theme: "Think Green, Triple Sales IEA HTS ExCo, May 2010, Stockholm, Sweden Ok-Bae Hyun/KEPCO IEA HTS Programme ExCo meeting 20-21 May 2010, Stockholm, Sweden."— Presentation transcript:

1 Think Green, Triple Sales IEA HTS ExCo, May 2010, Stockholm, Sweden Ok-Bae Hyun/KEPCO IEA HTS Programme ExCo meeting May 2010, Stockholm, Sweden

2 Think Green, Triple Sales S U NAM High Throughput Process Commercialization of CC ~ km-L, 4mm-w Commercialization of CC ~ km-L, 4mm-w R&D status of HTS CC

3 Think Green, Triple Sales IEA HTS ExCo, May 2010, Stockholm, Sweden Fabrication processes for each layer Layer Typical Thickness R&D (KERI/SuNAM)Pilot line (SuNAM) ProcessSpeedProcessSpeed Cu~ 20 μm Electro- plating 240 m/h Electro- plating 300 ~ 600 m/h Ag2~ 3 μmSputt.10 m/hSputt.360 m/h SmBCO (GdBCO) ~ 2 μmEDDC100 m/hR2R RCE600 m/h LMO~ 20 μmPLD50 m/hSputt. 360 m/h Epi-MgO~ 50 nmEvap.70 m/hEvap. Textured-MgO~ 10 nmIBAD600 m/hIBAD Y2O3Y2O3 ~ 7 nm Evap. 500 m/h Evap.600 m/h Al 2 O 3 ~ 50 nm200 m/h Hastelloy~ 70 μm Electro- polishing 90 m/h Electro- polishing 720 m/h EDDC : Evaporation using Drum in Dual Chamber (Batch type RCE) Evap. : Evaporation with e-beam. Production speed is 4 mm wide equivalent

4 Think Green, Triple Sales IEA HTS ExCo, May 2010, Stockholm, Sweden 100m Cu Ba Sm Compositional ratio. Fabrication of 100 m long- SmBCO CC by IBAD- EDDC (KERI) 100 m Differential pumping Buffered Substrate O2O2 Halogen heater ~15 mTorr SmBCO ~10 -5 Torr Cryo Pump TMP Sm (S G) Ba (L G)Cu (L G)

5 Think Green, Triple Sales IEA HTS ExCo, May 2010, Stockholm, Sweden 2008 CC : High Ic was obtained but many critical defects were existed CC : Ic was enhanced and the number of critical defects was reduced. Ic was decreased but its uniformity was improved in 60 m long section Short tape m 638 m Long tape 325 m 187 m Ic x L6,500 Am12,716 Am Ic properties of EDDC – SmBCCO CCs

6 Think Green, Triple Sales IEA HTS ExCo, May 2010, Stockholm, Sweden Jc-B-Θ property of EDDC - SmBCO CCs Normalized magnetic field(H//c) dependence of critical current density( J c ) Jc-B property of EDDC-SmBCO was found to be superior compared with commercial YBCO EDDC-SmBCO without any doping shows c-axis flux pinning effect but its relationship with microstructure is not clear.

7 Think Green, Triple Sales IEA HTS ExCo, May 2010, Stockholm, Sweden PIDAC V ref (Critical voltage criterion) Current for P/S to HTS conductor K*V 1/n + V:measure voltage P/S current reference critical current (Linearization of the control voltage) Current lead - HTS conductor Motor & tension control Voltage tap Current tap Conventional R2R Transport Mes.Conventional R2R hall sensor Mes. Current control to keep the measured voltage as critical voltage criterion Reel to reel system & DSP control / High speed Ic meas. > 400 m/h

8 Think Green, Triple Sales IEA HTS ExCo, May 2010, Stockholm, Sweden Applied magnetic field CC tape Super current flow Cross sectional view X Z Y I+I+ I-I- Define A= line integration of magnetic field of left loop B= line integration of magnetic field of right loop Using Ampere law New non-contact type Ic measurement system From the scanning magnetic field, I c = 78.2 A From the conventional 4 probe method Ic= 84 A The deviation is caused by the noise of data I+I+ I-I- Noise Gap(between hall sensor and superconducting layer) dependency of Ic is smaller for new system Calibration point

