Name
Denisenko Evgeny Aleksandrovich
Scholastic degree
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Academic rank
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Honorary rank
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Organization, job position
Kuban State Agrarian University
Web site url
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Articles count: 9
The level of technical development today requires the creation of highly effective, including reliable, uninter-rupted power supply systems. We have shown modern requirements and design features of modern systems of uninterruptible power supply, which should be built on a modular principle. It is shown that the problem of synthesis of systems in a modular approach is addressing three issues: development of the structure of the system subject to the requirements of consumers to quality of power and the allowable time of power outage; determining the required level redundancy of major functional units (blocks, elements) to ensure the required reliability of the system; - ensuring the most effective interconnection of modules, including electromagnetic compatibility, and the rational use during normal and emergency operation of the system. We have proposed new structural solution of the main functional units and uninterrupted power supply systems in modular design. To reduce EMI and improve efficiency uninterruptible power supply systems in the design of static converters we need to use a transformer with a rotating magnetic field. In addition, the prospective current is to be used as a source of renewable energy. Another promising approach is the use of direct frequency converters as voltage stabilizers and frequency of the current
Promising is the direction and, above all, in matters of energy saving and energy efficiency of Autonomous systems of power supply, the use of renewable sources-newable energy as a major source of energy for consumers in remote areas. Here priority is given to solar energy. Since solar radiation can be change place not only in heat and electrical. The article contains three main structural schematics of electricity supply with solar power plants. The features of their work are disclosed, as well as an algorithm for calculating solar energy systems, the sequence of which is to define the required parameters, the daily energy consumption by consumers of electric power, the calculation capacity of the battery, the choice of the inverter and determining the area of solar batteries. The article reveals the conditions that affect the calculation of the PV system. It is shown that the greatest efficiency, including economic and reliability we have at combined (hybrid) Autonomous system, which was carried out with both solar power and wind power and gas stations. The important matters of improving the reliability of solar systems are the introduction to the design of a new element of the base, and first and foremost, Autonomous inventors performed on a single-phase transformer with a rotating magnetic field
In the autonomous power supply systems there are
widely used frequency converters that are able to
simultaneously increase or decrease the frequency of
the current and voltage stabilizing power supply.
These positive properties of frequency converters can
improve the operational and technical characteristics
of the autonomous power supply system in the
complex. The article suggests a functional diagram of
a frequency converter performed on reversible
rectifiers. We have presented timing diagrams
illustrating the principle of its operation. The article
also deals with two functional scheme of direct
frequency converters executed on single-phase, threephase
transformer with a rotating magnetic field. The
principle of operation of these schemes has been also
discussed in the timing diagrams. The proposed
technical solutions for frequency converters contain a
smaller amount of power electronic devices that make
it possible, thereby reducing the level of
electromagnetic interference, increase the efficiency
and reliability of performance inverters. The
considered scheme of frequency converters, can
improve the technical characteristics of the
autonomous power supply systems in the complex. We
can significantly improve the performance of power
systems through the use of modular aggregating
principle of the basic functional units of an
autonomous system
To determine the feasibility of using PV systems we
should assess the economic efficiency of wind energy
in the region. At the same time, the first step should be
an analysis of upper-air and power characteristics of
the wind. The next stage is to determine the energy
source of wind power (theoretical, technical and
economic potential). The basic approach to the
calculation of economic indicators should include a
determination of the effectiveness of wind power
installations in competition with traditional energy
sources in a particular region. There are important
following indicators: the payback period and economic
efficiency. If the economic potential of wind power
satisfies the requirements, the next step is to study the
technical requirements applicable to wind power
stations. For a preliminary assessment of the terrain,
the article discloses a sequence of events that must be
performed to assess the effectiveness of the installation
of wind power systems. We have listed advantages and
disadvantages of the main types of wind power plants,
and other ramifications of choosing of basic functional
units. The considered in an article analytical
expressions for calculating the evaluation of economic
efficiency of wind energy, the technical requirements
for the basic parameters of wind turbines and their
main advantages, disadvantages and features the work
will allow at the design stage to carry out a preliminary
assessment of effectiveness of the wind power stations
for a particular region and locality, specific types
consumers in view of their modes of operation and the
quality requirements of electricity
The article describes the main block diagrams of three
types of uninterruptible power supply: backup;
interactive; double conversion. The main functions
are: the function backup or emergency source of
electrical power; the function of protective devices
(from an overload currents and short-circuit);
improving the quality of the power supply voltage.
Alsoб we have disclosed the features of the advantages
and disadvantages of uninterruptible power supplies
three groups: Off-Line / Stand-By / back-up UPS
(passive - reserve); Line-Interactive (line interactive
type); On-Line. The article discloses new approaches
to structural and schematic-based uninterruptible
power supply, including at use of renewable energy, so
that the failure of one of the sources does not lead to
exit from the operation of the entire of power supply
system. As a rule, such systems are built on a modular
principle. It is shown that now for remote users from
external networks is advisable to apply a system
autonomous power supply, representing the totality of
sources and converters of electric power, ensuring
uninterrupted power supply to consumers. We have
presented a typical structure of autonomous systems
and given an option of the block diagram of the system
and are given explanations and principles of its work.
Significantly improves performance reliability of
autonomous systems using the modularity of its main
functional units. In addition, to increase the efficiency
of the system can be through the use in the
construction of transformers with static converters
rotating magnetic field. To improve the weight, which
is important for the transport systems, it is necessary to
use links with the intermediate high-frequency electric
power conversion in static converters
The study of the use of ozon-air mix is presented in the article as a disinfecting substance in production of dietary supplement. A comparative analysis of various technologies of sterilization is provided
The article is devoted to the construction of nomograms for determining geometrical dimensions of electroisolator the amount of residual pathogenic microflora on the surface of plant substrates
coreproducts
The thermal balance of an electro-ozonizer is presented in this article. As the share of radiant energy having impact on heating of the generator of ozone is defined and the way of decrease in this influence is offered
Article is devoted to justification of influence of ozon-air mix at sterilization of vegetable substrata and fodder grain in the course of biotechnological production