Reducing energy costs of large pumping stations by using renewable energy sources

Abstract

Relevance: the energy supply of consumers by the centralized energy system has significant shortcomings, which include significant energy losses due to the remoteness of some consumers, the lack of the necessary flexibility of the production process due to the low share of highly maneuverable power plants and energy storage systems, as well as highly efficient mechanisms for regulating consumption and tariffing of energy. Today, in the world energy industry, these shortcomings of the centralized energy system have created conditions for the transition to other, more efficient energy systems, which include local energy systems. It is proposed to create one of such systems on the basis of the Talimarjan energy and water management zone, including the Talimarjan thermal power plant, a cascade of pumping stations of the Karshi main canal (electricity consumer), a photovoltaic plant and a hydroelectric power station on the Talimarjan reservoir.

Aim: analysis and justification of the parameters of combined power supply of the cascade of pumping stations of the Karshi main canal, determination of the levelized cost of electricity (LCOE) and the economic effect of using the proposed power system.

Methods: methods of energy-economic analysis and calculations of the parameters of combined use of different power plants were used.

Results: the results of the calculations showed that the use of a local power system to cover part of the energy needs of the cascade of pumping stations of the Karshi main canal with renewable energy sources allows to reduce the levelized cost of electricity (LCOE), thereby reducing energy costs for water supply, increasing the reliability of power supply.