Статті в журналах: "Electric energy losses"

1

Mustafa, Sameer, Mohammed Yasen, and Hussein Abdullah. "Evaluation of Electric Energy Losses in Kirkuk Distribution Electric System Area." Iraqi Journal for Electrical and Electronic Engineering 7, no. 2 (December 1, 2011): 144–50. http://dx.doi.org/10.37917/ijeee.7.2.10.

Повний текст джерела

Анотація:

Correct calculations of losses are important for several reasons. There are two basic methods that can be used to calculate technical energy losses, a method based on subtraction of metered energy purchased and metered energy sold to customers and a method based on modeling losses in individual components of the system. For considering the technical loss in distribution system included: transmission line losses, power transformer losses, distribution line losses and low-voltage transformer losses. This work presents an evaluation of the power losses in Kirkuk electric distribution system area and submit proposals and appropriate solutions and suggestions to reduce the losses. A program under Visual Basic was designed to calculate and evaluate electrical energy losses in electrical power systems.

Стилі APA, Harvard, Vancouver, ISO та ін.

2

Papaika, Yu, O. O. Lysenko, M. Rogoza, Yu Stepanenko, L. Tokar, and S. Yakimets. "ENERGY LOSSES WITHIN THE ELECTRIC EQUIPMENT IN TERMS OF POOR VOLTAGE QUALITY." Transactions of Kremenchuk Mykhailo Ostrohradskyi National University 1 (February 27, 2019): 9–13. http://dx.doi.org/10.30929/1995-0519.2019.1.9-13.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

3

Borodin, Maksim Vladimirovich, Tatyana Anatolievna Kudinova, and Zumeyra Munirovna Shakurova. "Software product to reduce commercial energy losses." E3S Web of Conferences 178 (2020): 01082. http://dx.doi.org/10.1051/e3sconf/202017801082.

Повний текст джерела

Анотація:

The personnel of electric grid companies spend considerable amount of time searching for noncontractual and non-meteredelectricity consumption. The raids carried out by personnel of electric grid companies to detect electricity theft are not always effective, as they are carried out selectively and often do not take into account many factors that could affect the number of detected cases of electricity theft. The article proposes a software product that allows, on the basis ofconsumers’ registration, who have already stolen electricity, have arrears in payment for consumed electricity, made uncontrolled consumption, carry out a process of technological connection or have non-meter accounting, to send personnel conducting a raid to identify electricity theft. It also makes possible to generate the necessary acts, certificates, etc.in real time, which allows staff to reduce the time to fill out paper versions and transfer the necessary documents to the police. The software product allows to increase the efficiency of raids by electric grid companies, by reducing the time of inspections. In turn, the implementation of the proposed software product will allow electric grid companies to significantly reduce energy losses by increasing the territoriality of raids.

Стилі APA, Harvard, Vancouver, ISO та ін.

4

Smolentsev, N. I., and L. M. Chetoshnikova. "Electric network topology and method of transmission of electric energy." Power engineering: research, equipment, technology 21, no. 4 (December 9, 2019): 95–103. http://dx.doi.org/10.30724/1998-9903-2019-21-4-95-103.

Повний текст джерела

Анотація:

The purpose of the work is to reduce losses and increase energy saving in electric networks. To achieve this goal, a multilevel topology of the electrical network and an asynchronous method for transferring electrical energy between nodes including a load, energy sources, energy storage devices connected in an appropriate manner are proposed. It is shown by the mathematical method that this network topology allows using energy storage devices controlled appropriately and using tele-information technologies to optimize the balance of electric energy in the network, achieving equality of the generated and consumed electricity. Such a network topology and a method of transmitting electrical energy can be the basis of digital technologies in the energy sector (ENERNET).

Стилі APA, Harvard, Vancouver, ISO та ін.

5

K. Hazaa, Hadi, Hussein H. Abdullah, Mohammed H. Yasen, and Sameer S. Mustafa. "Evaluation of Electric Energy Losses in Kirkuk Distribution Electric System Area." Iraqi Journal for Electrical And Electronic Engineering 7, no. 2 (December 28, 2011): 144–50. http://dx.doi.org/10.33762/eeej.2011.50321.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

6

Antsiferov, N. S. "Ways to Reduce Power Losses in Mining Power Supply Lines." Mining science and technology 4, no. 2 (August 25, 2019): 150–56. http://dx.doi.org/10.17073/2500-0632-2019-2-150-156.

