Micro pumped storage power plant. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Micro pumped storage power plant. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Alternative energy sources

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Mini pumped storage station (mini pumped storage power plant) implies the use of turbopumps in the free high-speed flow of mountain rivers. The same principle can be used for lowland rivers, in which case a high-speed flow is created by artificially narrowing the riverbed. The new system makes it possible to abandon dams, which reduces the anthropogenic load on the landscape.

The disadvantage of a conventional pumped storage station (PSPP) is the need to have 2 reservoirs occupying a lot of land - the lower one at the dam and the upper one at the estimated height. Modern autonomous micro hydroelectric power plants have automatic devices that connect a ballast load to them, so that when the electrical load decreases, the rotational speed of the units does not exceed the permissible value. Autonomous micro hydroelectric power plants (unlike diesel generators and windmills) operate continuously throughout the day and up to almost 20 hours per ballast load.

In accordance with the proposed concept, autonomous micro-PSPPs have one or more turbopumps installed in the dam of a low-pressure hydroelectric power plant or in a riverbed, and operate continuously at a constant power, pumping water into the upper reservoir of the micro-PSPP. An autonomous micro-PSPP does not require a large upper reservoir, because its power is small, and when using a free-flow turbopump, a lower reservoir and dam are not required at all. A swimming pool or a small pond, 2-3 tanks of 100 cubic meters each or a water tower can be used as the upper reservoir.

From the upper reservoir, water under high pressure is supplied through pipes to a 400 V turbogenerator located in a convenient place for the consumer, which makes it possible to do without voltage transformers. Water after the turbogenerator can be used for irrigation and other household needs, providing comfortable living conditions. The high water pressure allows the use of a turbogenerator with a high rotational speed, i.e. with low specific weight and dimensions.

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