name
Grigorash Oleg Vladimirovich
Scholastic degree
•
Academic rank
professor
Honorary rank
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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
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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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ABOUT THE NEED TO CHANGE THE BURDEN STANDARDS FOR PEDAGOGICAL WORK OF FACULTY STAFF
DescriptionThe article reveals the content of pedagogical work activities for teaching staff in the main activities of the Department (academic, educational, methodical, scientific and organizational-methodical work). We have offered a rational standard time for their quality execution, allowing improving the quality of training of university graduates. It is proposed to consider additional classes and consultations in the burden time of teachers, as well as the norms of time for preparation for publishing educational and scientific literature, development of training, methodological, logistical and organizational-methodical work. It is shown, that the participation of teachers in researches and development with the aim of earning money for the University reduces the level of the educational process. To improve the quality of training of students, we have offered a number of key measures that needed to be organized by the Ministry of education and science of the Russian Federation, and also, by employees of the administrative apparatus of universities
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THE METHOD OF PREPARATION OF FIRSTYEAR STUDENTS TO UNIVERSITIES
DescriptionThe rapid pace of global scientific and technological progress, which is the main engine of the economy, demands for higher education, the purpose of which is to prepare highly educated specialists – the intellectual potential of Russia. It is known, that technical and technological skills play an important role in scientific and technical progress; ultimately, the economic development of the country and the welfare of the population depends on it. The selection by the criterion of professional suitability is the basis for building a decent contingent of firstyear students of technical universities. The article describes the disadvantages of the known and the new method of selection, by qualifications, based on the evaluation of the implementation of the students tests on topics studied disciplines close to engineering. The article reveals content of the main stages of pre-University training in secondary educational institutions. The proposed method of selection based on professional suitability, and the system of training of contingent in secondary schools and colleges, created on the basis of higher educational institutions, will significantly improve the quality of training of specialists of technical and technological directions for universities
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METHODOLOGY OF EXPERIMENTAL RESEARCHES
DescriptionToday, the questions of accelerated development of science are essential; it has become a real productive force, the most powerful factor influencing the level of scientific and technical progress. The most important part of the research work is experimental studies. The article reveals the methodology of experimental research involving the content of laboratory and industrial research, main stages, as well as graphic presentation and the analysis of the results of studies; as well as the methodology for the general analysis of theoretical and experimental studies, the sequence of introduction of the results of the research and criteria for evaluating their effectiveness. The main issues of the methodology of experimental researches discussed in the article will increase the effectiveness of scientific and research work of scientific collectives of organizations and companies
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CLASSIFICATION AND BASIC METHODS OF CONSTRUCTING SOLAR POWER PLANTS
DescriptionThe high speed of solar energy development in the modern world allows us to assert that in the near future it will become one of the main sources of electricity. The authors describe a classification of solar power plants, which can be of two types – thermodynamic and photovoltaic, as well as the features of design and operation of these plants. There is a structural and schematic solution of autonomous solar power stations and ones operating in parallel with the external power grid. The features of their design and operation, including the main advantages and disadvantages were shown. It is shown that to improve the reliability, including uninterrupted power supply, a promising direction is the development of combined systems which in addition to the solar power plant may use wind power, gas or diesel power, etc. In addition, such stations may provide power from the external power supply. We have given one of the variants of structural designs of combined systems of energy and disclosed recommendations for the design of energy-efficient combined systems of power supply, made using renewable and conventional sources of electricity. The final version of the combined system of electricity supply and the degree of participation of traditional and renewable energy sources in electricity production is determined on the basis of the analysis of the energy balance and electromagnetic compatibility of the main functional elements of the system
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SOLAR POWER SYSTEMS WITH GUARANTEED POWER SUPPLY
DescriptionThe article discusses the structural schematics of solar energy systems, providing guaranteed power supply to electricity consumers with priority for consumers of the 1st category. The work describes main functions performed by modern energy systems. It is shown that nowadays solar power systems of uninterruptable power supply are classified into three types: independent; hybrid (combined); intellectual. We have given the structural scheme of solar systems power systems of uninterruptable power supply and the features of their work. The article describes a monitoring system, carrying out functions of control and measurement of parameters of the power system depends on its performance. The economic performance of a solar power system has been influenced essentially by the cost of solar and accumulator batteries. The principal technical characteristics of modern solar and regular batteries of the best companies were compared. We have also given recommendations for improving the operational characteristics of solar energy systems of guaranteed power supply, in which special attention is paid to technical characteristics of the main functional elements of the system, including electromagnetic compatibility