Повний текст джерела

Анотація:

Electric energy is the most common and universal form of energy. It can be produced in large quantities near energy sources, transmitted to large distances, easily distributed between consumers and converted into mechanical, thermal, and light energy. Ensuring reliable and economical quality electric energy supply to mining enterprises with the optimal use of energy resources is one of the most important tasks facing the country's energy sector. In the Russian Federation, high degree of concentration of generating capacities at power plants has been achieved. The main capacities are concentrated in power plants with installed capacity of more than 1 million kW. High importance of the electric power industry is determined by the infrastructural nature of the industry and the direct relationship between the country's economic growth and the level of its development effectiveness. One of the most pressing problems of modern electricity supply is the problem of ensuring the quality of electric energy. The main reason for the deterioration in the electricity quality is widespread non-linear loads that create non-sinusoidal currents and voltage unbalance during their operation. The voltage unbalance is most often caused by the presence of an unbalanced load. Unbalanced load currents flowing through the elements of the power supply system cause unbalanced voltage losses in them. This results in appearance of unbalanced voltages on the terminals of electric apparatus. The voltage deviations at electric apparatus overdriven phase may exceed the normally acceptable values, while the voltage deviations at electric apparatus other phases may remain within the normal limits. In addition to the deterioration of the voltage mode at electric apparatus under the unbalanced voltage conditions, the operating conditions of both the electric apparatus and all the network elements are significantly worsened, and the reliability of the electrical equipment and the power supply system as a whole decreased. The paper considers the issues of reducing the voltage losses in power supply networks by improving quality of electric power.

Стилі APA, Harvard, Vancouver, ISO та ін.

7

Komolafe, O. M., and K. M. Udofia. "Review of electrical energy losses in Nigeria." Nigerian Journal of Technology 39, no. 1 (April 3, 2020): 246–54. http://dx.doi.org/10.4314/njt.v39i1.28.

Повний текст джерела

Анотація:

The Nigerian electric power sector holds a lot of unfulfilled potentials for the economic development of Africa’s most populous country; the electric energy generated is not up to 30% of the national demand and worse still, over 50% of this paltry sum is recorded as losses—this is not indicative of commercial viability. The visible efforts being made to address the problems, though laudable, do not fully demonstrate complete appreciation of the underlying root causes. In this paper, an examination of the structure of the Nigerian electricity industry is provided followed by a technical review of factors responsible for the excessive losses (technical and non-technical) in the system. The solutions proffered would enable improved response, first to efficiently manage the available energy and also to grow the industry for the good of the nation. Keywords: Nigerian power distribution system, electric energy theft, power losses in Nigeria.

Стилі APA, Harvard, Vancouver, ISO та ін.

8

Felea, Ioan, Istvan Csuzi, and Eva Barla. "Modelling and Assessing Energy Performance of an Urban Transport System with Electric Drives." PROMET - Traffic&Transportation 25, no. 5 (October 27, 2013): 495–506. http://dx.doi.org/10.7307/ptt.v25i5.1207.

Повний текст джерела

Анотація:

Energy conservation is one of the key priorities of sustainable development strategy. Transport systems are responsible for about one third of energy consumption. As result, the identification of solutions to reduce energy consumption in these systems is essential for the implementation of the sustainable development strategies. The present work is dedicated to identifying the possibilities for a reduction in the consumption of electric energy in electric urban public transport systems, using the audit of their electricity system. After justifying the importance of these concerns, a mathematical model of the electrical energy balance of the electric urban public transport system and its components is presented. The analysis is applied to determine the losses in the system components and useful energy, based on the evaluation and energy consumption measurements. The measurements to reduce energy losses are identified and characterized under technical and economic aspect, optimal electrical energy balances being done on this basis.

Стилі APA, Harvard, Vancouver, ISO та ін.

9

Гуков, P. Gukov, Авдеев, and A. Avdeev. "ENERGY IN RURAL AND ELECTRIC NETWORKS." Voronezh Scientific-Technical Bulletin 4, no. 4 (December 26, 2015): 10–14. http://dx.doi.org/10.12737/17002.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

10

Masaev, S. Kh, U. Kh Makaev, and M. V. Debiev. "The basic stages of improving the power grid complex functioning of the Chechen Republic." Power engineering: research, equipment, technology 22, no. 4 (November 15, 2020): 43–53. http://dx.doi.org/10.30724/1998-9903-2020-22-4-43-53.

Повний текст джерела

Анотація:

The article considers the state of the electric power industry functioning of the Chechen Republic. Comparative data on the reception in the network and useful electricity supply of the Chechen Republic in recent years are presented. The total transformer capacity structure of all substations, as well as the power lines total length of Chechenenergo JSC, is considered. The main electric power industry problems of the Chechen power system, which are the lack of own generating capacities, the transformer capacities shortage of substations 110 and 35 kV and the main production assets high level wear of the electric grid economy, are studied. The tasks to reduce the Chechen energy system electric energy losses are considered. The values and causes of the electric energy losses in different district electric networks (RES) of JSC "Chechenenergo" are determined. A comparative analysis of the electrical energy losses in recent years has been performed. Issues related to reactive power in electrical networks are considered. An analysis was carried out to determine the reactive power values in different district electric networks of Chechenenergo JSC. Measures are proposed that contribute to the reactive power normalization and the improvement of technical and economic indicators in electric networks. The networks electrical circuits improvement analysis was carried out to ensure the power supply stability and reliability to consumers in the republic. The production process control system and diagnostics is proposed, which will allow to regulate and coordinate the activities to manage the technical condition, as well as the power system reliability.

Стилі APA, Harvard, Vancouver, ISO та ін.

