scholarly journals Evaluation of Functioning Quality of Local Electrical Systems by the Criterion Method Based on Markov Processes

2019 ◽  
pp. 169-172 ◽  
Author(s):  
Petro Lezhniuk ◽  
Vyacheslav Komar ◽  
Natalya Sobchuk ◽  
Olena Sikorska
Keyword(s):  
Markov Processes ◽  
Renewable Energy Sources ◽  
Network Development ◽  
Least Action ◽  
Electrical Systems ◽  
Principle Of Least Action ◽  
Intensive Development ◽  
Criterion Method ◽  
The Ideal

The article proposes to use of a combination of the criterion method and Markov processes to evaluate the quality of functioning of renewable energy sources (RES) in the form of integrated readiness characteristic of the electricity network with RES or a local electrical system (LES). This is possible throughthe analysis of the problems of ensuring the quality of electricity supply in the conditions of intensive development of RES and defined by the qualimetric characteristics of the electricity networks, which are important for the provision of quality electricity. This contribute the development of generalizedsolutions and network development strategies, especially when it comes to building RES. The components of the integral index are determined as the probability of matching the actual regime to the "ideal". The "ideal" mode is determined on the basis of the principle of least action and corresponds to the circuit diagram of the network formed by the r-scheme. The basis thus determined in this way reduces the subjectivity of both evaluations and decisions taken on the basis of it.

scholarly journals Advances in Power and Energy Systems

TecnoLógicas ◽  
2018 ◽  
Vol 21 (42) ◽  
pp. 9-11
Author(s):  
Carlos A. Ramos-Paja ◽  
Daniel González-Montoya ◽  
Adriana Trejos-Grisales ◽  
Sergio I. Serna-Garcés
Keyword(s):  
Renewable Energy Sources ◽  
Life Time ◽  
Electrical Energy ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Electrical Systems ◽  
Research Fields ◽  
Power And Energy Systems ◽  
Power And Energy

Processing electrical energy is one of the most important research fields in our society. So far, tremendous efforts have been made to improve the efficiency of each step in electrical systems: generation systems have been enhanced by introducing renewable energy sources and new control systems for conventional generators, losses have been reduced, the power quality of distribution and transmission systems has been increased, the life-time and state-of-health of energy storage devices have been extended, and sections of the power grid have been isolated for intelligent energy management.

scholarly journals Principle of Least Action in Models and Algorithms of Optimisation States Power System

2019 ◽  
pp. 173-176
Author(s):  
Petro Lezhniuk ◽  
Vira Teptya ◽  
Vyacheslav Komar ◽  
Olena Rubanenko
Keyword(s):  
Optimal Control ◽  
Power System ◽  
Electric Power ◽  
Active Power ◽  
Electric Power System ◽  
Optimal State ◽  
Least Action ◽  
Ideal State ◽  
Principle Of Least Action ◽  
The Ideal

The possibility and feasibility of applying the principle of least action (PLA) in the optimal control of the states of the electric power system (EPS) is demonstrated. The loss of active power and electricity was taken as the criterion of optimality. The algorithm for determining the optimal state of the EPS is presented. The peculiarity of it is that, in accordance with the PLA, the ideal state of the EPS is first determined, and then parametric constraints are taken into account. The ideal state of the system is characterized by the lowest possible losses, and taking into account active restrictions on the parameters translates the system to the optimal state. The losses increase depending on the heterogeneity of the system in the optimal state of the EPS.

An Efficient Hybrid Forecasting Approach for Wind Speed Time Series

2017 ◽  
Vol 7 (9) ◽  
pp. 13
Author(s):  
Bhargavi Munnaluri ◽  
K. Ganesh Reddy
Keyword(s):  
Neural Networks ◽  
Artificial Neural Networks ◽  
Wind Speed ◽  
Fossil Fuels ◽  
Renewable Energy Sources ◽  
Support Vector ◽  
Hybrid Forecasting ◽  
Artificial Neural ◽  
Future Utilization

Wind forecasting is one of the best efficient ways to deal with the challenges of wind power generation. Due to the depletion of fossil fuels renewable energy sources plays a major role for the generation of power. For future management and for future utilization of power, we need to predict the wind speed.  In this paper, an efficient hybrid forecasting approach with the combination of Support Vector Machine (SVM) and Artificial Neural Networks(ANN) are proposed to improve the quality of prediction of wind speed. Due to the different parameters of wind, it is difficult to find the accurate prediction value of the wind speed. The proposed hybrid model of forecasting is examined by taking the hourly wind speed of past years data by reducing the prediction error with the help of Mean Square Error by 0.019. The result obtained from the Artificial Neural Networks improves the forecasting quality.

