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
-
THE SYSTEM OF TRAINING OF HIGHER PROFESSIONAL EDUCATION
Description
Proposed in the article system of training, aimed at improving the educational institutions, will allow radically improve the quality of training of higher professional education
-
SYSTEMATIC MONITORING OF THE CLASSES – AN IMPORTANT ASPECT OF THE QUALITY OF TRAINING STUDENTS
Description
The article considers the peculiarities of the management of monitoring visits to classes faculty by the head of the chair; we have also proposed criteria and indicators for assessing their quality
-
SOLAR POWER SYSTEMS WITH GUARANTEED POWER SUPPLY
Description
The 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
-
THE METHOD OF PREPARATION OF FIRSTYEAR STUDENTS TO UNIVERSITIES
Description
The 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
-
METHODS FOR SYNTHESIZING THE OPTIMAL STRUCTURE OF AUTONOMOUS SYSTEMS FOR RENEWABLE
Description
The article describes the methods of synthesis of optimal structural schematics of autonomous power supply systems, made using renewable energy sources, for several performance criteria
-
VOLTAGE REGULATORS ASYNCHRONOUS GENERATORS
Description
A promising is currently the use of asynchronous generators with capacitive excitation as a source of electricity in stand-alone power systems. Drive asynchronous generators may exercise as a thermal engine and wind wheel wind power plant or turbines of small hydropower plants. The article discusses the structural and schematics of voltage stabilizers and frequency of asynchronous generators with improved operational and technical specifications. Technical novelty of design solutions of the magnetic system and stabilizers asynchronous generator of electricity parameters confirmed by the patents for the invention of the Russian Federation. The proposed technical solution voltage stabilizer asynchronous generators, can reduce the weight of the block capacitors excitation and reactive power compensation, as well as to simplify the control system power circuit which has less power electronic devices. For wind power plants it is an important issue not only to stabilize the voltage of the generator, but also the frequency of the current. Recommend functionality stabilizer schemes parameters of electric power made for direct frequency converters with artificial and natural switching power electronic devices. It is also proposed as part of stabilization systems use single-phase voltage, three-phase transformers with rotating magnetic field, reduce the level of electromagnetic interference generated by power electronic devices for switching, enhance the efficiency and reliability of the stabilizer.
-
VOLTAGE REGULATORS AND FREQUENCY OF CURRENT OF ASYNCHRONOUS GENERATORS OF WIND POWER INSTALLATIONS
Description
In the article we have considered the technical solutions of voltage regulators and the frequency of current of the asynchronous generators of the wind power installations executed with the help of the direct frequency transformers. The comparative analysis of them has been carried out as well
-
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
-
VOLTAGE REGULATORS OF SYNCHRONOUS GENERATORS
Description
Synchronous 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
-
STABILIZERS PARAMETERS OF ELECTRIC POWER WIND POWER INSTALLATIONS
Description
The article discusses the new structural schematics stabilizers of voltage and frequency contactless power generators wind power installations
pdf 209.825kb
doc 209.825kb