11

Kővári, Attila, and István Kádár. "Reduction Possibilities of Electrical Losses in Plastic Working Equipments." Materials Science Forum 659 (September 2010): 505–10. http://dx.doi.org/10.4028/www.scientific.net/msf.659.505.

Повний текст джерела

Анотація:

Plastic working technologies are frequently applied nowadays, as parts can be produced with larger productivity and smaller material loss compared to other technologies, at the same time the mechanical properties of parts are more favorable. Usually large tensile, pressure, bending or torsional forces, torques are required during plastic working. While pneumatic, hydraulic or electric energy is required to generate these. Used energy is determined by the losses of the energy required for working and that of energy conversion. The losses of working equipment are determined by mechanical losses and the losses of the energy converters applied, as well as by the manufacturing algorithm operating the working equipment. The advantage of electric driven working equipment over pneumatic and hydraulic driven ones is the better efficiency of energy converters, as well as the lower price of electric power. The disadvantage of electric converters is the large dimensions compared to hydraulic or pneumatic systems. Due to the development of electric servo drives the pneumatic and hydraulic drives are to be changed to electric drives in working equipment improving their control and accuracy features besides efficiency. In this paper the loss decreasing possibility of the working equipment with electric servo is investigated.

Стилі APA, Harvard, Vancouver, ISO та ін.

12

Pawawoi, Andi, Zuheldi Zuheldi, Fajril Akbar, and Refdinal Nazir. "Analysis of energy losses reduction potential on the distribution line of campus building through electric power quality improvement." Indonesian Journal of Electrical Engineering and Computer Science 17, no. 2 (February 1, 2020): 868. http://dx.doi.org/10.11591/ijeecs.v17.i2.pp868-876.

Повний текст джерела

Анотація:

In public and commercial buildings, the reduction of electricity consumption activities can be conducted through 3 paths, including improving the quality level of electric power, increasing the efficiency of electrical equipment, and reducing the waste of electric energy use. In this paper, the energy losses reduction potential on the distribution line of Engineering Faculty, Andalas University buildings through electric power quality improvement are analyzed. Power Quality (PQ) variables that considered in this analysis include power factor, unbalance current load and harmonics distortion. Analysis of correlation between PQ variables is required to determine the power loss on the distribution line of buildings. Using data of PQ variables recorded by Fluke Power Analyzer 435 series II, the energy losses of the distribution line without/with PQ improvement for each building is calculated. Analysis results have shown that the reduction potential is proportional to the value of PQ variables. Administrative faculty building with poor power quality has the potential to reduce its energy losses on the distribution line by 52.62% through power quality improvement. Civil engineering building group with quite good power quality only has the potential to reduce energy losses by 32.81%. Overall, the buildings in this faculty have the potential to reduce energy losses on distribution lines by 34.42% through its power quality improvement.

Стилі APA, Harvard, Vancouver, ISO та ін.

13

N. S., Okorie. "Optimization of Energy Efficiency for Electric Power Distribution System Losses." International Journal for Research in Applied Science and Engineering Technology 9, no. 12 (December 31, 2021): 934–40. http://dx.doi.org/10.22214/ijraset.2021.39074.

Повний текст джерела

Анотація:

Abstract: This study evaluated the existing electric power network of Mile 2 Diobu zone, Port Harcourt distribution network which consists of four (4) 11kV distribution feeders namely; Ojoto, Nsukka, Udi and Silverbird. This work considered Ojoto and Nsukka Street distribution network for improved power quality. The three (3) 33/11kv injection substations are fed from 165 MVA transmission station (PH Town) at Amadi junction by Nzimiro. Collection and analysis of data collected from the injection substations that supply electricity to mile 2 Diobu, Port Harcourt was the first consideration. The distribution network was modeled in Electrical Transient Analyzer Program (ETAP) using Newton-Raphson Load Flow equations. The simulation result of the existing condition network shows that the network has low voltage profile problem on Nsukka network and overloading of distribution transformers on Ojoto networks. The following optimization techniques are applied: up-gradation of distribution transformers, and transformer load tap changer to improve the distribution network for Mile 2 Diobu, Port Harcourt electrical power network. The simulation result of the improved distribution network for Mile 2 Diobu, Port Harcourt power network shows that the voltage profile Nsukka network has improved within the statutory limit which is between 95.0 -105.0% and the loading of the distribution transformers on Ojoto and Nsukka networks are all below 70% required capacity. Keywords: Optimization, Energy Efficiency Distribution

Стилі APA, Harvard, Vancouver, ISO та ін.

14

Lutsenko, Ivan, Sergey Fedoriachenko, Andrey Malienko, Natali Rukhlova, Evgen Koshelenko, Pavel Tsyhan, and Anton Kholodov. "Estimation of the potential of energy efficiency increase in SMARTGRID systems with prosum-ers based on electric vehicles." Bulletin of Kharkov National Automobile and Highway University, no. 95 (December 16, 2021): 241. http://dx.doi.org/10.30977/bul.2219-5548.2021.95.0.241.

