The total installed capacity of the primary substation was increased from 100 MVA to 130 MVA by replacing the two 110/20 kV transformers of 25 MVA each, with others of 40 MVA each with low losses. The primary substation has been operational since late 1960s and now serves about 7,700 medium and low voltage consumers, among them industrial customers and trading companies respectively.
During 2020-2022, following another investment amounting to approximately 8 million RON, the modernization works of the 6kV medium voltage section of the primary substation were also completed, which allowed its integration into the telecontrol. In the coming period, LED lighting fixtures will also be installed in this space to ensure a high level of energy efficiency.
The Dudesti primary substation is an important energy node for the east of Bucharest, having a configuration of 12 high voltage cells of 110 kV, respectively 28 cells of 20 kV and 36 cells of 6 kV of medium voltage. The primary substation is equipped with telecommunications equipment that ensures its integration into the telecontrol system since 2011 for the 110 kV and 20 kV voltage levels and, from 2021, for the voltage level of 6 kV.
In Bucharest, E-Distributie Muntenia operates 70 primary substations to ensure optimal supply to consumers. E-Distributie companies operate networks with a total length of over 133,000 kilometers in three important areas of the country: Sud Muntenia (including Bucharest), Banat and Dobrogea, covering one third of the local distribution market, and develop an investment program to improve the quality of services, the safety and performance of networks and the local implementation of the environmental standards of the Enel Group. The electrical networks operated by the three E-Distributie companies consist of 287 primary substations and over 24,000 substations. In 2022, they distributed 15.5 TWh of electricity through high, medium and low voltage power lines.