The Research Progress Concerning the

Research Progress Concerning

the Application of HTS cable system

on Power Grid in Korea

LS Cable & System

HTS System Business Team

Cheol-hwi Ryu, Ph.D.

Oct. 11, 2011

Development of HTS Cable in Korea► R/D program in Korea

► Overview of LS CNS Status

Demonstration of 22.9kV/50MVA HTS Cable System

Developing Progress of 154kV/1GVA HTS Cable System

Future Plan

’01 ’02 ’03 ’04 ’05 ’06 ’07 ’08 ’09 ’10 ’11 ’12 ’13 ’14 ’15 ’16

Developing

22.9kV

/50MVA

30m (1-Φ)

Carrying out

Int’l Certification &

Long-term Test

22.9kV/50MVA

100m

Progressed

154kV/1GVA

100m

MOST1)

Developing

22.9kV

/50MVA

30m (3-Φ)

Demonstration

in Actual Grid

Actual Grid

(ICHEON S/S)

22.9kV/50MVA

500m

Actual Grid

(ICHEON S/S)

22.9kV/150MVA

100m

Actual Grid

(JEJU Island)

DC 80kV/500mBasic

R/D for

DC

200kV

MKE2)

Developing

DC 200kV/5GW

Demonstration

in Actual Grid

Actual Grid

(JEJU Island)

154kV/500MVA 1km

DAPAS3) Program

Commercial

Target1)MOST: Ministry Of Science & Technology2)MKE: Ministry of Knowledge & Economy3)DAPAS: Development of Advanced Power System by Applied Superconductivity Technologies

Pilot

Project

4/Page

AC

22.9kV

▪ 50MVA Completing Commissioning & Ongoing Demonstration in 2011

▪ 150MVA Ongoing Development & Demonstration till 2013

154kV

▪ 1GVA Completing Development & Long term Test in 2011

▪ 500MVA Ongoing Development & Demonstration from 2011

DC

80kV

▪ 500MW Ongoing Development from 2011

200kV

▪ 5GW Completing Basic R/D in 2011

Planning Development and PQ test till 2015

via National and In-house Projects

Development of HTS Cable in Korea


Contents

Demonstration of 22.9kV/50MVA HTS Cable System► Components

► Installation

► Operation

Future Plan

6/Page

1

2

3

4

5

22.9kV/50MVA HTS Cable

Termination

Joint

Cooling System

Offset System

12345

Air view of HTS Cable System in Icheon S/S

Bending point: total 9 with 90° bending angle

7/Page

KEPCO Icheon Substation

Electrical Characteristics

- Nominal Voltage: 22.9kV

- Rated Current: 1.25kA

Physical Characteristics

- Cable Length: ~ 500m

- Cold Dielectric Design

- 3 phases in One Cryostat

- HTS wire: YBCO Coated Conductor

Hardware

- 300m and 200m HTS Cable

- Outdoor Termination (3-Φ in 1 Cryostat)

- Joint bay (3-Φ in 1 Cryostat)

Installation/Commissioning: July 2011

Grid Application: Aug. 19, 2011

Overview of HTS Cable System in Icheon S/S

8/Page

HTS Cable

SIS GISA D/L

B D/L

C D/L

D D/L

GIS22.9kV CNCO

600mm2 2cct

22.9kV CNCO

600mm2 2cct

Sequence Trip Signal Transmission

154kV/22.9kV

System Interconnection

E D/L

9/Page

Pitch Determination

for Each Layer

Impedance Matching

(2G wire)

EM field Calculation

Fabrication

HTS Shield

HTS Conductor

Optimal Design for Conductor/Shield Stranding & Fabrication

HTS Cable

Vacuum

Tcold= 77KThot= 300K

SpacerOuter layer

Inner layer

HTS Cable

Cryostat Displacement Simulation

Introduction of Seamless Aluminum Cryostat for HTS Cable

10/Page

HTS Cable

11/Page

Test Details Result

22.9kV 50MAVA HTS Cable 30m

Proto type test (2005)

