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Data & Statistics

Thailand: Growth in Electricity Transmission Network [free access]

January 7, 2021

As of 2019, the transmission network in Thailand comprised about 35,963 circuit km of line length at 115 kV and above voltage levels. Of the total line length, the majority, or about 43 per cent, was at 230 kV, followed by 39 per cent and 18 per cent at 115 kV and 500 kV respectively. Since 2015, Thailand’s transmission line network has grown at a CAGR of close to 2 per cent, with net additions of over 2,988 km.

 

The transformer capacity of Thailand stood at 121 GVA as of 2019, while making significant addition at 500 kV, accounting for close to 66 per cent of the additions during the 2015–19 period. The country added 14 substations during the same period to reach close to 229 substations by 2019.

 

Table 1: Growth in Thailand’s transmission line network (circuit km)

Voltage

2015

2016

2017

2018

2019

115 kV AC

13,813

13,497

13,497

13,307

13,998

132 kV AC

9

9

9

9

9

230 kV AC

14,143

14,794

16,494

16,261

15,357

300 kV DC

23

23

23

23

23

500 kV AC

4,988

5,025

5,025

4,954

6,575

Total

32,975

33,348

35,048

34,554

35,963

Note: Data excludes 69 kV transmission lines.  AC – alternating current; DC – direct current

Source: Electricity Generating Authority of Thailand

 

 

Figure 1: Growth in Thailand’s transformer capacity (MVA)


Note: Data excludes 69 kV transmission lines.  AC – alternating current; DC – direct current

Source: Electricity Generating Authority of Thailand