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Vietnam: Growth in Electricity Transmission Network [free access]

At the end of 2020, Vietnam’s transmission sector comprised 48,326 km of transmission lines ranging between 110 kV and 500 kV. The majority or about 44 per cent of the line length comprises 110 kV lines. Since 2016, line length has increased at a CAGR of 2.99 per cent.

Vietnam’s transformer capacity stood at 1,70,905 MVA by the end of 2020. Of the total, 38 per cent of the transformer capacity was at the 220 kV level, 36 per cent was at the 110 kV and 26 per cent was at the 500 kV level. Since 2016, the transformer capacity has increased at a CAGR of 8.52 per cent.

EVN holds a monopoly in the transmission segment through its subsidiary National Power Transmission Corporation (EVN NPT), which was established in 2008. EVN NPT is responsible for the development of up to 500 kV assets in the country.

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

Note: Data for 2019 and 2020 is estimated based on historical growth rates. As of 2016, data includes 19,335 km of 110 kV and 108 km of 220 kV lines operated by EVN's distribution subsidiaries.    

Source: EVN NLDC; EVN NPT; Ministry of Industry and Trade; Global Transmission Research 

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

Note: Data for 2019 and 2020 is estimated based on historical growth rates. Source: EVN NLDC; EVN NPT; Ministry of Industry and Trade; Global Transmission Research