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Mexico: Growth in Electricity Transmission Network [free access]

July 14, 2020

Mexico’s electricity sector is dominated by Comisión Federal de Electricidad (CFE), which holds a monopoly in the power transmission segment. Mexico’s transmission network is spread across 53 regions. Of these, 49 regions are interconnected, and the remaining four regions form an isolated group in Baja California Sur. The national interconnected system is known as Sistema Eléctrico Nacional (SEN).

 

As of December 2019, the transmission network in Mexico comprised about 105,750 km of line length at 115 kV and above voltage levels. Of the total line length, the majority, or about 48 per cent, was at 115 kV, followed by 28 per cent at 230 kV and 24 per cent at 400 kV. Since 2015, Mexico’s transmission line network has increased marginally, with net additions being a little over 4,258 km, growing at a CAGR of 1.03 per cent between 2015 and 2019. Meanwhile, the transformer capacity of Mexico stood at 163 GVA as of 2019.

 

Further, in 2020, CFE is expected to invest MXN602 million in the maintenance of power transmission lines (conductors or semiconductors system power transmission).

 

Table 1: Growth in Mexico's transmission line network (km)

Voltage 

2015 

2016 

2017 

2018 

2019E 

–115 kV

 46,147 

 46,326 

47853

 48,013 

 48,694 

–138 kV

 1,608 

 1,152 

1691

 1,779 

 1,817 

–161 kV

 522 

 523 

519

 519 

 519 

–230 kV

 28,518 

 28,476 

29095

 29,115 

 29,265 

–400 kV

 24,697 

 24,714 

24747

 25,455 

 25,455 

Total

 101,492 

 101,191 

 103,905 

 104,881 

 105,750 

Note: 2019 data based on CAGR during the period 2009-18.

Source: SENER; Global Transmission Research 

 

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

Source: Sistema de Información Energética (SIE); SENER; Global Transmission Research