- Long term test (load cycle test) Pass

- Long term test (cool down test) Pass

- DC critical current Pass

- Withstand voltage test Pass

- AC loss measurement Pass

- Summary of the test results

22.9kV 50MVA HTS Cable 100m

type test (2007)

- Load cycle (cooling circuit and Cryostat pressure

check)Pass

- Thermal cycle (shrinkage of cable) Pass

- Dielectric loss factor (Tan δ) Pass

- Dielectric security Pass

- Partial discharge Pass

- DC critical current Pass

- Visual inspection of HTS cable sample Pass

- Cable bending test Pass

HTS Cable

Type Test on previous proto-type of 22.9kV/50MVA

12/Page

Design

- Cold Dielectric

- Outer Diameter: 145mm

- Seamless Al Cryostat

- PVC Sheath

- Insulation Level up to 35kV Grade

Coverable range: 13.2kV ~ 35kV

- 3-core type Seamless Al Cryostat

- Fault Current Pass with Stabilizer

Characteristics

Specification

- 22.9kV (Nominal), 13.2kV (Phase)

- 1,260A (50MVA)

- Short Circuit Rating: 25kA/30cycle (Cu Stabilizer)

- Application of Cryogenic System (Forced Circulation Method)

HTS Cable

13/Page

Manufacturing

HTS Cable

Stranding of

Former

Former is wound up

using stranding

machine. The

diameter and the

surface of former

should be controlled

precisely to make

even and uniform

shape of HTS wires

Wrapping &

Cushion Layer

Stainless steel and

carbon paper tapes

shall be wound to

bind the former

according to the

designed diameter

Stranding of HTS &

Conductor Screen

HTS wires and LPP

papers shall be

wound over the

cushion layer, which

will be controlled

together using

stranding machine

modified for HTS

cable

Electric Insulation

& Insulation Screen

During the lapping of

LPP papers, tension

shall be carefully

controlled for

insulation quality and

bending characteristic

Inner Cryostat

The height and pitch

of corrugated Al

cryostat is critical to


Vacuum

Conditioning

The vacuum region

between inner and

outer cryostat of the

cable shall be

subjected to vacuum

pumping for at least

30 days at a

temperature of 30℃

MLI Taping

After cleaning the

surface of inner

cryostat, MLI is

wrapped and 4 Teflon

spacers shall be

stranded on the

surface of MLI

Outer Cryostat

The height and pitch

of corrugated Al

cryostat is critical to


Outer Jacket

During the extrusion,

cable diameter is

measured by X-ray

scan

14/Page

Joint Box

Compact Design

(500mm Ø, 3.5m L)

Insulation Level up to 35kV Grade

Coverable range: 13.2kV ~ 35kV

Pre-fabricated components

Pressure withstand: Min. 15bar

Termination

Compact Design

3-Φ in one cryostat (22.9kV)

Pressure withstand: Min. 15bar

Pre-fabricated components

Polymer composite Bushing

Pre-fabricated

•Jointing at site

Pre-fabricated

Termination & Joint

15/Page

Buffer for balancing System pressure

and fault current

Evaporating

Latent Heat Type

Overview

Cooling system

Open-loop type using Decompression unit

Capacity: 6.5kW

16/Page

Item Specification

Operating

Condition

Inlet Temp. of Cable 69K

Inlet Temp. of Cable 73K

Circulation Flow rate of LN2 0.5kg/s

Pressure 3barG ~ 7.5barG

Fault Current 25kA, 30cycles

Heat Load

Cable & Termination 4100W

Cooling System 1010W

Difference of

Pressure

Cable & Termination 1.4bar

Cooling System 1.1bar

Specification

Cooling system

17/Page

Component Function View

Decompression

Pump

Vacuum pump :

Dropping the

pressure of Sub-

cooler

Evaporator:

