Développement de l'énergie en Guinée
Développement de l'énergie en Guinée
Développement de l'énergie en Guinée

Vitach Guinée

The main mission of the Kakara hydroelectric development is to generate electricity. The normal water level of the power station reservoir is 42 meters, with a minimum operating level of 37 meters. The nominal head height is 34 meters, and the installed capacity of the power station is 70 MW (35 MW×2). The utilization hours amount to 4180 hours, and the average annual electricity production capacity is 3.01 billion GWh. The electricity production efficiency is excellent.

The power station is equipped with 2 Kaplan axial turbo-alternators, each with a capacity of 35 MW. The diameter of the turbo-alternator wheel reaches 3.8 meters, with a nominal unit speed of 187.5 rpm. The nominal water head height is 34 meters, the nominal flow rate is 121.5 m³/s, and the suction head is 11 meters. The nominal capacity of the turbo-alternator is 45 MVA/35 MW, with a power factor of 0.8. Two main oil-immersed three-phase power transformers are installed inside, each with a capacity of 50 MVA. The 252 kV GIS bus connections apply the indoor layout model. The current power station is connected to the 225 kV coupling station in Boffa with a voltage of the first level being 225 kV.

Kakara

The Kakara Hybrid Hydro-Photovoltaic Project in Guinea is located downstream of the Fatala River, 143 km from the capital Conakry, 36 km from Boffa, and 10 km from the village of Lisso. The project consists of a hydroelectric power plant and a photovoltaic power plant, with a total installed capacity of 120 MW and a multi-annual average total electricity production of 394 GWh. Of this, the installed capacity of the hydroelectric power plant is 70 MW (35 MW x 2), with a multi-annual average of 4314 hours of production, and a multi-annual average production capacity of 302 GWh. The installed capacity of the photovoltaic power plant is 50 MW on the AC side. The first year of electricity on the grid is 99 GWh, with equivalent full-load hours of 1852.7 hours. The annual average electricity on the grid over 25 years is 92 GWh, with an annual equivalent of full-load hours being 1719.9 hours.

Photovoltaic power plant

The photovoltaic power plant is located on the left bank of the hydroelectric power plant, covering an area of approximately 0.8 km², with a planned installed capacity of 50 MW on the AC side. This project includes the construction of a 225/30 kV substation, whose main task is to step up the generated voltage. The first year of electricity on the grid is 99 GWh, with equivalent full-load hours of 1852.7 hours. The annual average electricity on the grid over 25 years is 92 GWh, with annual equivalent full-load hours of 1719.9 hours.

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