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RESEARCH STAFF TEAMS OF A DEPARTMENT
DescriptionPerspectives of science in high schools were always defined by prospects of development of scientific teams. The author proposes to divide (depending on the contents of research targets) unities of the research process and the results of research teams of the Department into three categories: a scientific group, a scientific school and a leading scientific school. Research teams are characterized by not only quantitative and qualitative composition, but the annual results. We reveal functional duties of leaders of research teams and the head of the Department for their effective management. One of the main tasks of the Department is to create conditions for the disclosure of scientific and creative abilities of students. The article describes general concepts and the content of scientific researches, including the formulation of themes, goals and objectives of the research, as well as the basics of research methodologies required for students in conducting the research work. The structure of research groups of the Department, the content of their work, the main functional responsibilities of heads of scientific disciplines and the head of the Department, basics of scientific research methodology discussed in the article, will increase the organization's effectiveness and the efficiency of R & D Department
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AUTONOMOUS HYBRID POWER PLANTS
DescriptionThe article discusses the features of design and operation in the different modes of functioning of autonomous hybrid power plants based on renewable and traditional energy sources. We have given a structural scheme of such a plant. It is shown that the algorithm of the system in the autumn-winter period should be adjusted according to the monthly monitoring; and standby generator of independent source can be run at a deeper discharge of batteries. It is known that the most expensive and the weakest link in the solar PV plants is rechargeable battery. In addition, the larger the number they have in the system, the more complicated the fulfillment of all conditions of proper operation is. We have proposed to extend the lifetime of batteries through the use of passive balancing, which allows to increase the reliability of operation and reduce the cost. It is shown that a real possibility of improving the technical and economic performance of autonomous hybrid power plants is their execution on the basis of solar photovoltaic power plants. We have also discussed the features of construction and operation of hybrid power plants, which will increase the efficiency of preliminary works on development of high-performance structural circuit design of the stations
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Description
The article reveals the basic principle of stabilizing the DC voltage, providing automatic control of electrical devices and electrical equipment, control systems, control and protection, etc. There are functional diagrams (operated and promising) of DC voltage stabilization with a device included in the input and output power circuits of the rectifier, and a new structural solution to a functional circuit of the rectifier made of two controllable power electronic devices and transformer with midpoint. The article lists peculiarities of the circuits of the voltage regulators and their main advantages and disadvantages. We have reviewed functional diagrams of existing and new solutions of the stabilizers and the characteristics of their work; it will increase the effectiveness of pre-project works on the development of stabilizers of the DC voltage with improved performance characteristics. This article might be useful for post-graduates and research workers who are involved in the development of DC voltage stabilizers
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EVALUATION OF THE QUALITY OF EDUCATION OF STUDENTS AND EFFECTIVENESS OF TEACHERS
DescriptionModern 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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THE METHOD OF CALCULATION OF FILTERS FOR STATIC CONVERTERS OF ELECTRIC POWER
DescriptionOne of the important issues in the design of static converters of electric power, i.e. rectifiers and inverters, is to calculate the parameters of the output and the input filters. Output filters are designed to improve the quality of output voltage of inverters, and input filters are created to reduce ripple of the input voltage of the converter that occur when commuting power semiconductor devices, and smoothing fluctuations of the current consumed from the power supply. The complexity of analytical description of the harmonic composition of the output and the input of the voltage rectifiers and inverters makes it difficult to develop some accurate methods for calculating the parameters of their filters. At the same time, considering the discreteness of the number of possible parameters of real elements of the filter, the practical value of such techniques with a high analysis accuracy of the harmonic components is negligible. In this article, we suggest the technique of the simplified calculation of output and input filters for passive LC filters rectifiers and inverters. At the same time, the practice of mathematical modeling and design of transducers has shown that the calculations of the filter parameters for rectifiers and inverters are not significantly different from each other. Therefore, the analytical expressions for calculation of the filter parameters of rectifier used ripple coefficient, and if necessary the calculation of the filters of the inverter, instead of the pulse number in the formula can be substituted with the value of the harmonic; in addition, we have also taken into account the value of the load power factor