Increasing temp. of

GN2 flowing in the

vacuum pump

Heat

Exchanger Supercooling LN2

Circulation

Pump Circulating LN2

Sensor

Thermometer

Pressure sensor

Flow sensor

Vacuum sensor

Component Function View

Reservoir

Storage of LN2

Start point of LN2

circulation

Buffer for balancing

system pressure &

fault current

Circulation

Unit

Bulit-in circulation

pump & flowmeter

Decompression

Cryostat

Cooling LN2 by

evaporating latent

heat

Valve Box

Valves

for open and close of

decompression

cryostat

Valve

Open and close of

LN2 flow

Flow control of LN2

Components

Cooling system

http://www.lakeshore.com/temp/sen/sd670_po.html

Evaluating Unmanned Operation System for Cooling System

No. Item Specification

1 MS(Master Station) • Notifying Alarm and trip to the SCADA and User by E-mail and SMS.

2 CS(Control System) • Communicating with REM, DUM and Cryogenic Refrigerant by profibus

3 REM(Reservoir Module)• Controlling Reservoir Module Independently by PLC.

• controlled by CS and Communicating with CS.

• DUM and Cryogenic Refrigerant: Operated by the Temp.of the HTS Cable.4 DUM(Decompression Unit Module)

5 Cryogenic Refrigerant

6 LTS(Load Termination System)

• Explosion-proof type(IP 55)

• Controlled by CS and Communication with CS.7 JBS(Joint Box System)

8 STS(Source Termination System)

LTS JTS STS REM PLC

DUM PLC

Control Net ProfiBus

Ethernet

HMI (Server PC) HMI (Client PC)Local Network

UserDate Acquisition

Input

Control ValueMS

PLC duplex configuration

(watchdog, quick change when Failed)

Control system

Level Action countermeasure

3 Engineers standby within 24hrs Sending SMS to people in charge

2Alarming for observation to decide cutting power or not

Engineers standby within 5hrs & Clearing alarms after measures

Informing to 2nd line of SCADA

Sending SMS to people in charge

1 Stopping the operation: Cutting powerInforming to 1st line of SCADA

Sending SMS to people in charge

Action Plan According to Fault Level

Condition for Deciding Faults

Step Level Deciding Faults SetupMaintaining

Time

1

1

Breakdown Fulfilling conditions: Inner pressure of Reservoir & Load-side termination Under 2barG 10sec.

2 Fire Installing the fire alarm in Cooling room and Joint room

3 Explosion &

Damage of

HTS wire

Fulfilling conditions: Inlet temp. of cable (2 points), Joint (2 points) Over 75K 10sec.

4 Fulfilling conditions: Pressure of outlet of circulation pump & source-side termination Over 6.5bar G 0.5sec.

5

2

Breakdown Fulfilling conditions: Inner pressure of Reservoir & Load-side termination Under 2.5barG 10sec.

6 Explosion &

Damage of

HTS wire

Fulfilling conditions: Inlet & Outlet temp. of cable (4 points), Joint (2 points) Over 73K 20sec.

7Fulfilling conditions: Pressure of outlet of circulation pump & Source-side

terminationOver 6bar G 5sec.

8

Maintaining

Cooling

system

Flow rates of LN2 Under 0.2kg/s 10sec.

9 Fulfilling conditions: Vacuum condition of cable, joint & termination Over 0.1torr 10sec.

10 Fulfilling conditions: Inner pressure of pneumatic tank Under 4.2bar 10sec.

11 Fulfilling conditions: Level of LN2 tank Under 15% 10sec.

12 3Whole

systemInforming people in charge after checking malfunction or abnormality of all sensors

Control system

Item Standard Spec. Result

1 DC Voltage Test (Jacket) IEC 60840 10kV for 1min. Pass

2 Heat Loss Measurement LS Standard 3.5W/m Pass

3 DC IC Measurement KS C 6111-6 3.27kA@70K Pass

4 AC loss Measurement LS Standard 1.25W/m/Phase Pass

5 DC Voltage Test KEPCO Standard 46kV for 10min. Pass

6 Visual Inspection LS Standard Drawing Pass

Test Results

the world’s first experience to measure AC loss at rated current (1,250A)

in actual power grid

21/Page

trend of Load Current vs. quantity of Heat Capacity

1-day trend during Increasing

Load Current to 600A

50 days trend from starting

demonstration

Starting Demonstration: Aug. 19, 2011

- Load current: 300A (connected to 2 D/L)

Increasing Load Current: Oct. 6, 2011

- Present load current: 600A ~700A (connected to 5 D/L for full load)

At peak time (winter), it will be up to 1,250A.

