Utilize the minimum flow of a river having no appreciable poundage on its upstream. (adsbygoogle = window.adsbygoogle || []).push({}); Hydropower plants range in size from small systems for a home or village to large projects producing electricity for utilities. The powerhouse is located at the toe of the dam. An impoundment facility, typically a large hydro-power system, uses a dam to store river water in a reservoir. When the demand for electricity is low, a pumped storage facility stores energy by pumping water from a lower reservoir to an upper reservoir. Water flows through penstocks embedded in the dam to the powerhouse and joints main river course directly at the outlet of the powerhouse. Classification of Hydroelectric power plant based on storage capacity: Rum-of-river (ROR) plants Those plants which do not regulate hydro-graph of the river by one or more seasons. Here power is generated by diverting an ample source of water such as seawater into a natural topographical depression that provides operating head for the plant. Suitable for medium to high head project. In this system, the turbine also worked as a motor reversibly. E.g. Kaplan turbine), ( Mixed flow turbine is used. A small or micro-hydroelectric power system can produce enough electricity for a home, farm, ranch, or village. The pump increases the head in the feeder reservoir of a separate hydro-electric plant while motor improves the power factor in the electric supply network. The water from the river could be diverted along the tunnels from an upstream point of the river to a downstream point of the same river. Francis turbine), ( High turbine is used. A dam is constructed to create a storage reservoir that develops the necessary head for the powerhouse. Generally the mini, micro, and pico hydro come under the subcategory of small hydro plants. 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Types of Dam | Based on materials, function construction material etc. The sizes of hydropower plants are described below. Classification based on constructional feature: Head development may achieved in different ways; The main distinguishing feature of such plant is the development of high head resulting from the diversion of water. The flexibility of generating the electricity usually is either in a large scale or in a smaller scale depending on the usage. Classification According to Availability of Water Head C. Classification According to Type of Load Supplied D. Classification of Hydroelectric Power Plants Based on Installed Capacity. D. Classification of Hydroelectric Power Plants Based on Installed Capacity: Apart from above classification, hydroelectric power plants can be classified, on the basis of installed capacity, as large, medium, small, mini, and micro hydro power plants. The head may be made available due to the fatter bed slopes of the power canal as compared with the river. RUN-OF-RIVER TYPE These are hydro power plants that utilize the stream flow as it comes , without any storage being provided. Different countries classify differently based on the head of water. The most common type of hydroelectric power plant is an impoundment facility. There are different types of Hydroelectric power plant ( Hydropower plants). Energy (which is used to pump the water from downstream to the upstream reservoir) is generated during peak hours. 12. Water released from the reservoir flows through a turbine, spinning it, which in … There are two main types of hydro turbines: impulse and reaction. In this type of plant, weir or barrage is constructed across a river, simply to rise and maintain the water level at a certain height. There are different types of Hydroelectric power plant (Hydropower plants). In the case of natural fall, the water is diverted from upstream of fall and is let back into the river flowing through the powerhouse on the downstream.