Повний текст джерела

Анотація:

The modes of operation of power transformer substations 6 (20)/0.4 kV are analyzed. Scientific and technical solutions for the use of electric vehicles as prosumers of electric energy are substantiated. The potential influence of electric cars on electricity losses in "smart" electric networks is determined. Feasibility study of expediency of using electric mobiles as prosumers from the standpoint of loss reduction and efficiency of network equipment use is given. Quantitative indicators of the potential of equalization of the daily schedule of electric loads of the typical area of consumers of city electric networks are determined. The main indicator is the reduction of electricity losses in transformers by 7-10% compared with the existing ones when regulating the mode from the side of 0.4 kV with help of electric vehicles. Additionally, the possibility of increasing the capacity of electrical networks up to 45% identified.

Стилі APA, Harvard, Vancouver, ISO та ін.

15

Kefalas, Themistoklis D., and Antonios Kladas. "Reduction of Power Grid Losses by Using Energy Efficient Distribution Transformers." Materials Science Forum 721 (June 2012): 269–74. http://dx.doi.org/10.4028/www.scientific.net/msf.721.269.

Повний текст джерела

Анотація:

The importance of distribution transformer no-load loss on the operation of modern electrical grids is often underestimated. Internationally, distribution transformer no-load loss constitutes nearly 25% of the transmission and distribution losses of electrical grids. The losses in European Union distribution transformers are estimated at about 33 TWh/year whereas, reactive power and harmonic losses add a further 5 TWh/year. In the Greek electrical grid the no-load losses of 140,000 distribution transformers are estimated at about 490 GWh/year. This paper has two goals the first one is to illustrate the significance of distribution transformer no-load loss in periods of high electric energy cost and the second goal is the presentation of a novel numerical methodology for wound core transformers no-load loss analysis, enabling to determine the economically and technically optimum transformer for every use.

Стилі APA, Harvard, Vancouver, ISO та ін.

16

Opalev, D. P., E. A. Bekirov, and M. M. Asanov. "Analysis of Measures to Reduce the Energy Facilities Impact on the Environment on the Example of the Crimean Energy System." Journal of Physics: Conference Series 2096, no. 1 (November 1, 2021): 012119. http://dx.doi.org/10.1088/1742-6596/2096/1/012119.

Повний текст джерела

Анотація:

Abstract The world community is seriously concerned about the harmful effects of human activity on the environment. Reducing this influence is on the agenda for most countries. Energy facilities play the greatest role in environmental pollution with harmful emissions. Reducing the generated electricity will positively contribute to an improvement of the environmental situation. This can be achieved by decreasing electric energy losses during its transmission. The paper considers losses at various stages of electric energy transmission, presents the components of actual losses, as well as measures to reduce them. The effectiveness of two methods is analyzed on the example of the Crimean energy system: the method of interrupting the low voltage network and the method of disconnecting part of the transformers in the low loads mode. Conclusions about the need for operational regulation of the considered energy system in order to reduce electric energy losses are made.

Стилі APA, Harvard, Vancouver, ISO та ін.

17

Naumov, Igor V., Sergey V. Podyachikh, and Andrey V. Bastron. "The Power Quality Improving and its Losses Reducing with Balancing Devices." IOP Conference Series: Earth and Environmental Science 979, no. 1 (February 1, 2022): 012160. http://dx.doi.org/10.1088/1755-1315/979/1/012160.

Повний текст джерела

Анотація:

Abstract The method, algorithms, modeling, calculations and analysis the 0.38 kV electric network operation with unbalancing power consumption are considered. It is noted that the 0.38 kV electric networks, being electric low observability networks, are largely characterized by low power quality, which is accompanied by additional losses. An electric network model with a distributed load is presented. The current and voltage asymmetry indicators calculating method is developed, and the specialized balancing device parameters are determined. Bas ed on the obtained expressions, using Matlab technologies, the calculating asymmetric modes program was developed. The studied indicators were calculated for the created electric network model with symmetric and asymmetric loads. The balancing device influence degree on the quality indicators stabilization and the electrical energy additional losses reduction is established.

Стилі APA, Harvard, Vancouver, ISO та ін.

18

Khaychenko, I. A., V. V. Babenko, Yu V. Nefedov, and Anh Tu Ha. "Algorithm for reducing additional losses in asynchronous electric drives in plants with static power regulators." Proceedings of Tomsk State University of Control Systems and Radioelectronics 23, no. 4 (December 25, 2020): 93–98. http://dx.doi.org/10.21293/1818-0442-2020-23-4-93-98.

Повний текст джерела

Анотація:

The ways to reduce losses of electrical energy in power supply systems of industrial enterprises containing powerful semiconductor converters and asynchronous motors are considered. The source of additional electric power losses related to subharmonic nature of voltage fluctuations from operation of converters using the principle of frequency-pulse control is determined. The operation algorithm for thyristor switches of semiconductor converters is proposed, that provides reduction of electric power losses in asynchronous motors connected in parallel with powerful converters. The voltage graphs and currents of simulation model in operation modes of converters show the potential to increase energy efficiency of operation of a wide range of industrial objects with asynchronous motors, connected in parallel and having cyclically changing load.

