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An analysis is made of the formation of electricity consumer groups according to existing criteria and it is proposed to use indicators that characterize consumption methods for this task. It has been determined that increasing the criteria for differentiation of electricity consumers is a precondition for the formation of the new market environment.
Modem measurement systems being implemented in power systems worldwide provide the unprecedented possibilities of analyzing the electromechanical transients and especially the oscillatory processes. As the communication and data processing technologies are being advanced at a quick pace, the possibilities of detecting and characterizing the low-frequency oscillations, which may threaten the power...
Since the start of 2000th many methods which allow estimating the actual impact of imbalanced load into the voltage imbalance at the substation point of common coupling have been created. Most of these methods use measurement data for creating an equivalent electrical scheme which includes a foreign utility, a substation and a number of consumers. Using that scheme allows to estimate the impact of...
In this days, the necessity of using wind generators to produce energy and environmental issues, show that increasing the importance of study between researchers in this field. Since the penetration of wind power in electric power system is increasing greatly, it is urgent to study the impact of wind power on the dynamic stability of electric power system. In this paper, the dynamic behavior of the...
This paper is aimed at investigating the steady state analysis of a grid connected PMSG wind turbine in fixed and variable speed using MATLAB/SIMULINK. The case studied is Zafarana, Egypt. The average values of wind speed of month and day of Zafarana region is obtained from NASA site. Zafarana region has the highest wind speed which is greater than 12 m/sec. The transient analysis is investigated...
In medium voltage distribution network covered conductors are used to improve reliability and reduce interruptions and faults caused by snow, ice, storm and fallen trees; however covered conductors are more vulnerable than bare conductors against lightning caused burndown, therefore arc protection devices should be used. To study covered conductor overhead lines in case of direct lightning strike...
For more than half a century of exploitation of controlled electric drive systems built on semiconductor elements, thyristor converter devices proved to be the most reliable and cost-effective systems. Thyristor voltage converters (TVC) are used as soft starters (MSS) for powerful asynchronous electric drives and are promising for use as systems with an economizer and for the development of devices...
Generation adequacy indices (GAI) calculations are performed not only for electrical power system development problems but also for on-line control problems. Liberalization of power and energy market along with increased focus on renewable energy sources, which is motivated by both ecological and economical incentives, has led to comprehensive changes in power systems. Practically, the main mathematical...
This study is dedicated to solve a turn recognition task by Convolutional neural network (CNN) application. System proposed in this paper is a part of the big research aimed at system, for the safe transportation process, development. Road turn is an important parameter in road circumstances analysing, collision possibility calculating and decision making for the accident prevention. System structure...
In this paper discussed how to determine synchronous generator parameters by using Matlab/Simulink program through load rejection test, and also show how to calculate the fundamental parameters which are important in the synchronous generator.
This paper describes the mathematical modeling of the high-output magnet-free synchronous reluctance motor (SynRM) with rated power 1100 W, rated speed 3000 rpm, frame size 63 and IE4 efficiency class. The weight of the designed SynRM class is almost 50% less than the weight of the serially produced induction motor of IE3 efficiency class at the same rated power and speed. The SynRM prototype is being...
With the increase in distributed generation, the demand-only nature of many secondary substation nodes in medium voltage networks is becoming a mix of temporally varying consumption and generation with significant stochastic components. Traditional planning, however, has often assumed that the maximum demands of all connected substations are fully coincident, and in cases where there is local generation,...
The paper aims at describing observables used in small signal stability assessment based on Energy-Sorted Prony's method focusing at area and inter-area level of the power system. Presented research studies are based on a new way of power system operation, namely Web-of-cell concept, devised within FP7 IRP ELECTRA. The project is aiming at ensuring conceptual E-market design and future power system...
This paper describes the pilot realization of virtual laboratory using MATLAB and PowerWorld environments for the undergraduate students in the field of Power Systems. A description of laboratory works, tasks and visualization of the performed models is given. The preference of using software type education rather than hardware one has the opportunity for flexibility of models. The first year experience...
The integration of Renewable energy sources (RES) into the traditional electric grid infrastructure is a challenging task due to their intermittent nature as well as the technical and non-technical complexities. This paper presents the impacts of large scale Photovoltaic (PV) penetration into the IEEE 39-bus test system. The modeled PV plants are integrated at suitable locations to study the impacts...
This paper describes the mathematical model and the experimental study of the magnet-free synchronous reluctance motor (SynRM) of IE5 efficiency class (rated power is 1500 W, rated speed is 3000 rpm). Also the IE5 SynRM has been compared to the serially produced induction motor (IM) of IE3 efficiency class. The measured rated efficiency of the developed IE5 SynRM is 90.7 % which is significantly greater...
This paper proposes modified dq control strategy that improves the dynamic response of the grid-connected inverter compared to the conventional approach. The idea is described and validated by means of simulation results. The transient time in traditional approach is 10 times slower than in the modified inverter with the same regulator parameters. The THD of the output current is almost the same.
The investigation of AC and DC electrical field impact on combustion processes was performed by various researchers. These studies didn't take into account excess air in flue gases. The results of these experiments do not always correlate, due to different experiment conditions and experiment equipment variations. The observed results of the electrical field impact on the combustion process depends...
The majority of modem devices become smart and programmable. It simplifies their use, but complicates development. A variety of areas of the electric drive application and constant improvement of it's elements create problems in education of this specialty. On the example of Department of Electric Drives of Moscow Power Engineering Institute ways of their decision are discussed.
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