Mini-hydroelectric power plants can be classified according to its head, namely;
1. Low head - 2 to 20 meters
2. Medium head - 20 to 150 meters
3. High head - 150 meters and above.
It can also be classified according from the point of view of power supply.
1. Stand-alone or isolated plants - supply an independent load center without being connected to other generating plants
2. Grid-connected plants - supply power to national, regional or island grids, which are operated by other power plants of bigger capacities.
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