Spanish Power System 1

The Electric Power System

- Spain -

Country’sflag

Spanish Power System 2

Basic facts

Area: 505 957 km2

Population: 46 439 864 (2015)

Number of TSOs: 1

Number of DSOs: 336

(source: MINETUR)

28 Mio. consumers

(source: CNMC)

Peak load: approx. 41 GW (2015) ; 46 GW (2007)

(source: REE)

Average interruption of electricity: 5,3 min (2014)

(source: REE)

Spanish Power System 3

Spain in the European meshed grid

Interconnectors with:

France

Portugal

Morocco

Andorra

Source : ENTSO-E

Spanish Power System 4

Up to 2.800

Up to 2.800

1.800-4.000

1.800-3.300

600

900

Grid facts and characteristicsMainly 400 and 220 kV assets.

Highly meshed transmission grid. High Psc.

Limited exchange capability with other systems.

Diversification of power generation technologies.

Important contribution of renewable technologies.

Values in MW.

Spanish Power System 5

Structure of electrical power systemGenerators International Exchanges · REE

Daily and IntradailyMarket

Demand bids

Energy flows

Communication

Transmission network· REE System Operator· REE

Market Operator· OMIE

TSO (foreign)

Distribution companies

R ed de dis tribuc ión< 132 kV

S ubes tac iónde dis tribuc ión

Qualified consumers

Outages

Ancillary Services

Ancilliary services bids

Consumers with/without last resort tariff

Suppliers Last resort suppliersDemand bids

Demand offers

Source : REE

Spanish Power System 6

Structure of electrical power supply. Interface T-D [MVA transformation]

TSO

400 kV

220 kV

132 kV

20/10 kV

220-380 V IndustryHouseholdsComercial Companies

TS

O-G

rid

DS

O-G

rid

Bulk-Industry &

Singular Consumers

(High-Speed Train)

Dispersed

Generation

Conventional

and

Renewable

Generation

6

220 - 400 kV

Spanish Power System 7

Map of the high voltage grid

Source : REE

Spanish Power System 8

Information on TSO

Name: REE

Network length (km) : 39 905

Served area (km²) : 505 957

Annual energy consumption (TWh) : 243,5

(source: REE)

Website: http://www.ree.es

Spanish Power System 9

Information on TSO1985 2010 2011 2012 2013 2014

km of 400 kV circuit Red Eléctrica 9,860 18,792 19,671 20,109 20,639 21,094

Other companies 899 0 0 0 0 0

Total 10,759 18,792 19,671 20,109 20,639 21,094

km of < 220 kV circuit Red Eléctrica 4,069 17,291 17,891 18,260 18,558 18,702

Other companies 10,258 109 109 109 109 109

Total 14,327 17,401 18,001 18,370 18,667 18,811

Total km of the transmission grid

Red Eléctrica 13,929 36,084 37,563 38,369 39,197 39,795

Other companies 11,157 109 109 109 109 109

Total 25,086 36,193 37,672 38,478 39,306 39,905

Busbars Red Eléctrica 373 3,762 3,961 4,150 4,295 4,360

Other companies 1,099 113 113 113 113 113

Total 1,472 3,875 4,074 4,263 4,408 4,473

Transformer capacity

(MVA)

Red Eléctrica 2,311 66,596 68,996 74,596 76,871 79,871

Other companies 26,616 0 0 0 0 0

Total 28,927 66,596 68,996 74,596 76,871 79,871

Source : REE

Spanish Power System 10

Cooperation of TSO and DSOsActive power

TSOs and DSOs calculate limits that apply to generatorsthat contribute to a constraint.

With this limits and the units involved, the TSO calculatesthe individual set-points according to regulation.

Real time measurements

Set points

RESCC1 RESCCn…

TSOGeneration

management

TSONetwork

management

DSOs

Limits

Limits

Measurements

Measurements

Spanish Power System 11

Cooperation of TSO and DSOsPower factor regulation

TSOGeneration

management

TSONetwork

management

DSOs

RESCC1

RESCCn

TSOSettlement

Set points

Power factor set points

Transmission

Power factor set points

Distribution

Settlement

…

Scheme similar to active power.