An Analysis of On-Bord High-Voltage Converters of Single-Phase Alternating Current with Increased Miroelectric Power Factor

2020 ◽  
Vol 10 (10) ◽  
pp. 44-51
Author(s):  
Yury Yu. SKOROKHOD ◽  
◽  
Sehgey I. VOL’SKIY ◽  
Keyword(s):  
High Voltage ◽  
Single Phase ◽  
Input Current ◽  
Voltage Converter ◽  
Input Unit ◽  
Power Circuit ◽  
Electrical Systems ◽  
Static Converters ◽  
Technical Requirements

The power circuit arrangements of on-board high-voltage static converters fed from a 3000 V AC single-phase network that in the general case produce multi-channel AC and DC output voltages are considered. The basic technical requirements posed to such converters are formulated. The general structural diagram of high-voltage converters with improved electric power consumption quality is given. Possible power circuit arrangements for the high-voltage converter input unit based on single-phase input current correction devices are considered. A classification and criteria for comparative evaluation of the possible power circuit arrangements of these devices are proposed. The information presented in the article will be of interest for specialists engaged in designing on-board electrical systems involving high-voltage converters that must comply with strict requirements for the quality of consumed single-phase input current.

La Formación Continua y el Desarrollo de Competencias en los Docentes en Ejercicio del Nivel Secundario

2017 ◽  
Vol 1 (2) ◽  
Author(s):  
Leonor Alexandra Rodríguez Álava
Keyword(s):  
Teaching Practice ◽  
Training And Development ◽  
Middle Level ◽  
Teaching Skills ◽  
Practicing Teachers ◽  
Active Subject ◽  
Continuous Preparation ◽  
Analysis And Synthesis ◽  
The Ideal

Este artículo está encaminado a caracterizar el proceso de formación continua del docente del nivel medio en ejercicio asociado a la formación y desarrollo de sus competencias docentes, para lo que fueron utilizados métodos como   el análisis y síntesis, inducción y deducción, abstracción y concreción, la entrevista, la encuesta y  el cuestionario, donde a partir de sus resultados se  llega a la consideración de que la formación continua es la vía idónea para la formación y desarrollo de competencias docentes en los profesores en ejercicio, donde se debe asumir un modelo que propicie la reflexión sobre la propia práctica del docente, un clima de colaboración   y el profesor como sujeto activo de ese proceso.   Palabras claves: calidad educativa,   competencias docentes,   educador, estudio, preparación continua,  ABSTRACT   This article aims to characterize the process of education for teachers of middle level associated with exercise training and development of their teaching skills, for which methods were used as analysis and synthesis, induction and deduction, abstraction and concreteness, interview and questionnaire survey, where from their results leads to the consideration that the training is the ideal way for the formation and development of teaching skills in practicing teachers, where they must assume a model that encourages reflection on own teaching practice, a climate of collaboration and the teacher as an active subject of that process Keywords: quality of education, teaching skills, teacher, study, continuous preparation

On the Shoulders of Giants

2018 ◽  
Author(s):  
David D. Nolte
Keyword(s):  
Eighteenth Century ◽  
Robert Hooke ◽  
New Approach ◽  
Isaac Newton ◽  
Least Action ◽  
New Science ◽  
Principle Of Least Action ◽  
Parabolic Trajectory ◽  
Leonhard Euler ◽  
New Generation

Galileo’s parabolic trajectory launched a new approach to physics that was taken up by a new generation of scientists like Isaac Newton, Robert Hooke and Edmund Halley. The English Newtonian tradition was adopted by ambitious French iconoclasts who championed Newton over their own Descartes. Chief among these was Pierre Maupertuis, whose principle of least action was developed by Leonhard Euler and Joseph Lagrange into a rigorous new science of dynamics. Along the way, Maupertuis became embroiled in a famous dispute that entangled the King of Prussia as well as the volatile Voltaire who was mourning the death of his mistress Emilie du Chatelet, the lone female French physicist of the eighteenth century.

Humanism and the Human

2020 ◽  
Author(s):  
Joseph Winters
Keyword(s):  
Critical Theory ◽  
Michel Foucault ◽  
Karl Marx ◽  
Black Studies ◽  
Black Feminism ◽  
Working Through ◽  
A Site ◽  
The Ideal ◽  
Sylvia Wynter

This chapter engages humanism and its fundamental assumptions by working through critical theory, black feminism, and black studies. It contends that there is a tension at the heart of humanism—while the ideal human appears to be the most widespread and available category, it has been constructed over and against certain qualities, beings, and threats. To elaborate on this tension, this chapter revisits the work of authors like Karl Marx and Michel Foucault. Marx acknowledges that the human is a site of conflict and antagonism even as his thought betrays a lingering commitment to progress and humanism. Foucault goes further than Marx by underscoring the fabricated quality of man and the ways in which racism functions to draw lines between those who must live and those who must die. In response to Marx and Foucault’s tendency to privilege Europe, this chapter engages black feminism and Afro-pessimism—Sylvia Wynter, Hortense Spillers, and Frank Wilderson—who show how the figure of the human within humanism is defined in opposition to blackness.

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