Development of an combined energy complex consisting of a micro-hydroelectric power plant and a solar photoelectric plant for the conditions of Uzbekistan

Deve
l
opment
of
an
combined
energy
complex consisting of a micro-hydroelectric
power plant and a solar photoelectric plant for
the conditions of Uzbekistan
Feruza
Yusupova
1
, and
Nomomjon
Sultanov
1*
1
Fergana Polytechnical Institute, 150107 Fergana, Uzbekistan
Abstract.
The article develops a block diagram of an energy device that
serves as the embodiment of a microhydroelectric power station and a solar
photovoltaic installation. Based
on this structural diagram, a combined
energy device consisting of a solar photovoltaic power plant and a
microhydroelectric power station was
developed and installed for
experimental research at the family enterprise “Akbarzhon Korki” in the
Sokchilik microdistrict, Toshlok district. Based on the needs of the family
business, the electricity generated by a combined power plant consisting of
a 4 kW solar photovoltaic system and a 0.7 kW microhydroelectric power
plant was used for lighting systems, a refrigerator, an electric cooking stove,
and a modem. Internet connection device and video surveillance equipment.
As a result of the implementation at the family enterprise, 2 124 000 soums
of electricity produced by the combined energy device were used for the
enterprise’s own needs during the year, and economic efficiency of 12
599
000 soums was achieved.
1 Introduction
If the world's existing underground fuels are used quickly, then, according to the International
Energy Agency, oil,
the main hydrocarbon fuel, will amount to 1.734 trillion barrels
worldwide within 53 years, natural gas - 196.8 trillion cubic meters within 60 years, and coal
- more than 150 years, according to forecasts, it will come with time. Therefore, due to the
uneven distribution of underground fuel resources on a global scale, this leads a number of
countries to economic energy dependence, and the economic development of these countries
is limited due to energy shortages [1-2].
As a result of the use of large amounts of natural gas fuel in the daily life of industry
during the production of electricity, large amounts of toxic
gases are released into the
environment, as well as the daily depletion of fuel reserves. resources [3-5].
The substantially to rapid economic growth and industrialization depends upon the
electrical energy. To ensure the sustainable development,
having reliable, secure and
*
Corresponding author:
zokhidjon@ferpi.uz
, 05027 (2024)
BIO Web of Conferences
AQUACULTURE 2023
https://doi.org/10.1051/bioconf/20248405027
84
© The Authors, published by EDP Sciences. This is an open access article distributed under
the terms of the Creative
Commons Attribution License 4.0 (https://creativecommons.org/licenses/by/4.0/).
afordable energy service to the community is important [6]. As a result, combining renewable
resources may be able to meet a greater portion of electricity consumption, while also
providing a stable and consistent supply of energy [7-8]. Therefore, the transition to the use
of renewable energy sources becomes a pressing and important issue.
In this regard, in our republic, special attention is paid to the widespread introduction of
renewable energy sources in the sphere of social and housing and communal services, as well
as in sectors of the economy to cover the energy deficit by increasing energy efficiency. In
particular, a subsidy has been established in the amount of 1000 soums from the state budget
for each kilowatt-hour of electricity produced by solar panels installed on private facilities
and transferred to a unified electric power system [9]. Also, continuous electricity production
is realized through the modernization of existing micro-hydroelectric
power plants, the
development of new types and combining them with solar photovoltaic power plants.
The use of alternative energy sources makes it possible to reserve sources of electrical
energy. Each converter in an alternative energy source has its own disadvantages. This leads
to the combination of two different types of energy sources to overcome these disadvantages,
i.e. solar panels are used during the day or when water flow is low, while microhydropower
is used in the evening or when the weather is cloudy.
A scheme for parallel connection of two or more renewable energy sources was proposed
by A. V. Akkuratov and others. When two or more renewable energy sources are connected
in parallel, their voltages are not the same. If the voltage of one of the two energy sources is
greater, this source supplies the consumer with electricity. Low-voltage sources, instead of
providing energy, switch to energy receiving mode. Some of the energy of the energy source
is lost to other sources, causing excessive energy losses, resulting in a decrease in its energy
efficiency [10].
To overcome this, a block diagram of an integrated energy device was developed,
consisting of a solar photovoltaic power plant and a microhydroelectric power plant, as a
result, it became possible to increase its energy efficiency by connecting a solar photovoltaic
power plant. plant and micro-hydroelectric power station successively over time.
Figure 1 shows a simplified version of the energy system based on renewable energy
sources, presented in utility model FAP 02108 for two sources:
a block diagram of an
embodied energy device consisting of a solar photovoltaic plant and a microhydroelectric
power plant [11].
The power plant works as follows. Electricity will be produced by solar photovoltaic
power plant No. 1 (solar energy) and microhydroelectric power plant No. 2 (water flow
energy). Rectifier 3 adjusts the voltage of the micro-hydroelectric power station to constant.
The first control unit 6 measures voltages and generates pulses, the duration of which is
determined by their magnitude. These pulses are supplied to switches 4 and 5, which operate
alternately, and to boost converter 7, which does not operate sequentially. As a result, the
boost converter receives energy from sources through open switches and generates a stable
voltage at its output.
, 05027 (2024)
BIO Web of Conferences
AQUACULTURE 2023
https://doi.org/10.1051/bioconf/20248405027