Calculation of steady non-sinusoidal modes and electric power losses in complex electrical networks

2016 ◽  
Author(s):  
N. N. Kharlov ◽  
V. S. Borovikov ◽  
V. Ya. Ushakov ◽  
E. V. Tarasov ◽  
L. L. Bulyga
Keyword(s):  
Electric Power ◽  
Electrical Networks ◽  
Power Losses

scholarly journals Influence of resistance of contact units of switching devices on the electric power losses in shop networks of low tension

2019 ◽  
Vol 124 ◽  
pp. 02013 ◽  
Author(s):  
D. D. Micu ◽  
I. V. Ivshin ◽  
E. I. Gracheva ◽  
O. V. Naumov ◽  
A. N. Gorlov
Keyword(s):  
Electric Power ◽  
Low Voltage ◽  
Technical Condition ◽  
Electrical Networks ◽  
Power Losses ◽  
Switching Device ◽  
Low Tension ◽  
Switching Equipment ◽  
Voltage Switching ◽  
Switching Devices

This paper presents calculation of resistance of tightening contact joints of switching devices. It allows considering the technical condition of low-voltage switching equipment and to specify energy emitted in the switching device in the mode of electrical networks operation is presented in the article.

scholarly journals Predicting the influence of the non-sinusoidal network mode on power transformers

2019 ◽  
Vol 114 ◽  
pp. 04005
Author(s):  
Ngo Van Cuong ◽  
Lidiia I. Kovernikova
Keyword(s):  
Service Life ◽  
Electric Power ◽  
Power Quality ◽  
Electrical Equipment ◽  
Operating Conditions ◽  
Transformer Oil ◽  
Power Transformers ◽  
Electrical Network ◽  
Electrical Networks ◽  
Current Harmonics

The parameters of electrical network modes often do not meet the requirements of Russian GOST 32144-2013 and the guidelines of Vietnam. In the actual operating conditions while there is the non-sinusoidal mode in electrical networks voltage and current harmonics are present. Harmonics result in overheating and damage of power transformers since they cause additional active power losses. Additional losses lead to the additional heat release, accelerating the process of insulating paper, transformer oil and magnetic structure deterioration consequently shortening the service life of a power transformer. In this regard there arises a need to develop certain scientific methods that would help demonstrate that low power quality, for instance could lead to a decrease in the electrical equipment service life. Currently we see a development of automated systems for continuous monitoring of power quality indices and mode parameters of electrical networks. These systems could be supplemented by characteristics calculating programs that give out a warning upon detection of the adverse influence of voltage and current harmonics on various electrical equipment of both electric power providers and electric power consumers. A software program presented in the article may be used to predict the influence of voltage and current harmonics on power transformers.

scholarly journals Effects of Erratic and Epileptic Electric Power Supply in Nigerian Telecommunication Industry: Causes and Solutions

2019 ◽  
Vol 2 (2) ◽  
pp. 29-35
Author(s):  
C. Agbeboaye ◽  
F. O. Akpojedje ◽  
B. I. Ogbe
Keyword(s):  
Electric Power ◽  
Significant Role ◽  
Power Supply ◽  
Growth And Development ◽  
Distribution Network ◽  
Telecommunication Industry ◽  
Power Losses ◽  
Electric Power Supply

The issue of erratic and epileptic power supply in Nigeria Electricity Company is as old as the country itself. This is not unconnected to some factors such as: inadequate power generated in the national grid, electric power losses in the distribution network, government instability and unstable power reform policies, to mention but a few. The effects of erratic and epileptic power supply have been a major challenge to every sector in Nigeria especially the telecommunication industry. The telecommunication industry plays a significant role in the growth and development of every nation. Hence, this paper aims at critically investigating the causes and effects of erratic and epileptic electric power supply in Nigerian telecommunication industry. More so, the paper suggested and recommended ways to curb and enhance the current erratic and epileptic power situation in the country in order to boost the productivity of telecommunication industry and other sectors as well.