Spanish Power System 12

Installed capacity with reference to primary resources (2014)

Technology MW %

Hydroelectric (1) 19,897 19.5

Nuclear 7,866 7.7

Coal 10,972 10.7

Fuel + gas 520 0.5

Combined cycle 25,348 24.8

Wind 22,845 22.3

Solar photovoltaic 4,428 4.3

Solar thermoelectric 2,300 2.2

Renewable thermal 1,012 1.0

Cogeneration and other non-renewable

7,075 7.0

Total 102,262

Hydroelectric (1)19,5%

Nuclear7,7%

Coal10,7%

Fuel + gas0,5%

Combined cycle24,8%

Cogeneration and other non-

renewable7,0%

Wind22,3%

Solar photovoltaic

4,3%

Solar thermoelectric

2,2%Renewable

thermal1,0%

Source : REE

Spanish Power System 13

Energy production withreference to primary ressources (2014)

Technology GWh %

Hydroelectric (1) 38,790 15.5

Nuclear 54,925 22.0

Coal 41,139 16.5

Combined cycle 21,328 8.5

Cogeneration and other non-renewable

25,596 10.2

Wind 50,630 20.3

Solar photovoltaic 7,794 3.1

Solar thermoelectric 4,959 2.0

Renewable thermal 4,718 1.9

Total 249,880

Hydroelectric (1)15,5%

Nuclear22,0%

Coal16,5%

Combined cycle8,5%

Cogeneration and other non-

renewable10,2%

Wind20,3%

Solar photovoltaic

3,1%

Solar thermoelectric

2,0% Renewable thermal

1,9%

Source : REE

Spanish Power System 14

Development of generation capacity since 2005

0

20 000

40 000

60 000

80 000

100 000

120 000

2005 2006 2007 2008 2009 2010 2011 2012 2013 2014

Hydroelectric (1) Nuclear

Coal Combined cycle

Cogeneration and other non-renewable Wind

Fuel+gas Solar photovoltaic

Solar thermoelectric Renewable thermal

Source : REE

Spanish Power System 15

Location of renewable energy sources

WindPhotovoltaic

Thermoelectric

Spanish Power System 16

Development of wind power

9 654

11 290

13 529

15 977

18 72319 569

21 026

22 617 22 84522 845

0

5 000

10 000

15 000

20 000

25 000

2005

2006

2007

2008

2009

2010

2011

2012

2013

2014

+13191 MW

Spanish Power System 17

Development of photovoltaic power

43 119

612

3 207 3 250

3 6544 057

4 3204 422 4 428

0

500

1 000

1 500

2 000

2 500

3 000

3 500

4 000

4 500

5 000

2005

2006

2007

2008

2009

2010

2011

2012

2013

2014

+4385 MW

Spanish Power System 18

Development of thermoelectric power

0 11 1161

232

532

999

1 950

2 300 2 300

0

500

1 000

1 500

2 000

2 5002005

2006

2007

2008

2009

2010

2011

2012

2013

2014

+2300 MW

Spanish Power System 19

Development of mini-hydro power

1 6951 796

1 871

1 9812 022

2 0362 042

2 042

2 1052 105

0

500

1 000

1 500

2 000

2 500

2005

2006

2007

2008

2009

2010

2011

2012

2013

2014

Spanish Power System 20

Power balance in 2014 Generation (TWh): 253.6

Consumption (TWh): 243.5

International Imports (TWh): 3.6

International Exports (TWh): 7.0

Generation253.6 TWh

Comsumption243.5 TWh

Spanish Power System 21

Market coupling

Day-ahead market: MIBEL

E

P

Eb

Pm

Uv E+P

Uc E+P

No congestion Spain-Portugal

Spanish Power System 22

Market splitting

Day-ahead market: MIBEL

E

P

EcE

PmE

UvE

UcE

E

P

EcP

PmP UvP

UcP

Market Splitting: Congestion (i.e. Spain→Portugal)

NTC

PmE*NTC

PmP*