9 Think Green, Triple Sales IEA HTS ExCo, May 2010, Stockholm, Sweden In-plane texture of buffer layers Multi-turn IBAD system with max. spool size ~ 2 km. of MgO (220) in production : 7 ~ 8 o. IBAD-MgO Homo-epi MgO Properties of IBAD template (SuNAM) S U NAM

10 Think Green, Triple Sales IEA HTS ExCo, May 2010, Stockholm, Sweden computer Feedback program E-gun (30 KW) 29 Multi-turn R2R QCM Metal tape Y, Sm CuBa Use of inexpensive metal source. High rate deposition ( > 10 nm/sec) Process speed : < ~ 600 m/hr. Optimization underway. Heater Source for metal evaporation : 30 kw pierce e-gun Substrate transportation : Multi-turn R2R system, more than 20 turns R2R – RCE system by SuNAM S U NAM

11 Think Green, Triple Sales IEA HTS ExCo, May 2010, Stockholm, Sweden Min. Ic : 265 A/cm-w L : 120 m Min Ic : 220 A/cm-w Ave Ic : 298 A/cm-w Max Ic : 340 A/cm-w Min Ic : 220 A/cm-w Ave Ic : 298 A/cm-w Max Ic : 340 A/cm-w Measured by HSTM V-V distance : 60 cm Measured by HSTM V-V distance : 60 cm GdBCO Surface after annealing Ic properties of GdBCCO CCs by R2R-RCE S U NAM

12 Think Green, Triple Sales IEA HTS ExCo, May 2010, Stockholm, Sweden High Critical Current GdBCO CCs by R2R-RCE S U NAM

13 Think Green, Triple Sales IEA HTS ExCo, May 2010, Stockholm, Sweden Ic of 637 A/cm was achieved for 3 μm-thick EDDC-SmBCO CC. But, critical defects due to de-lamination were observed for long CC tapes. High performance Ic measurement systems were developed. New hall sensor measurement system using Ampere law High speed transport measurement (HSTM)system R2R Pilot line for the production of CC was installed in SuNAM Co. De-lamination problem was resolved for R2R-RCE CCs R2R-RCE process for high & uniform Ic of GdBCO CCs was established Min. Ic of 220 A/cm-w at 77 K for 200 m-long CC Highest Ic of 510 A/cm-w at 77 K for short sample REBCO CCs by EDC and R2R-RCE

14 Think Green, Triple Sales IEA HTS ExCo, May 2010, Stockholm, Sweden Development of HTS Cable 22.9kV 50MVA 154kV 1GVAAccessory ** DAPAS : Development of Advanced Power system by Applied Superconductivity tech.) 22.9kV 22.9kV 50MVA - Location : KEPCOs I-cheon Substation - Development : 2008 ~ Length : 500m - Accessory : 2 Termination, 1 Joint, Cooling system - Equal to 5 circuit of Cu cable 154kV 154kV 1GVA - Type test, 2010 (Gochang Power Testing Center) - PQ test, Real grid application : 2012 ~ - Equal to 6-8 circuit of Cu cable HTS Cable of LS Cable DAPAS Project in Korea - Project period : 2001~ Total budget : $146million (Gov. : $100million / Industry : $46million) - Participant : LS Cable, KEPCO, KERI HTS Cable by LS Cable

15 Think Green, Triple Sales IEA HTS ExCo, May 2010, Stockholm, Sweden Milestone st Phase2nd Phase Fundamental Design Single Core 30m 50MVA/30m 3-Core 50MVA/100m 3-Core Fab. Evaluation. 1,000MVA rd Phase Evaluation Type test 22.9kV 50MVA, 500m Real-grid application (I-cheon Substation) DAPAS (MEST) Year 154kV 22.9kV NEW Project (MKE) Application Type Test PQ Test 22.9kV HTS Cable has been developed and new project deploying on Real-Grid started. 154kV 1GW HTS power cable is under development till (Type Test) / 2011 (PQ Test) HTS Cable by LS Cable - milestone