scholarly journals ON THE MANAGEMENT OF URBAN ELECTRIC NETWORKS IN THE CONDITIONS OF THE SMART GRID

2018 ◽  
Vol 61 (1) ◽  
pp. 15-27 ◽  
Author(s):  
M. А. Fursanov ◽  
A. A. Zalotoy
Keyword(s):  
Smart Grid ◽  
Electric Power ◽  
Power Transmission ◽  
Electrical Networks ◽  
Electric Networks ◽  
Urban Networks ◽  
Theoretical Criterion ◽  
Active Power Losses ◽  
And Control ◽  
The City

The issues of prospective operation of the city electric networks in the conditions of the MART GRID, which will be quite different as compared to the traditional understanding and approaches, are under consideration. This requires the selection and application of appropriate analytical criteria and approaches to assessment, analysis and control of the networks. With this regard the following criteria are recommended: in a particular case – the optimal (minimal) technological electric power consumption (losses), while in general – economically reasonable (minimal) cost value of electric power transmission. It should be also borne in mind that contemporary urban networks are actively saturated with distributed sources of small generation that have radically changed the structure of electrical networks; therefore, account for such sources is an absolutely necessary objective of management regimes of urban electric networks, both traditional and in associated with the SMART GRID. A case of the analysis and control of urban electric 10 kV networks with distributed small sources of generation has been developed and presented according to the theoretical criterion of minimum relative active power losses in the circuit as a control case. The conducted research makes it possible to determine the magnitude of the tolerance network mode from the point of the theoretical minimum. 

scholarly journals Finding of the rational approach at the decision of a compensation in high-voltage networks

2009 ◽  
Vol 25 (25) ◽  
pp. 65-68
Author(s):  
G. Georgiev ◽  
I. Zicmane ◽  
E. Antonov
Keyword(s):  
Computational Model ◽  
High Voltage ◽  
Electrical Power ◽  
Rational Approach ◽  
Electrical Networks ◽  
Power Losses ◽  
Permissible Range

Finding of the rational approach at the decision of a compensation in high-voltage networksThe aim of the present work is to find a computational model, sufficiently simplified for practical use which determines the sensitivity of the complex high-voltage electrical networks when switching compensatory powers. We show how this model can be used as a basis for creating practical criteria for a one-valued choice in the two situations. First, switching the compensatory power does not lead to leaving the permissible range of voltage. In this case the power which minimizes the power losses is used. Second, the compensatory power is switched in order to return the voltage to the permissible range. Then that compensatory medium is chosen which is sensitive enough in addition to causing the minimal increase in electrical power losses.

scholarly journals Flexible Tranmission Elements for Grid Optimization

2021 ◽  
Vol 21 (2) ◽  
pp. 53-61
Keyword(s):  
Power Systems ◽  
Electric Power ◽  
Emergency Operation ◽  
Power Losses ◽  
Current Transmission ◽  
Before And After ◽  
Grid Optimization ◽  
Flexible Alternating Current Transmission ◽  
Active Power Losses ◽  
The Stability

The article dwells upon optimizing, reduction of losses in, and improving the stability of grids by implementing devices that affect the parameters and power flows in a grid. State-of-the-art technology for better control is crucial for the development of electric power systems. FACTS technologies or flexible alternating current transmission systems, essentially transform the grid from a passive electricity transport into a device that actively controls the grid parameters. The article analyzes the development of a 500/220/110 kV grid that uses parameter-affective devices: SVC, BSK, LCD. Steady-state parameters, active power losses, and electric power losses were calculated for a year before and after the devices were deployed. Each device was therefore analyzed for effectiveness. The parameters of the SVC-equipped 500/220/110 kV grid were calculated for emergency operation with the 500 kV line being offline. Thus, the paper also analyzes the emergency performance of the SVC.

Sign in / Sign up

Export Citation Format

Share Document