scholarly journals The peculiarities of power conservation and energy efficiency in power supply systems of industrial enterprises

2020 ◽  
Vol 1614 ◽  
pp. 012027
Author(s):  
Yu V Bebikhov ◽  
A S Semenov ◽  
A N Egorov ◽  
M A Glazun ◽  
O V Fedorov
Keyword(s):  
Energy Efficiency ◽  
Power Supply ◽  
Power Conservation ◽  
Industrial Enterprises ◽  
Supply Systems

scholarly journals Reliability assessment of power supply systems with powerful nonlinear loads

2020 ◽  
pp. 26-34
Author(s):  
Yu.A. Papaika ◽  
O.G. Lysenko ◽  
A.V. Bublikov ◽  
I.G. Olishevskiy
Keyword(s):  
Energy Efficiency ◽  
Power Supply ◽  
Electromagnetic Compatibility ◽  
Load Capacity ◽  
System Capacity ◽  
Nonlinear Loads ◽  
Nonlinear Load ◽  
Industrial Enterprises ◽  
Distribution Laws ◽  
Supply Systems

Purpose. To substantiate the expediency of applying distribution laws to model the reliability of power supply systems with powerful nonlinear loads. Methodology. Application of exponential and normal distribution laws, and Weibull's law. Findings. In a comprehensive assessment of the problem of electromagnetic compatibility and the development of multicriteria parameters of energy efficiency of power supply systems of industrial enterprises, it is most appropriate to use the reliability of the elements that are mathematically described by the Weibull distribution. At the same time, the results of modeling of typical electrical modes and variations of substitution schemes of enterprises showed the sensitivity of reliability indicators to changes in power system capacity. Originality.  New theoretical foundations for research in modern power supply systems with increasing nonlinear load capacity have developed the scientific basis for analysis and synthesis of energy processes in multiphase electrical systems and propose methods of correction taking into account the complex action of sources of electromagnetic interference. And also to offer methods of estimation of their influence on reliability and efficiency of work of the basic electrotechnological equipment. Practical value.  The possibility of applying the obtained results to assess the reliability of power supply systems with powerful nonlinear loads is substantiated. The necessary accuracy and reliability of the decision at the levels of random events, quantities and processes is provided. The mathematical apparatus for the analysis of the main indicators of reliability in the presence of non-sinusoidal voltage is given. Conclusions are made on the adequacy of the calculation results at different stages of electricity distribution. It is shown that the simultaneous optimization of reliability and voltage quality are components of a complex scientific problem of ensuring energy efficiency of electrical networks in the implementation of decentralized models of the energy system.

Study of power transformer loading in rural power supply systems

2021 ◽  
Vol 13 (4) ◽  
pp. 282-289
Author(s):  
I. V. Naumov ◽  
D. N. Karamov ◽  
A. N. Tretyakov ◽  
M. A. Yakupova ◽  
E. S. Fedorinovа
Keyword(s):  
Energy Efficiency ◽  
Power Supply ◽  
Rural Areas ◽  
Power Transformer ◽  
Electric Energy ◽  
Power Transformers ◽  
Electric Networks ◽  
Load Factors ◽  
Optimal Load ◽  
Supply Systems

The purpose of this study is to study the effect of loading power transformers (PT) in their continuous use on their energy efficiency on a real-life example of existing rural electric networks. It is noted that the vast majority of PT in rural areas have a very low load factor, which leads to an increase in specific losses of electric energy when this is transmitted to various consumers. It is planned to optimize the existing synchronized power supply systems in rural areas by creating new power supply projects in such a way as to integrate existing power sources and ensure the most efficient loading of power transformers for the subsequent transfer of these systems to isolated ones that receive power from distributed generation facilities. As an example, we use data from an electric grid company on loading power transformers in one of the districts of the Irkutsk region. Issues related to the determination of electric energy losses in rural PT at different numerical values of their load factors are considered. A computing device was developed using modern programming tools in the MATLAB system, which has been used to calculate and plot the dependence of power losses in transformers of various capacities on the actual and recommended load factors, as well as the dependence of specific losses during the transit of 1 kVA of power through a power transformer at the actual, recommended and optimal load factors. The analysis of specific losses of electric energy at the actual, recommended and optimal load factors of PT is made. Based on the analysis, the intervals of optimal load factors for different rated power of PT of rural distribution electric networks are proposed. It is noted that to increase the energy efficiency of PT, it is necessary to reduce idling losses by increasing the load of these transformers, which can be achieved by reducing the number of transformers while changing the configuration of 0.38 kV distribution networks.