16 Think Green, Triple Sales IEA HTS ExCo, May 2010, Stockholm, Sweden Cooling SystemTermination 3-Core HTS Cable HTS cable application – 22.9 kV, 500 m

17 Think Green, Triple Sales IEA HTS ExCo, May 2010, Stockholm, Sweden 22.9kV, 50MVA, 500m HTS Cable layout (Ichon SS) Splicing Termination HTS cable (Underground part) Cryogenic system 154/22.9kV M.TR (#5) DS CB HTS Cable 500m 50MVA HTS cable HTS cable circuit HTS cable operation by KEPCO 22.9kV, 50MVA, Real Grid Project Route length : 500m Location : KEPCOs I-cheon substation Installation & Commissioning : 2010 Operation : 2011 ~

18 Think Green, Triple Sales IEA HTS ExCo, May 2010, Stockholm, Sweden 154kV 1GVA - Type test, 2010 (Gochang Power Testing Center) - PQ test, Real grid application : 2012 ~ - Equal to 6-8 circuit of Cu cable - World best power transmission performance acquisition (1GVA) A 154kV 1GVA HTS termination was designed, manufactured, and successfully tested in accordance with IEC Extra DC voltage test was performed successfully 154 kV HTS cable

19 Think Green, Triple Sales IEA HTS ExCo, May 2010, Stockholm, Sweden Test ItemTest RequirementResult AC Voltage test with LN2 Level Level 1 (General Point) -Interface at Upper of Spacer AC225kV/15minPass Imp.±750kV /10times Pass Imp.±800kV /3times Pass Imp.±850kV /3times Pass Imp.±900kV /3times Pass AC225kV/15minPass Level 2 (Weak Point) -Interface at Middle of Spacer AC225kV/15minPass Imp.±750kV /10times Pass AC225kV/15minPass DC Voltage test Level 1 (General Point) DC 220kV/10minPass DC300kV/10minPass Withstand Voltage Test (14 kV Termination)

20 Think Green, Triple Sales IEA HTS ExCo, May 2010, Stockholm, Sweden HTS Reactor S/W HTS Reactor/Limiter VI SB DC HTS Power fuse Reactor/Limiter VI SB DC HTS Superconductor HTS + SW Hybrid (1/2 Hz limiting) Hybrid (1/2 Hz non-limiting) PCL Hybrid Possibly useful at medium voltages Hybrid SFCL - evolution Peak current limitation ?

21 Think Green, Triple Sales IEA HTS ExCo, May 2010, Stockholm, Sweden 14kV/12.5kArms, 1 phase fault test step 1 : fast fault detection step 2 : triggering mechanical fast switch immediately through the controller, by a capacitor bank energy step 3 : initiating to open and generate arcing of the contact at the same time step 4: interruption of main circuit when current become zero step 5 : commuted to parallel current limiting resistor Fast switch enabling a FCL

22 Think Green, Triple Sales IEA HTS ExCo, May 2010, Stockholm, Sweden Concept of the PC-FCL Peak control(mode-1)Type 2(mode-2)Mode 1+2 Double line commutations 2 stage current limitation S1 to limit the fault current for the first ½ cycle upon fault S2 to limit the fault current after the first ½ cycle Reducing the voltage stress of the S1 switch through a parallel resistor FCL – Peak current limiting type

23 Think Green, Triple Sales IEA HTS ExCo, May 2010, Stockholm, Sweden Real circuit for the PC-FCL Simulated wave Use one or multiple module of an IGBT and a resistor in parallel Peak current controlled FCL by semiconductor SWs

24 Think Green, Triple Sales IEA HTS ExCo, May 2010, Stockholm, Sweden CT Rogowski coil Fast fault detector controller Driver (S1) Solid state module (S2) Mechanical fast switch CLR PCR 14kV/12.5kArms, 1 phase fault test Peak current controlled FCL


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