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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TO THE QUESTION OF IMPROVING THE QUALITY OF DISSERTATIONS AND OPTIMIZATION OF DISSERTATION COUNCILS
Description
It is known, that the development of fundamental and applied sciences, besides research institutes, are the universities. Integration of scientific researches of higher school into production occurs in many forms and can be largely determined by the quality of the training, including defense of thesis, research and teaching staff of the university. The article criticized the Ministry of education and science of the Russian Federation, and the higher attestation Commission of Russian Academy of Sciences aimed at improving the quality of work of dissertation councils and of the level of theses, based on the optimization of the network of dissertation councils, including their union, raising the level of members of dissertation councils. We have suggested a number of measures and specific requirements for the content of dissertations and supervisors of theses, official opponents of the thesis councils and their members, employees of the HAC. Introduction of considered proposals concerning increasing the level of theses into practice of work of dissertation councils, one set of measures will allow to optimize the network of dissertation councils and to improve the quality of their work
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TO THE QUESTION OF CALCULATION OF THE ENERGY POTENTIAL AND COST-EFFECTIVENESS OF WIND ENERGY
Description
This article discusses the basic analytical expressions for calculation the energy potential and cost-effectiveness of wind energy
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CLASSIFICATION AND BASIC METHODS OF CONSTRUCTING SOLAR POWER PLANTS
Description
The 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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Description
In the article, the main shortcomings of organizational and methodical work of the higher school reveal, which interfere with effective work of the chair – the main division of the higher education institution which is carrying out training of specialists for various branches. The complex of the actions directed on quality improvement of preparation of students in the engineering directions is offered
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CONVERTERS OF UNINTERRUPTIBLE POWER SUPPLY WITH IMPROVED PERFORMANCE
Description
The article discusses structural schematics power circuits and voltage stabilization systems of converters with improved operational and technical characteristics
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THE CONCEPT OF UNINTERRUPTED POWER SUPPLY SYSTEMS
Description
We have revealed the main reasons for interruptions in power supply to consumers of electricity. To improve the reliability and the efficiency of power supply for responsible consumers, we have proposed to develop energy efficient combined energy-saving systems for uninterrupted power supply with use of renewable energy sources. The article lists major principles of the development of such systems; it shows the necessity of constructing a generalized schema that contains the possible types and the sources of electric power converters. It also reveals the modern requirements to systems of uninterrupted energy supply. To improve the operational and technical characteristics of the uninterruptible power supply, it has been proposed to use a new circuitry that includes a contactless power generators, the direct frequency converters used to stabilize the voltage and frequency of the current generators of wind turbines, static converters made with the use of single-phase transformers with rotating magnetic field, universal static converters that can operate in the regimes of known types of converters. The article presents features of the modular construction of systems of uninterrupted energy supply and optimization of their structural decisions on key performance criteria. It shows the algorithm of synthesis of structural designs of combined systems of uninterrupted power supply. An important step for further research with the aim of improving operational and technical characteristics of the combination of uninterrupted power supply systems is the mathematical modeling of physical processes in power circuits of the system in both normal and emergency modes of operation
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Description
This article presents the methods for estimating the quality of individual training of students, clusters and classes, as well as the effectiveness of the training activity of academic teaching staff
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METHODOLOGY TO EVALUATE THE EFFECTIVENESS OF THE FACULTY AND THE DEPARTMENT
Description
In the article we consider the technique of evaluating the performance of the faculty and the department for educational, methodical, scientific research and the development of material and technical base
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METHOD OF PLANNING OF TRAINING LOAD FACTORED IN RESULT OF WORK OF TEACHERS
Description
This article proposes a method of planning of academic teaching staff training load based on teaching and guiding and research work in the accounting period, which allowing to increase the performance indicator
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THE METHOD OF CALCULATION OF FILTERS FOR STATIC CONVERTERS OF ELECTRIC POWER
Description
One 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
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