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Republic of Korea Power System 1

The Electric Power System

- Republic of Korea -

Republic of Korea Power System 2

Basic facts

Area : 49,720㎢ Population : 51,465,228(2014)

Number of electricity consumers : 21,209 thousand Number of TO(Transmission Owner) : 1(KEPCO) Number of ISO : 1(KPX) Number of DSO : 1(KEPCO) Peak load : 77,295(2014)

Average interruption of electricity : 10.9 min(2014)

2

Republic of Korea Power System 3

Global map of the gridand of its interconnections

3

Interconnectors with: No interconnection between

other countrys

Daegu

Sin-Okcheon

Jeju T/P

Yangju

Seo-Incheon

Hanrim CC

Namjeju

Seo-Incheon C/C

Incheon T/P, C/CSin-Incheon

Sin-Sihung

Sin-Bupyung

Sin-Dukheun

Chungbu

Youngseo

Dong-Seoul

Uijeongbu

Sungdong Migum

Sin-suwonPyungtaek T/P, C/C

Ansan

Sin-Dangjin

Dangjin T/P

Taean T/P

Sin-onyang

Boryeong T/P, C/C Chungyang

Gunsan

Sin-Gimje

Youngwang N/P

Sin-Gwangju

Sin-Hwasun

Sin-GangjinHaenam C/S

Yeosu N/P

Gwangyang SteelGwangyangHadong T/P

Sin-Namwon

Euiryong

Sincheong P/PMuju P/P

Sinkaedong

Chungwon

Sin-Jincheon

Sin-GosungSamcheonpo T/P

Sin-Masan

Bukbusan

Pusan C/CNam-Pusan

Sin-YangsanKori N/P

Sin-OnsanUlsan TP, C/C

Wolseong N/P

Buk-Daegu

Sunsan

Goryeong

Sin-KyeongsanUljuSin-Ulsan

Sin-Youngju

Sin-Youngil

Cheongsong P/P

Uljin N/P

Donghae

Yangyang P/P

Sin-Jecheon

Sin-Gapyung

Sin-Ansung

Sin-Yangje

Sin-Ansan

Sin-Taebaek

Gwangyang C/C

ShinPohang

Sin-Gimhae

Hwasung

Sin-Sungnam

GonjiamSeo-seoul

Sin-Youngin

Youngdeungpo

Sin-seosan

Seo-Daegu

Republic of Korea Power System 4

Grid facts and characteristics4

The electricity grid in Korea is sub-divided into transmission grids (EHV,HV, DC) and distribution grids (medium and low voltage)

Voltage Level Total length ResponsibilityExtra High Voltage 765kV 1,014 km KPXExtra High Voltage 345 kV 9,369 km KPX

High Voltage 154 kV 22,440 km KPX

Medium Voltage 66kV 144 km KEPCOLow Voltage 22.9kV 452,572 km KEPCO

Voltage Level Total length ResponsibilityDC 180kV 231 km KPX

Republic of Korea Power System 5

Structure of electrical power system5

765 kV

345 kV

154 kV

22.9 kV

220 V

Industry

Households

Bulk-Industry

Dispersed Generation

Conventional Generation

Industry

Industry

Republic of Korea Power System 6

Map of the high voltage grid6

1960’s Present

Republic of Korea Power System 7

Information on ISO, TO & DSO

Name : KEPCO, KPX Network length (km) : 485,770 Served area (km²) : 49,720 website: http://www.kepco.co.kr,

http://www.kpx.or.kr

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Republic of Korea Power System 8

Cooperation of ISO, TO and DSO

Transmission System ISO builds transmission operations planning TO implements the planning built by ISO

DSO(KEPCO) DSO builds distribution operations planning and

implements the planning

8

Republic of Korea Power System 9

Responsibilities of ISO, TO and DSO9

ISO(KPX) Responsible for maintaining the generation and the

transmission system reliabilities

TO(KEPCO) Responsible for maintain the transmission asset

DSO(KEPCO) Responsible for distribution system qualities

Republic of Korea Power System 10

Power structure of the country10

Republic of Korea Power System 11

Installed capacity withreference to primary resources

Installed capacities (MW), 2014

11

0 5000 10000 15000 20000 25000 30000

Others

Biomass

Wind

Solar

Oil

Nuclear

Coal

Gas

11335

137

604

1791

3850

20716

26274

26742

Republic of Korea Power System 12

Energy production withreference to primary ressources Electricity generated (TWh), year

12

2,6

8,3

1,1

2,1

25

156,4

203,4

114,7

0 50 100 150 200 250

Others

Biomass

Wind

Solar

Oil

Nuclear

Coal

Gas

Republic of Korea Power System 13

Development of generation capacity since 2009

13

0,0%

5,0%

10,0%

15,0%

20,0%

25,0%

30,0%

35,0%

2009 2010 2011 2012 2013 2014

Renewables

Hydro

Coal

Nuclear

Gas

Oil

Republic of Korea Power System 14

Comsuption14

households13%

other21%

public institutions2%

industry57%

agriculture3%

streetlight1%

midnight3%

Power comsuption by consumer groups, 2014

Republic of Korea Power System 15

Location of renewableenergy sources

15

operationplanned

Republic of Korea Power System 16

Development of wind power16

-

31 30

70

78

49

346 377

407

477

555

604

-

10

20

30

40

50

60

70

80

90

-

100

200

300

400

500

600

700

2009 2010 2011 2012 2013 2014

Development ofCapacityAccummulatedcapacity

Republic of Korea Power System 17

Development of photovoltaic power

17

-

94

44

135

390

711

417 511 555

690

1 080

1 791

-

100

200

300

400

500

600

700

800

-

200

400

600

800

1 000

1 200

1 400

1 600

1 800

2 000

2009 2010 2011 2012 2013 2014

Development ofCapacityAccummulatedcapacity

Republic of Korea Power System 18

RES installed capacity and production since …

18

-

500

1 000

1 500

2 000

2 500

3 000

3 500

4 000

4 500

5 000

0

2 000

4 000

6 000

8 000

10 000

12 000

14 000

16 000

2 009 2010 2011 2012 2013 2 014

RES generation Y[GWh]

Installed capacity[MW]

GWh MW

Republic of Korea Power System 19

Price development for industry consumers

19

0,00

1,00

2,00

3,00

4,00

5,00

6,00

7,00

8,00

9,00

10,00

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

Average price for electricity for industry consumers [cent/kWh]

Republic of Korea Power System 20

Price development for households

20

0,00

2,00

4,00

6,00

8,00

10,00

12,00

14,00

1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014

Average price for electricity for households [cent/kWh]

Republic of Korea Power System 21

Energy exchanges in ….21

Republic of Korea Power System 22

Power balance in 2014

Generation : 521.97(TWh) Consuption : 503.7(TWh) Losses : 18.27(TWh)

22

Republic of Korea Power System 23

Electricity marketorganisation

23

Republic of Korea Power System 24

Specific aspects of the electricity market

Cost Based Pool (CBP) Compulsory Power Pool A Day Ahead Market Uniform Pricing Capacity Payment (CP) Ancillary Service Fee

24