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Spain: Growth in Electricity Transmission Network [free access]

January 10, 2022

As of December 2021, the transmission network in Spain comprised about 44,717 circuit km of line length at 132 kV and above voltage levels. Of the total line length, the majority, of about 49 per cent, was at 400 kV, followed by 45 per cent at 200 kV and 6 per cent at 132 kV.

 

Since 2017, Spain's transmission line network has increased marginally, with net additions being a little over 2,314 circuit km — growing at a CAGR of 2 per cent between 2017 and 2021. The country’s transmission network saw an increase in 132 kV line length, which increased from just 524 circuit km in 2017 to 2,865 circuit km in 2021.

 

Table 1: Growth in Spain's transmission line length (circuit km)

Voltage (kV)

2017

2018

2019

2020

2021

400 kV

21,735

21,737

21,748

21,764

21,766

200 kV

19,641

19,735

19,853

19,886

20,086

110-132 kV

524

636

697

753

2,865

Total

41,900

42,108

42,298

42,403

44,717

Annual growth rate (%) 

0.3

0.5

0.5

0.2

5.5

Notes: Data as of December for every year

Source: Red Eléctrica de España; Ministry of Industry, Tourism and Commerce, Spain 

 

The transformer capacity stood at 94.5 GVA as of 2021, increasing from 86.6 GVA in 2017 and registering a CAGR of around 2 per cent. During 2017-21, close to 8 substations were commissioned.

 

Figure 1: Growth in Spain's transformer capacity (MVA)

 

Note: Data as of December for every year; data revised from 2012 onwards as per the REE estimates.

Source: Reseau de Transport d'Electricite; Global Transmission Research