Abstract
Information about the problems arising from the uneven production and consumption of energy in power systems, including in the power system of the Republic of Uzbekistan, is given on the example of a daily electrical load schedule. It is noted that to successfully solve these problems, energy is accumulated in the hours of minimum consumption so that it can be used in peak hours with high consumption, and for this purpose, pumped storage power plants are used. A diagram of hydraulic energy storage is given at large pumping stations used to accumulate water in the upper reservoir in hours of minimum loads, and the accumulated volume of water is directed to generate energy, which can be used by pumping stations to supply additional water to its consumers, replenishing its losses in hours of hydraulic energy storage. The method of selection and optimization of the main parameters of this complex, based on minimizing fuel consumption in power plants while limiting the amount of accumulated energy based on the capabilities of water and energy resources of pumping stations, is presented. The calculations using the example of the Syrdarya thermal power plant show that with the integration of five nearby pumping stations into the process of energy storage and generation, significant cost savings are achieved, and the daily load schedule is significantly leveled.
Highlights
As you know, one of the main issues in the energy sector is to ensure maximum compliance of the dynamics of electricity production with the process of its consumption, i.e., production capacity at any moment of time must provide consumption capacity
The main of these problems are the following [8,9,10]: - firstly, the efficiency of using the installed capacity of power equipment in thermal power plants (TPP) decreases, which is the most important factor affecting its payback; - secondly, the frequent operation of power equipment in a variable mode dramatically increases fuel consumption at thermal power plants and leads to premature wear of the equipment; - thirdly, the technical possibilities of reducing and increasing the capacity of the generating equipment of TPP may be insufficient to compensate for changes in consumption; in this case, excess electrical power is transferred to other regions, which is associated with significant energy losses
Considering the above factors, as one of the options, we propose a layout of the pumped storage power plant at the pumping stations Jizzakh-1, Jizzakh-2, Jizzakh-3, Arnasoy-1, and Arnasoy-2 to integrate them into the process of electricity generation at Syrdarya TPP
Summary
One of the main issues in the energy sector is to ensure maximum compliance of the dynamics of electricity production with the process of its consumption, i.e., production capacity at any moment of time must provide consumption capacity. The main of these problems are the following [8,9,10]: - firstly, the efficiency of using the installed capacity of power equipment in thermal power plants (TPP) decreases, which is the most important factor affecting its payback; - secondly, the frequent operation of power equipment in a variable mode dramatically increases fuel consumption at thermal power plants and leads to premature wear of the equipment; - thirdly, the technical possibilities of reducing and increasing the capacity of the generating equipment of TPP may be insufficient to compensate for changes in consumption; in this case, excess electrical power is transferred to other regions (or obtained from other regions), which is associated with significant energy losses. Graphs of electrical load in the Republic are characterized by significant unevenness (Figure. 1)
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