scholarly journals Calculation of the economy of electric energy in industrial electrical supply systems

2020 ◽  
Vol 22 (2) ◽  
pp. 65-74
Author(s):  
E. I. Gracheva ◽  
A. N. Gorlov ◽  
Z. M. Shakurova
Keyword(s):  
Power Supply ◽  
Energy Savings ◽  
Reactive Power ◽  
Electric Energy ◽  
Electrical Equipment ◽  
Total Power ◽  
Load Factor ◽  
Advantages And Disadvantages ◽  
Industrial Enterprises ◽  
Supply Systems

The article examines the main features of the layout of electrical equipment for shop networks of internal power supply with the definition of indicators for a group of shop customers connected to a single power center, affecting the choice of the structure of schemes for shop network sites. The parameters characterizing the circuit topology are revealed. A study is presented of the influence of the load factor of workshop transformers on their reactive power factor, it is proved by calculation by technical and economic criteria the feasibility of replacing a workshop transformer with two with a lower total power. The calculation of energy savings in the in-plant power supply systems. The type of dependences tgφ of transformers ТМ and ТСЗ with various rated powers in the function of loading transformers is established. The most significant factors of the growth of idle power losses during operation are presented. With determination of losses of active and reactive power and electricity in transformers and losses of active power in a high voltage distribution network A feasibility study was carried out on the options for internal power supply schemes with two transformers of lower power installed instead of one, and the feasibility of such a replacement to increase the efficiency of the equipment was proved and the estimated payback period for the investment capital was determined. A comparative analysis of the studied power supply schemes of industrial enterprises with the identification of their advantages and disadvantages.

scholarly journals Development of Interrelated Voltage Regulation System for Coal Mines Energy Efficiency Improving

2018 ◽  
Vol 41 ◽  
pp. 03013 ◽  
Author(s):  
Fedor Nepsha ◽  
Roman Belyaevsky
Keyword(s):  
Energy Efficiency ◽  
Power Consumption ◽  
Power Supply ◽  
Coal Mines ◽  
Voltage Regulation ◽  
Active Power ◽  
Regulation System ◽  
State Matrix ◽  
Voltage Level ◽  
Supply Systems

In this paper, the authors propose an algorithm for interrelated voltage regulation in the power supply system of coal mine which allows to provide a normative voltage level and to minimize the level of active power consumption. A feature of the proposed algorithm is a separate consideration of discrete and nondiscrete variables. Nondiscrete variables are represented as a state matrix. The optimization of nondiscrete variables is performed for each state. The algorithm chooses a state with the minimal active power consumption. The obtained values of discrete and nondiscrete variables are transferred in the form of control signals to voltage regulation devices. In this case, the periodicity of the switching is determined by the resource of the on-load tap-changing device. The use of this algorithm will theoretically allow increasing the energy efficiency of power supply systems of coal mines.

scholarly journals To the issue of assessing the efficiency of distributed generation in low-voltage electric networks

2020 ◽  
Vol 178 ◽  
pp. 01077
Author(s):  
A.N. Alyunov ◽  
A.Yu Belyanin ◽  
A.E. Nemirovsky ◽  
D.A. Zaripova
Keyword(s):  
Power System ◽  
Distributed Generation ◽  
Power Supply ◽  
Low Voltage ◽  
Electric Networks ◽  
Cost Of Electricity ◽  
Industrial Enterprises ◽  
Urgent Task ◽  
The Cost ◽  
Supply Systems

This article considers an urgent task of using autonomous sources for power supply systems of industrial enterprises of small and medium-sized production. The efficiency of choosing the time of their switching-on in peak hours of power system in order to reduce the cost of electricity is shown on the example of diesel generators.

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