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
—
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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VOLTAGE REGULATORS OF SYNCHRONOUS GENERATORS
DescriptionSynchronous generators are the primary source of electrical power autonomous electrosupply systems, including backup systems. They are also used in a structure of rotating electricity converters and are widely used in renewable energy as part of wind power plants of small, mini and micro hydroelectric plants. Increasing the speed and the accuracy of the system of the voltage regulation of synchronous generators is possible due to the development of combined systems containing more stabilizers. The article illustrates the functional schemes of circuit voltage stabilizers and frequency synchronous generators (with electromagnetic excitation and permanent magnet excitation) and describes the features of their work, including two and three-aggregate rotating converters of electricity used in uninterruptible power supply systems. To improve the technical characteristics of the system of stabilization we have proposed functional solutions for stabilizers of synchronous generators made on the base of direct frequency converters and using a transformer with a rotating magnetic field. To improve the reliability of and to improve the operational characteristics of the autonomous independent sources of electricity we suggest creating the main functional blocks and the elements of the stabilization system in a modular way. The functional circuit solutions of voltage regulators of synchronous generators and the characteristics of their work considered in the article, are able to improve the efficiency of pre-design work in the development of new technical solutions for stabilizing the voltage and the frequency in synchronous generators of electrosupply autonomous systems
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TO THE QUESTION OF IMPROVING THE QUALITY OF DISSERTATIONS AND OPTIMIZATION OF DISSERTATION COUNCILS
DescriptionIt 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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ABOUT INCREASING THE PRESTIGE OF HIGHER TECHNICAL PROFESSIONAL EDUCATION IN RUSSIA
DescriptionThe article elucidates reasons for the falling prestige of higher technical professional education in Russia and based on their analysis we propose measures aimed at raising the status of technical specialists. These activities include: development of a strategic plan of development of higher professional education, a system of vocational guidance of graduates of secondary educational institutions; improvement of quality of preparation of scientific-pedagogical staff and development of effective system of training of teachers; the quality of the educational process and development of effective system of training of graduates; development of objective criteria for assessing the effectiveness of universities; development of a system of Patriotic education of students of secondary and higher educational institutions; increase of salaries of specialists, influencing the country's economic development, the status and prestige of the profession of high school teacher. It is necessary to develop a strategic plan for the development of higher professional education urgently since the first part of young professionals will be ready only after 4 years. Nevertheless, retraining and advanced training of specialists of technical and technological disciplines needed for the development of modern techniques and technologies, including foreign ones, we can start today. The implementation of the considered measures will allow to raise prestige of higher technical professional education and quality training of students
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TO THE PROSPECTS OF DEVELOPMENT OF THE EDUCATION SYSTEM IN RUSSIA
DescriptionA strategic task, which will accelerate the development of the economy is the reform of the education system, which has to be focused on improving the quality of training of graduates in secondary and higher educational institutions. The article describes the main causes of low quality of graduates of schools and universities in our country. The author proposes a complex of organizational and methodical actions, implementation of which will lead to a significant improvement of quality of preparation of graduates of secondary and higher educational institutions. Among these activities we might highlight: developing a strategic plan for the development of the education system, professional standards for employees of the administrative apparatus of education, the nomenclature of the main structural divisions of educational institutions of system of training personnel for universities, the system of training of specialists of the highest level of quality assessment of students ' knowledge and their labor potential, the system of training scientificpedagogical personnel and improving their qualifications, passports, graduates of secondary and higher educational institutions and certificates of qualification of teachers, teachers and employees of the administrative apparatus of the education sector, the system of Patriotic education of students of secondary and higher educational institutions, evaluation criteria, efficiency and the ability of educational institutions to give quality knowledge. Prerequisite to achieve high results in educational activities is to raise the status and the prestige of a teacher of educational institutions
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THE SYSTEM OF KNOWLEDGE ASSESSMENT AND RATING OF TESTING OF STUDENTS
DescriptionAn 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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THE NEED FOR THE USE OF RENEWABLE ENERGY SOURCES
DescriptionThe article reveals main reasons for developing tendencies to the using of new types of energy, which are limited supply of traditional fuels and environmental problems associated with its processing. It is shown that new forms of energy plays an important role in the energy supply of many countries of the world, and in the future they can become the main sources of energy to meet the growing needs of the global economy. We reveal main reasons of the increasing interest in renewable energy, and we show the obvious prospects of their use, due to two factors. First, according to experts, the global reserves of traditional fuels are limited, and secondly, this was evidenced by the investments of leading countries in this promising industry. The article lists reasons for the need for the use of renewable energy sources in Russia. Increased consumption of natural resources has become a real threat to the security of the life of human society. The basis of solving modern social and environmental problems is a transition to a regulated process of safe use of natural energy potential to meet the vital needs of people not only in the coming decades, but in the long run. It is concluded, that the determining condition for the development of the human civilization at present and in the future would be the level of natural resources which ensures the needs of the population without making harm to the environment
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FREQUENCY CONVERTERS WITH IMPROVED PERFORMANCE
DescriptionIn 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 CONCEPT OF UNINTERRUPTED POWER SUPPLY SYSTEMS
DescriptionWe 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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THE RESULTS OF THE REFORM OF THE EDUCATION SYSTEM IN RUSSIA
DescriptionOne 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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ABOUT INCREASE OF WORK EFFICIENCY OF THE DEPARTMENT
DescriptionThe main structural units of the University are departments; the results of their work influence the quality of knowledge, skills and competence of graduates and the image of the University. The article reveals the reasons of unproductive interaction of the departments with divisions, providing educational process; it also discusses suggestions that will improve the performance of the main indicators of assessment of the efficiency of activities of the University. It is shown, that a systematic approach is the basis in the organization of work of structural divisions of the University, but it is difficult to implement, if managers and supervisors do not have authority. To improve the quality of graduates and their demand in the labor market, it requires exempting the Department from administrative work. These functions can be redirected to the management, departments and services with modern electronic information processing system. To achieve high results in training in-demand graduates is possible when the offices and the departments will work as a team with the lecturers, in cooperation and understanding