Стилі APA, Harvard, Vancouver, ISO та ін.

19

D.A., Darshan, Sumith L.V., K. Sowjanya Reddy, K. Rasagnya, and Trupti V. N. "A STUDY OF ENERGY FLOW AT AN ELECTRICAL SUBSTATION THROUGH ENERGY AUDIT." International Journal of Research -GRANTHAALAYAH 5, no. 4RACEEE (April 30, 2017): 161–65. http://dx.doi.org/10.29121/granthaalayah.v5.i4raceee.2017.3339.

Повний текст джерела

Анотація:

This paper deals with the study of energy flow in a 220/ 66 kV substation. This study emphasizes on energy conservation by reducing power losses. Saving energy is the primary and overwhelming motivating factor for making energy improvements. Energy conservation can increase the environmental quality and higher the savings. Energy conservation lowers the energy costs by preventing future resource depletion (renewable energy source). Utilizing the electric power in the proper manner without wastage is the most important thing to consider. The main objectives are accumulating data at various energy points, identifying energy losses and critical junctions, enabling energy conservation and cost savings. Planning the use of electrical power in the most judicious way such that the usage as well as its wastage is minimized. For this purpose a energy management technique called energy audit is adopted. Energy auditing is required to determine the energy flows through various electrical installations such as feeders, transformers, substations in an electrical network system.

Стилі APA, Harvard, Vancouver, ISO та ін.

20

SAVINA, NATALIA VIKTOROVNA, VLADIMIR ALEXANDROVICH GAMOLIN, and LARISA ANATOLIEVNA MYASOEDOVA. "INTELLECTUALIZATION OF ELECTRICITY METERING AS A TOOL TO REDUCE ELECTRIC POWER LOSSES." Messenger AmSU, no. 93 (2021): 51–56. http://dx.doi.org/10.22250/jasu.93.11.

Повний текст джерела

Анотація:

Given the ever-increasing cost of electrical energy, minimizing of power losses is one of the main tasks for the electric grid systems. In this paper, we consider the features of intellectualization of electricity metering and the effect of the introduction of smart metering systems in terms of reduction of power losses.

Стилі APA, Harvard, Vancouver, ISO та ін.

21

Morel, Adrien, Alexis Brenes, David Gibus, Gaël Pillonnet, and Adrien Badel. "Electrical efficiency of SECE-based interfaces for piezoelectric vibration energy harvesting." Smart Materials and Structures 31, no. 1 (December 9, 2021): 01LT01. http://dx.doi.org/10.1088/1361-665x/ac3ebe.

Повний текст джерела

Анотація:

Abstract Piezoelectric energy harvesting interfaces have been widely investigated during the last decades in order to maximize the harvested power. Among the energy extraction circuits proposed in the literature, some of the most effective ones consist of extracting the electric charges from the piezoelectric elements in a synchronous way with the vibrations and within a very short portion of the vibration period (synchronized electric charge extraction (SECE), synchronous electric charge partial extraction, frequency tunable synchronous electrical charge extraction (FTSECE), etc.). For these strategies, most previous studies take the electrical efficiency (i.e. the electrical losses between the energy extracted from the piezoelectric element and the energy which is finally transferred in a storage element) into account in an ad-hoc and case-by-case manner. In this brief, we propose a unified analysis that applies to model the electrical efficiency of these SECE-based strategies taking into account losses introduced by the electrical interface. We identify the main loss mechanisms by demonstrating that the electrical efficiency mainly varies with two parameters: the quality factor of the electrical interface and the voltage inversion ratio of the considered strategy. Measurements on the FTSECE strategy show that our model predicts the stored power with a good accuracy and allows a better optimization of the harvesting interface (up to 5.4 times more stored power at off-resonance frequencies, and 30% larger harvesting bandwidth).

Стилі APA, Harvard, Vancouver, ISO та ін.

22

Naumov, I. V., S. V. Podyachikh, and A. N. Tretyakov. "About Electric Energy Additional Losses Reduction at the Phase Currents Unbalancing in the 0.38 kV Operating Networks." IOP Conference Series: Earth and Environmental Science 979, no. 1 (February 1, 2022): 012137. http://dx.doi.org/10.1088/1755-1315/979/1/012137.

Повний текст джерела

Анотація:

Abstract The materials of operation unbalancing modes studies in operating distribution electric 0.38 kV networks are presented. For research, electric energy parameters systematic measurements materials and its indicators characterizing the power quality have been used. The measurements were made by an electric grid organization order that provides to facilities power supply in the Irkutsk region. To assess the unbalancing modes, in accordance with the developed calculating the currents and voltages unbalance methods, the program “Imbalance-2" was created to determine these indicators. As a minimizing additional losses means, a special shunt-balancing device is used, which has the lowest possible zero-sequence currents resistance, which automatically changes its parameters. The program provides the device parameters determination in accordance with the changing current unbalance level at any time moment. Based on the created algorithm, the indicators characterizing the power quality, as well as additional power and energy losses caused by this unbalance are calculated and analyzed. It is established that the power quality meets the State Standard requirements, but the additional losses level is quite high. The full power total losses in the individual electrical network elements have been determined and the balancing device efficiency degree to reduce these losses are established. The used balancing device economic efficiency is determined.

