1. R&D for HTS cable and FCL

2. Grid application Program - Outline

Hyun, Ok-Bae

IEA THS ExCo Meeting/18 May 2009, Tampere

AMERICAN SUPERCONDUCTOR RECEIVES WIRE ORDER FOR FIRST SUPERCONDUCTOR POWER CABLE TO BE DEPLOYED IN KOREA’S COMMERCIAL GRID- LS Cable to Manufacture and Install 22.9 Kilovolt Superconductor Power Cable System in Korea Electric Power Corporation’s Grid Near Seoul- World’s Largest Commercial Order for Second Generation Superconductor Wire to be Delivered in 2009; Cable to be Energized by End of 2010 HANNOVER, Germany – April 20, 2009 – American Superconductor Corporation (NASDAQ: AMSC), a leading energy technologies company, today announced at Hannover Fair 2009 that LS Cable Ltd. (LS Cable) has ordered approximately 80,000 meters (50 miles) of 344 superconductors, which is AMSC’s proprietary brand of second generation (2G) high temperature superconductor (HTS) wire. LS Cable will utilize the wire to manufacture a 22.9 kilovolt (kV) cable system that it will install in Korea Electric Power Corporation’s (KEPCO) commercial power delivery network near the city of Seoul in 2010. Founded in 1962 and based in Anyang, South Korea, LS Cable is Korea’s largest power cable manufacturer with nearly 8,200 employees worldwide and annual sales in excess of US$6 billion. This is the single largest commercial order for 2G HTS wire in the world. “With the ability to carry vast amounts of electricity in a small right of way,

Test application of HTS cable and FCL) at the real grid under KETEP - KEPCO program

R&D for HTS cable and FCL

R&D under DAPAS and ETEP program1.Development under 21C Frontier Program, DAPAS

1. 22.9 kV, 1,250 A HTS cable

2. 22.9 kV, 630 A HTS FCL

2.Operation test at KEPCO Gochang Test Center

1. 2 HTS Cable Tests, 22.9 kV, 1,250 A, 3 phases

1. KEPRI – Sumitomo cable

2. LS Cable

3. Each installed and operated at isolated power system

2. 1 HTS FCL, 22.9 kV, 630 A, 3 phases

1. Installed and being operated at an no-load power line

Performance testOperation skillReliability test

Commercial Operation at an real power grid

KEPCO Gochang Test Center

Gochang Test center

Daejeon

• Electrical Operation Characteristics : 22.9 kV, 1250 A, 50 MVAManufactured by Sumitomo Electric

• Physical Characteristics : 100 m long, Cold dielectric Three phase in one cryostat Three in one termination

LS HTS cable

KEPCO HTS cable

KEPCO HTS cable test system

HTS Cable Acceptance Tests have been done

1. Factory Witness Test2. Long Term Rated Load Test - 1250 A rated current was

loaded continuously for approximately 32 days 3. Load Cycle Test

Cryogenic System Response Dielectric Properties During Load Cycle Test

4. Thermal Cycle Test5. History of the Critical Current6. Heat loss dependence on Thermal Cycle Test7. Simulated overload cooling test 8. Unbalanced 3Φ Load Test9. And more

Evaluation of 100 m long 22.9 kV 50 MVA HTS Cable System

HTS Cable and Test by LS Cable

HTS Cable System Cold Dielectric 22.9kV (Nominal), 13.2kV(Phase) 3 Types of cryo-coolers incorporated

for comparison

HTS Cable Diameter : 145mm (Nominal) Aluminum Cryostat PVC Sheath ~ 35kV Insulation level (Nominal) 3 - phases in one cryostat FC Stabilizer incorporated

Physical and electrical layouts

Ground level

Joint box

Tunnel (55 m)

Pipe Duct [15 m]

Termination (Power source)Termination (Load)

Jointbox

U-bend

Termination (Load) Termination (Power source)

On the ground[30 m]

Configuration of system installation

( Fully simulating real grid conditions )

100 m

Configuration and thermal layouts

HTS+Cryostat Fast Switch CLR

Control & Monitoring PartsH 1.2 m × L 2.4 m × H 2.5 m

DevelopmentFabrication and short-circuit test of a SFCL (22.9 kV/630 A 3)Line commutation type, small size and low costSatisfying local requirements (ratings, size, reclosing, limitation time, etc)

item rating

Rated V 25.8 kV

Rated I 630 A

Ic 900 A

Rated withstand V

50 kV, 1 min

HTS recovery < 50 ms

ReclosingLess than 0.1 s, next

event ready

CL 2 Ω

Vacuum Interrupter

15 kV, 1,250 A, 31.5 kA

Cryocooler 220 W at 80K

Operation Temp.

