name
Grigorash Oleg Vladimirovich
Scholastic degree
•
Academic rank
professor
Honorary rank
—
Organization, job position
• Kuban State Agrarian University
Заведующий кафедрой
Research interests
1. Разработка автономных систем электроснабжения с использованием возобновляемых источников энергии. 2. Разработка методик оценки качества подготовки студентов и эффективности деятельности профессорско-преподавательского состава.
Web site url
—
Current rating (overall rating of articles)
0
TOP5 co-authors
Articles count: 65
Сформировать список работ, опубликованных в Научном журнале КубГАУ
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CONCERNING EFICIENCY AND REASONABILITY OF USING RENEWABLE ENERGY SOURCES IN THE KRASNODAR REGION
Description
In the article, we introduce the criteria for the estima-tion of energy and economic efficiency of renewable energy sources as well as of its application and using in the Krasnodar region. Also hereby the main goals are examined and the plan of development of renew-able energy in the region is proposed
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EVALUATION OF THE QUALITY OF EDUCATION OF STUDENTS AND EFFECTIVENESS OF TEACHERS
Description
Modern universities do not have effective techniques for evaluating the quality of education of students and effectiveness of teachers' activity that allows controlling and directing its activities. We have proposed to perform the quality evaluation of students preparation based on the results of intermediate assessments, examinations, and test results of the teachers, who held their classes. The article provides analytical expressions for calculating the quality of the current preparation of students and the quality of education of graduates, the effectiveness of teachers in core activities (educational, methodical and scientific work). In assessing the quality of education, we have considered the learning outcomes, employment potential, i.e. educational and labor activity. The proposed techniques will increase the objectivity of the assessment of the quality of graduates’ education in technical universities and the effectiveness of teachers. This will allow us to make changes in the organization of educational process and the content of working programs of training, educational and methodical and material and technical support, to change the contents and technologies of improvement of qualification of the teaching staff that will contribute to increase demand for graduates in the labor market
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PROSPECTS AND FEATURES OF BIOGASOLINE STATIONS
Description
The article deals with one of the promising areas belonging to energy-saving technologies; it is the introduction of biogasoline stations into agricultural production. The analysis of the application in the world has been shown. To determine the cost-effectiveness of biogasoline stations we have shown the data for the calculation of the potential of biomass: organic waste settlements; animal waste; waste of poultry; crop residues; waste processing industry. We have obtained graphic dependences of electricity generated in the day from livestock and poultry, as well as the number of sunflower, rice, and sugar beets. The table also shows the thermal properties of organic agricultural wastes, allowing increasing the efficiency of calculations to determine the biomass resources. We have considered the schemes of biogasoline stations, a gas turbine power plant and a steam turbine power plant and disclosed the features of their work. To improve the operating and technical specifications of the stations intended for power generation we have proposed using non-contact generators and stabilization of parameters of electric power in their designs to carry out direct frequency converter. We have disclosed the advantages and disadvantages of biogas, as well as the direction of its effective use. It is shown that the use of all the possibilities in the complex of biogasoline stationns (production of fertilizers and motor oil, production of heat and electricity) would improve the efficiency and the payback of investment would be from 3 to 5 years, which is mainly determined by the volumes of biomass
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PROSPECTS OF SMALL HYDROPOWER PLANTS IN THE PIEDMONT AND MOUNTAIN STREAMS
Description
The article reveals the advantages of low energy in comparison with other renewable energy sources. It is shown that broad prospects are visible for small (100 - 1000 kW) and micro hydropower plants (up to 100 kW) when used in the foothill and mountain areas. At the same time, the construction of hydropower plants of sleeve-type has improved the operational and technical characteristics, among other types of small-scale power plants. The article presents main analytical expressions for calculating hydroelectric power generator and it has built graphic dependences for the power generator of pressure and water flow. To improve the performance of small hydroelectric power plants we have proposed using unregulated water turbine and non-contact induction generator in their construction, thus, we could stabilize voltage and frequency directly by the frequency converter. Depending on the requirements of consumers to power supply reliability and electricity quality, we have offered several options for structural and circuit solutions of autonomous systems of electrosupply, made using small hydroelectric power plants. Thus, we can greatly enhance the efficiency of such systems if they are used with other types of renewable sources, such as windfarms or solar power plants
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Description
In this article we have examined the following is-sues: structure flowcharts’ settlements and opera-tional peculiarities of converters and stabilizers of electrical parameters of wind power plants, solar power plants and mini-hydropower plants. All tech-nical decisions are covered by patents of the Russian Federation
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FREQUENCY CONVERTERS WITH IMPROVED PERFORMANCE
Description
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
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THE RESULTS OF THE REFORM OF THE EDUCATION SYSTEM IN RUSSIA
Description
One of the main tasks is the improvement of the education system, the quality of which depends on the level of economic development of the country. In Russia, for more than 10 years there has been a continuously reformed educational system. This is due to Russia's accession (in 2003) to the group of countries – participants of the Bologna Declaration, involving the convergence and harmonization of education systems in European countries with the aim of creating a unified educational space. The article describes the main positions that are subject to a quality assessment of education from foreign universities; we have also revealed the reasons for the low world rating of Russian universities. At present, the education system of the country should facilitate accelerated development of the economy of the state in the first place. This work reveals the shortcomings of the main reforms related to the implementation of CSE in secondary educational institutions, the bureaucratization of the higher education system that resulted in time reduction of contact of the work of students with teachers, and as a result – deterioration of quality of preparation of graduates. We have also revealed the causes of the current situation and the main directions that will contribute to the development of the education system in Russia. These areas are the development of: a strategic plan for the development of higher education; a training system worthy contingent of higher education institutions; an effective system of preparation of students and evaluation of the quality of their knowledge and labor potential; a system of training for scientificpedagogical personnel and improving their qualification; assessment criteria of effectiveness and ability of educational institutions to provide quality knowledge
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RESOURCES OF RENEWABLE SOURCES OF ENERGY OF THE KRASNODAR REGION
Description
In the article, there were cited the resources of wind en-ergetic, hydroenergetic, solar energetic and biomass of the Krasnodar region
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SYNTHESIS OF MODULAR UNINTERRUPTED POWER SUPPLY SYSTEMS WITH INCREASED RELIABILITY
Description
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
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THE SYSTEM OF KNOWLEDGE ASSESSMENT AND RATING OF TESTING OF STUDENTS
Description
An important question is increasing objectivity in evaluation of current and residual knowledge of students on the subjects. Based on these assessments, teachers will adjust the work program and calendarthematic plan on discipline, forms and methods of teaching in order to ensure a high level of knowledge, allowing making necessary competence and skills of future specialists. The article proposes the evaluation system of students ' knowledge and determines their rankings, taking into account the qualifications of the teachers who taught their classes. Knowledge assessment might be defined as just one discipline, or as all the across disciplines for a semester, academic year and study period. The knowledge of students on discipline is estimated on the results of the test tasks based on current estimates obtained in a semester, and examination grades. We have reviewed the quality assessment system of students ' knowledge and determined their rating; it will increase the credibility of the evaluation. In addition, it increases the effectiveness of the educational process, since the evaluation of students ' knowledge and skills of teachers, will help heads of departments and deans to make decisions about the professional development of teachers, showed poor results
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