Стилі APA, Harvard, Vancouver, ISO та ін.

23

WACHJOE, CONNY KURNIAWAN, HERMAGASANTOS ZEIN, and SITI SAODAH. "A Method for Determining Customers’ Energy Shrinkage Cost." ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika 8, no. 3 (August 27, 2020): 672. http://dx.doi.org/10.26760/elkomika.v8i3.672.

Повний текст джерела

Анотація:

ABSTRAKPenyusutan energi adalah salah satu komponen biaya-biaya listrik yang harus dibayar oleh pelanggan-pelanggan pada tegangan sistem dari jaringan yang berbeda, jaringan tegangan tinggi, sedang dan rendah. Meskipun biaya bahan bakar campuran adalah sama untuk semua pelanggan, alokasi kerugian berbeda untuk setiap jaringan tersebut. Makalah ini mengusulkan suatu metode untuk menentukan alokasi biaya penyusutan energi untuk pelanggan-pelanggan dalam suatu model rangkaian ekivalen, dengan beban dikumpulkan pada setiap jaringan. Formulasi-formulasinya diturunkan untuk mendapatkan alokasi kerugian yang adil di antara pelanggan-pelanggan berdasarkan hukum-hukum listrik. Hasil simulasi menunjukkan bahwa alokasi biaya penyusutan energi adalah 31%, 33% dan 36% untuk pelanggan tegangan tinggi, sedang dan rendah. Selain itu, efisiensi jaringan akan mempengaruhi total biaya penyusutan energi. Jika perhitungan kerugian daya menggunaka metode Aliran Daya Optimal, maka metoda ini dapat mengurangi kerugian sebesar ±3% atau setara dengan pengurangan biaya penyusutan energi sebesar 16%.Kata kunci: komponen biaya-biaya listrik, tegangan sistem, model rangkaian ekivalen, hukum-hukum listrik, alokasi biaya kerugian energi. ABSTRACTEnergy shrinkage is one component of electrical costs that must be paid by customers on the system voltage in different networks, high, medium, and low voltage networks. Although the fuel-mix costs are flat for all customers, loss allocation is different for each network. This paper proposes a method for determining the cost allocation of energy shrinkage to customers in an equivalent circuit model, with the loads collected for each network. Formulations are derived to get a fair allocation of losses among customers based on electric laws. The simulation results show that the cost allocation of energy shrinkage is 31%, 33%, and 36% for high, medium, and low voltage customers. Besides, network efficiency will affect the total cost of energy shrinkage. If power losses calculation uses the Optimal Power Flow method, it can reduce power losses by ±3% or equivalent to a reduction in the cost of energy shrinkage of 16%.Keywords: component of electrical costs, system voltage, eqivqlent sircuit model, electric laws, cost allocation of energy shrinkage

Стилі APA, Harvard, Vancouver, ISO та ін.

24

Agapitov, E. B., M. A. Lemeshko, and M. S. Sokolova. "Strategy of automation of electric arc heating of steel melt in ladle-furnaceStrategy of automation of electric arc heating of steel melt in ladle-furnaceStrategy of automation of electric arc heating of steel melt in ladle-furnace." Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information 77, no. 1 (January 19, 2021): 20–27. http://dx.doi.org/10.32339/0135-5910-2021-1-20-27.

Повний текст джерела

Анотація:

Prices hike for consumable materials and energy carriers, increase of requirements to steel quality stipulate the items of intensification of ladle treatment processes and decrease of their energy- and material capacity. Analysis of energy losses in ladlefurnace accomplished, as well as basic factors effecting the energy costs during treatment analyzed. A methodology elaborated for making thermal balance of ladle-furnace: it was proposed to present the melt treatment process in ladle-furnace as a series of separate operations, each having specific features of the process (heating, desulphurization, alloying) and their combination. Based on analysis of 20 thousand heats passports at ladle-furnace of MMK BOF shop, a mathematical model of energy supply system of ladle-furnace was elaborated. Based on the analysis made, a strategy of heating automation was proposed. In particular, electric losses were emphasized, t. e. total losses of electric arc energy, in which provisionally losses at arc open part radiation were included. Control of those flows creates conditions for heating efficiency increase. Conclusions were made that decrease of electric losses is observed at prolonged (about 8−12 min) heating periods and sufficient amount of slag, as well as at injection of additives after heating. Such a mode provides decrease of thermal losses by 4−5%. A new technology of steel melt treatment in ladle-furnace was proposed, characterized by decreased consumption of electric energy.

Стилі APA, Harvard, Vancouver, ISO та ін.

25

Rewatkar, Harshal. "Energy Conservation By Using Electric Transportation Vehicle." International Journal for Research in Applied Science and Engineering Technology 10, no. 1 (January 31, 2022): 1623–25. http://dx.doi.org/10.22214/ijraset.2022.38255.