Momentary build-

up due to loop

current at

connecting 5 D/L

Heat load@600~700A

2kW

Oct. 6 Oct. 7 Aug. 19 Oct. 9

22/Page




► Criteria of HTS Cable & Cryogenic System

► Cryogenic Termination

Future Plan

23/Page

Outer Cryostat

Former/Stabilizer

HTS Phase Conductor

Insulation

HTS Shield

LN2

Inner Cryostat

Thermal Insulation

(MLI + Vacuum)

Rated Voltage: 154kV, (U0=89kV, Um=170kV)

Rated Current: 3.75kArms (5.3kApeak)

BIL: 750kV

Design Fault Current: [email protected]

Electrical Characteristics

Cold Dielectric Design

Single Phase in One Aluminum Cryostat

Physical Characteristics

2 Stirling type Cryo-cooler (650W@65K)

Subcooled LN2 is circulated by a pump.

Cryogenic Cooling System

1 Cycle

Voltage

105kV : 1.2U0

16h (No Load)

8h (Load)

Vo

ltage &

Cu

rren

t

Time (h)

Load Cycle Test at 1.2Uo for 40 days was successfully finished.

.consttV n

Load cycle test: 1.3Uo x 30cycles

Vtest =105kV(1.2Uo), 40cycles

30/1)60/36530(tk = 1.189

Load Cycle Test

PD & AC Dielectric Security [email protected] for 30 min. were tested successfully

30/1)30/602436530(tk 5.1 @ 30 min

Vtest = 1.5Uo (133.5kV), 30min

AC Dielectric Security Test

• Applied Voltage: 1.5 Uo

• Testing Frequency: 18.0MHz

• PD < 5pC

[PD@Uo] [[email protected]]

PD Test

AC Dielectric Security & PD Test

DC Ic@70K 100m System with termination

Current [A]

Target DC Current@70K > 7,000A

Estimate the DC Ic of Cable system@70K: 8,985A

5760A

Average Ic/tape = 104.7A

DC Ic@77K, 2m cable

Confirm the DC Ic of Cable with terminations

DC Ic Measurement

27/Page


Future Plan► Development & Demonstration of Transmission Level

HTS Cable System



28/Page

Title: Development & Demonstration of Transmission level HTS Cable System

Period: July, 2011 ~ June, 2016 (60months)

Supervision: KEPCO

Participant: LS CNS, KERI & Several Universities

Research Funds: USD70M (Government: USD22M , KEPCO: USD18M, LS CNS: USD30M)

Summary

○ Development of SFCL

○ Performance Evaluation &

Installation in Grid

○ Development of the Method

for O&M

○ Development of HTS Cable

○ Installation & Operation in Grid

○ Localization of HTS Cable &

Cryogenic System

○ Finding the way of institutional support for commercialization

○ Selecting the site for demonstration

○ Review of Standard for product & test

Supervision (KEPCO]

○ Grid Analysis & Relevant effect

○ Grid Operation System

○ Verification of HTS Cable

Participant 1 (KEPRI) Participant 2 (LS CNS) Participant (KEPRI)

Composition & Aim of Project

29/Page

Overview of Pilot Application

Hanlim

S/S

Hanlim C/S

(80kV,60MW)

154kV West Jeju- Hanlim T/L

#2 HVDC (2011)

(±250kV,400MW)

Anduk

S/S

West Jeju

MainlandNew Town

in Jeju

154kV Hanlim-Anduk T/L

GumAk C/S

(80kV,60MW)

154kV West Jeju –Anduk T/L

HTS-DC 80kV

(0.5km, 2013)

XLPE-DC 80kV

(0.5km, 2011)

HTS-AC 154kV

(1.0km, 2014)

: XLPE-DC

: HTS-DC

: HTS-AC

Documents

The Research Progress Concerning the