Electricity generation 

STEG has built 20 power plants (combined cycle, steam and gas turbine, hydraulic, and wind). The choice of technologies is governed by for the optimal solutions regarding reliability, availability, cost and clean energy.

THERMAL STEAM 40,1% Combined cycle 29,2% Gas Turbine 28,2% Hydraulic 2.1% Aeolian 0,4%

In order to contribute to environment protection, STEG integrated the wind energy among its choices. Thus, a first wind power station of 20 MW was put into operation from 1999 in Sidi Daoud in the North East of the country. Besides, STEG plans to implement a second project with an additional capacity of 40 MW in 2006.

 Transmission
STEG transmission network  involves 60 HV substations and about 5000 km of HV lines.
Aware of the network reliability , STEG introduced hot line working on HV network and digital techniques in the protection system of HV lines.

 Interconnection
STEG transmission network is connected to Europe through Algerian and Moroccan networks. Interconnection with Libya will allow to extend the synchronous zone with Machrek countries till Syria through Libya, Egypt and Jordan.

 Development Perspectives  
The expected opening of the electricity market  within this decade will justify the construction of well-sized transmission channels between neighboring networks.
A feasibility study of a transmission line from Egypt up to Morocco has already been started in order to evaluate the benefits granted  and to determine the necessary enhancements for insuring maximum exchange.
A link between Tunisia and Italy is still a solution to be considered in order to enhance the opportunities of commercializing energy between the two shores of the Mediterranean.

 Distribution
More than 120 000 km of medium voltage and low voltage lines have been settled by STEG to distribute electricity all over the country.

 STEG is present all over Tunisia
STEG is supplying more than 2 500 000 customers with electricity (domestic, professional, industrial, agricultural, administrative). It keeps up relationships with its customers through 34 districts and 79 agencies. The global electrification rate of the country (urban and rural) is 96%.

 Development Perspectives
Within the coming years, efforts will be essentially focused on improving the urban networks and modernizing the  network system operation, while contributing to a clean environment and preserving the aesthetic side of cities.
STEG is also upgrading its customer management system while keeping on its assistance action to local suppliers for setting up a quality system based on ISO 9000 standards.