Повний текст джерела

Анотація:

Abstract: This paper presents the design and implementation of a complete electric transportation vehicle by conservation by energy resources. Electric vehicles are widely used for pollution free transportation but it has been observed that distance travelled by battery operated electric vehicle is very less as pared with the other fuel powered engine and poor regenerative energy recapturing from the vehicle. There are so many types of losses in power converter which increase consumption of battery energy. For increment of distance travelled by electric vehicles and increment of recapturing of regenerative energy we have to improve performance of all component used in electric vehicle like electric motor, power converter and energy storage system like battery. That’s why in this project used alternator and voltage booster. This project presents comparative study of all components used in an electric vehicle. This project also concluded that which drive or converter is suitable for electric vehicle is being proposed. Best coordination of all components can lead to optimize power consumption in electric vehicle. Energy dissipated in power train during the operation of conversion from electrical energy to mechanical energy and vice-versa should be minimize. Keywords: Electric vehicle; motor; Energy storage system; Battery; Alternator

Стилі APA, Harvard, Vancouver, ISO та ін.

26

Alyunov, A. N., O. S. Vyatkina, I. G. Akhmetova, R. D. Pentiuc, and K. E. Sakipov. "Issues on optimization of operating modes of power transformers." E3S Web of Conferences 124 (2019): 02015. http://dx.doi.org/10.1051/e3sconf/201912402015.

Повний текст джерела

Анотація:

The article presents measure to optimize the operating modes of power transformers in order to minimize losses of electrical energy. The influence of actual voltage and service life of power transformers on electric power losses is shown. It was proposed to determine the economic capacity of power transformers taking into account the indicated factors, as well as taking into account the time of transformer switching on into the electric network and the form of the load schedule.

Стилі APA, Harvard, Vancouver, ISO та ін.

27

Gilfanov, K. H., N. Tien, R. N. Gaynullin, and I. Hallyyev. "Energy efficient heat supply system for electric power facilities." E3S Web of Conferences 124 (2019): 01011. http://dx.doi.org/10.1051/e3sconf/201912401011.

Повний текст джерела

Анотація:

The aim of the work is to confirm the possibility of creating an energy-saving heat supply system for power facilities by using computer modelling, analysis of the potential use of heat losses of electromagnetic energy in magnetic circuits and windings of transformers of substations, as well as the development of schemes for heat recovery losses for heat supply of power facilities. Computer simulation of electromagnetic and thermophysical processes in the power oil-filled transformer is carried out. Energy losses in windings, hysteresis and eddy currents in the magnetic circuit, as well as temperature and heat flux fields in the longitudinal and transverse sections of the oil-filled power transformer in idle and short-circuit modes were determined. The transformer performance in terms of heat recovery losses was evaluated. The possible volumes of heat extraction for heat supply depending on the power of the transformer are determined. The automated oil-water system of heat recovery of the transformer for heating of electric power facilities is proposed. The significance of the obtained results for the construction industry is to confirm the possibility of creating an energy-saving heat supply system for electric power facilities while maintaining the operational characteristics of the transformer based on computer modelling; the significant potential of using the heat loss of power transformers of substations is shown, an automated heat supply system for electric power facilities is proposed.

Стилі APA, Harvard, Vancouver, ISO та ін.

28

Kostinsky, Sergey, and Christina Vasileva. "Transformer Temperature Monitoring Unit for Evaluating Active Electric Energy Losses." Известия высших учебных заведений. Электромеханика 61, no. 1 (2018): 68–76. http://dx.doi.org/10.17213/0136-3360-2018-1-68-76.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

29

Diban, Bassel, and Giovanni Mazzanti. "The Effect of Insulation Characteristics on Thermal Instability in HVDC Extruded Cables." Energies 14, no. 3 (January 21, 2021): 550. http://dx.doi.org/10.3390/en14030550.

Повний текст джерела

Анотація:

This paper aims at studying the effect of cable characteristics on the thermal instability of 320 kV and 500 kV Cross-Linked Polyethylene XLPE-insulated high voltage direct-current (HVDC) cables buried in soil for different values of the applied voltages, by the means of sensitivity analysis of the insulation losses to the electrical conductivity coefficients of temperature and electric field, a and b. It also finds the value of dielectric loss coefficient βd for DC cables, which allows an analytical calculation of the temperature rise as a function of insulation losses and thermal resistances. A Matlab code is used to iteratively solve Maxwell’s equations and find the electric field distribution, the insulation losses and the temperature rise inside the insulation due to insulation losses of the cable subjected to load cycles according to CIGRÉ Technical Brochure 496. Thermal stability diagrams are found to study the thermal instability and its relationship with the cable ampacity. The results show high dependency of the thermal stability on the electrical conductivity of cable insulating material, as expressed via the conductivity coefficients of temperature and electric field. The effect of insulation thickness on both the insulation losses and the thermal stability is also investigated.

Стилі APA, Harvard, Vancouver, ISO та ін.