70~72K(T: 0.5K)

Development and operation test of HTS FCL

0 20 40 60 80-10

-5

0

5

10

15

20

CLR: 24.7kArms

Cu

rren

t (k

A)

Time (msec)

Fault current Limited current

R-phase 5kA Fault test at PT&T in LSIS

14kApeak

0 20 40 60 80 100 120 140-40

-30

-20

-10

0

10

20

30

403-phases 10kA Fault test at PT&T in LSIS

Fault current R S T

Limited current R S T

Time (msec)

Cu

rren

t (k

A)

SFCL development and tests

Operation test facility

Test items Content

Short circuit test and protection coordination

1. Short circuit tests2. SFCL - CB – recloser coordination

Long term operation 1. Long term operation, remote control2. Operation assessment, Operation cost, etc

Emergency case 1. Handling emergency2. Bypassing the line in emergency

Load test 1. Short term load test

Maintenance practice 1. Part (HTS, …) replacements2. Cryocooler maintenance w/o bypassing

Operation test – to be done

A project for HTS cable and FCL application in the real grid1. Planned and approved in 20082. Project started by Nov. 2008 (SFCL starts by Nov. 2009)

Project Goal : 1. Grid application of 22.9 kV, 50 MVA HTS cable (500 m)

and 22.9 kV, 630 A SFCL – O & M technology2. 22.9 kV, 150 MVA HTS cable and 22.9 kV, 3,000 A SFCL

Grid application program

Title : Development of O&M Technology for Applying 22.9kV HTS Cables and FCLs to the Commercial Power Grid Sub1 : Power System Analysis for Applying 22.9kV HTS Cables and FCLs to the Commercial Power Grid Sub2 : Development of O&M Technology for Applying 22.9kV HTS Cables to the Commercial Power Grid Sub3 : Development of 22.9kV SFCL Fabrication and Operation Technology for Application to Commercial Power Grids

Period : November 2008 ~ October 2013 (60 Months) Sub3 : Nov. 2010 ~ Oct. 2013 (48 Months)

Fund : 24.28 Billion Won (Government : 12.12 BWon, KEPCO : 8.66 BWon, LSC : 3.50 BWon)

Project Overview

Targets

Phase 1

(Nov.’08 ~

Oct. ‘11)

• 22.9 kV, 50 MVA 500m HTS cable design, fabrication, installation

• Development of O & M Technology for 22.9 kV, 50 MVA, 500m

HTS cable

• 22.9 kV, 630 A SFCL grid application and 22.9 kV, 3,000 A SFCL

design, fabrication and test run

Phase 2

(Nov.’12 ~

Oct. ‘13)

• 22.9 kV, 150 MVA(100m or longer) HTS cable design, fabrication,

installation

• Development of O & M Technology for 22.9kV 150 MVA HTS cable

• 22.9 kV, 3,000 A SFCL real grid application

Project Targets

Prime Contractor

KEPCO HQ

Y. J. Won

Ministry of Knowledge Economy,

MKE

KETEP(Korea Institute of Energy and

Resources Technology Evaluation and Planning)

System Analysis

KEPRI

Co-worked with KERI, CBPC

HTS FCL

KEPRI

Co-worked with LSIS

HTS Cable

KEPRI

Co-funded by LSCCo-worked with LSC,

KERI, CNU, KBSI * LSC: LS Cable Inc. LSIS: LS Industrial Systems Co. KBSI: Korea Basic Science Institute KERI: Korea Electromagnetic Research Institute CNU : Chonnam National University CBPC : Chungbuk Province Colledge

Project Team

[Location of HTS cables]

154/22.9kV MTR

DS

CB

load load load

HTS Cable 500m

HTS Cable 500m

HTS Cable 500m

HTS cable installation schemes - proposed

D/L

154/22.9 kV M.Tr

SFCL

SFCL 3,000 A SFCL

630 A SFCL

DSCB

D/LD/L

SFCL installation scheme

HTS Cable1. AMSC 2G wire (AMSC 344) by October 2009

The largest contract of 2G wireTo be delivered till October 2009

2. HTS cable systemCable system to be completed by DecemberTo be installed in 2010

SFCL1. Operation test will continue through 20102. SFCL system (upgraded) to be completed by upper half

of 2010, and to be installed by the end of 2010

Installation by 2010

Icheon

Incheon

Seoul

Icheon S/S

Icheon substation

이천 변전소

Simulated duct on a breast wall

slope

On the ground

Manhole, joing box (on the surface)

Duct

열거동 관측지점(Off-Set)

Terminals2 Sets

Cooling & Control

On the ground

Cable layout – One of the 3 proposals

1

A underground feeder surfaced to connect the SFCL near the fence

SFCL layout - A proposal

22.9 kV HTS cable and SFCL have been developed and operation-

tested

Real grid application and test-commercial operation of

1. 22.9 kV 50 MVA (500 m) HTS cable

2. 22.9 kV, 630 A and 3,000 A SFCL

3. To be installed in 2010 in Icheon S/S

Summary

Demand for 22.9 kV line protection – SFCL proposed

KEPCO is seeking a solution to control the increased fault current associated with the system upgrade in the 22.9 kV grid

1. BackgroundIncreased power demandUpgrade the 154/22.9 kV substationsReplace the 154 kV/22.9 kV MTR 60 MVA 100 MVA

2. ProblemIncreased fault current at the 22.9 kV sideFault current > the Max. allowed value

• Search a solutionUpgrade all feeders, %Z increase, … : No!

• SFCL proposed at MTR 22.9 kV sideCost effectiveSimple procedures

For MTR protection or bus-bar connectionIrated 3 kA, To be developed

Y∆ MTR

154 kV/22.9 kV100 MVA

Y∆

SFCL

CB

For feeder protection