Mainstream Energy Solutions Ltd (MESL), the concessionaire company of Jebba Hydropower Plant in Nigeria, has awarded Andritz Hydro a contract for the integral rehabilitation of generating unit 2G6 at the key power plant.
Andritz’s scope of supply and services for the two-year project includes the full rehabilitation of the intake gate, turbine, generator and all unit related auxiliary systems. A new digital turbine governor, excitation system, unit control system and main step-up transformer will also be supplied for the generating unit.
The Jebba plant is located in North-Central Nigeria on the Niger River, 103km downstream of Kainji Dam. The power plant, which was commissioned in 1984, is equipped with six generating units and is a multipurpose scheme for power generation, flood control and, in principle, navigation.
Jebba is equipped with propeller type turbines with a rated capacity of 96.4MW each, at a rated net head of 27.6m and a discharge of 385m³/sec. The runner diameter is 7.1m. Each turbine can generate a maximum output of 102.9MW at a max net head of 29.3m. All turbines have a clockwise rotational speed of 93.75 r.p.m; the propeller type turbines were originally manufactured by Andritz (former Escher Wyss) and the generators were supplied by Hitachi (Japan).
In addition to the d rehabilitation works on enerating unit 2G6 at Jebba, MESL is planning extensive rehabilitation works on further generating units at both Jebba and Kainji hydropower plant.
Aerial view of the Jebba hydropower plant