30

Rachev, S., and L. Dimitrov. "Evaluation of the behaviour of an induction motor for fan system under various external factors." IOP Conference Series: Materials Science and Engineering 1216, no. 1 (January 1, 2022): 012007. http://dx.doi.org/10.1088/1757-899x/1216/1/012007.

Повний текст джерела

Анотація:

Abstract Paper concerns a mathematical model developed for working process observation of a fan system squirrel-cage induction motor electric drive. The electric motor in question is designed for permanent, uninterruptible operation. The system of differential equations is converted and processed with the help of appropriate software. The impact of external factors is assessed – supply voltage deflection and variation of rates of mechanical quantities involved in the motion equation. Electrical power losses in steady-state regime and energy losses at start-up are calculated. The results obtained are practical oriented when considering methods to start and control the rotational frequency to imrove energy efficiency.

Стилі APA, Harvard, Vancouver, ISO та ін.

31

Setiawan, Rizal Justian, Ageng Widi Atmoko, and Imam Fauzi. "IoT-Based Electric Vampire Remover to Overcome Electric Vampire On Electronic Equipment." JTECS : Jurnal Sistem Telekomunikasi Elektronika Sistem Kontrol Power Sistem dan Komputer 1, no. 2 (July 14, 2021): 115. http://dx.doi.org/10.32503/jtecs.v1i2.1690.

Повний текст джерела

Анотація:

Based on data from PLN, in 2020 the number of PLN customers has reached 77,19 million or increase of 3.59 million customers compared to 2019 which amounted to 73,6 million customers. Along with modernization in Indonesia, without realizing it there is still a lot of wasted electrical energy from electronic devices that are left on standby and not used or electric vampires. The purpose of this research created a tool to overcome the problem of electric vampires in electronic equipment in order to reduce the number of losses below the national electric losses of 8%. The implementation method used for the design and manufacture of the Electric Vampire Remover is the Research and Development (R&D) research method. The steps taken are: 1) analysis of tool requirements, 2) design of tool, 3) manufacture of tool in the laboratory, 4) testing of tool functions and performance, 5) concluding the results. These stages are conducted in cycles to get the best result. The result of the research is the creation of an Electric Vampire Remover which is functionally proven to be able to control electrical equipment properly. This tool can be operated stand-alone or based on internet network. The results showed that the tool was able to reduce losses caused by electric vampires by 99%. The application of this tool at home is able to save 36,908 kWh which is equivalent to Rp. 53,320.99/month in the fare class or R-1/1300 VA power.

Стилі APA, Harvard, Vancouver, ISO та ін.

32

Linde, Thomas, Jun Ting Loh, Stefan Kornhuber, Karsten Backhaus, Stephan Schlegel, and Steffen Großmann. "Implications of Nonlinear Material Parameters on the Dielectric Loss under Harmonic Distorted Voltages." Energies 14, no. 3 (January 28, 2021): 663. http://dx.doi.org/10.3390/en14030663.

Повний текст джерела

Анотація:

The increasing number of power electronic devices in electrical grids may lead to harmonic distorted voltages, which are considered to be possible causes of component failures. In this study, the dielectric losses of epoxy polymer and functionally filled silicone rubber (f-SiR) samples are investigated under harmonic distorted voltages in terms of their dielectric losses and the consequent heat source density within the material. The results suggest that the epoxy polymer samples behave linearly to the electric field strength and therefore allow good predictability of the dielectric losses. The investigated f-SiR samples exhibit a nonlinear behaviour when an electric field threshold is exceeded. The subsequent direct loss measurements under harmonic distorted voltage reveal a sharp rise of the dielectric loss with increasing electrical field strength. This leads to a higher risk of excessive heat in the material when harmonics are present. In conclusion, the investigation highlights the difficulties of estimating dielectric losses in nonlinear dielectric materials when distorted voltages are present.

Стилі APA, Harvard, Vancouver, ISO та ін.

33

Toirov, Olimjon, Kamoliddin Alimkhodjaev, and Akhror Pardaboev. "Analysis and ways of reducing electricity losses in the electric power systems of industrial enterprises." E3S Web of Conferences 288 (2021): 01085. http://dx.doi.org/10.1051/e3sconf/202128801085.

Повний текст джерела

Анотація:

As a result of the analysis, ways to reduce electricity losses in the system of its production, distribution, transmission and consumption in industrial enterprises have been identified. The problem of recompense of jet capacity always occupied the important Place in the general complex problems of increasing transfer efficiency, distribution and consumption of electric energy. The correct decision such problems appreciably predetermines economy monetary and material resources, electrical supply improvement of quality. The main recompense problems of jet capacity should be considered with the account of modern views and taking into account new technical decisions in this area. The analysis of electricity losses in the Republic and increasing their energy efficiency while optimizing the consumption of reactive power is made. Recommendations have been developed to reduce losses on the line and in-plant losses of electricity.

Стилі APA, Harvard, Vancouver, ISO та ін.

34

Hanrahan, Brendan, Andrew Smith, and Bikram Bhatia. "Pyroelectrics on purpose: A perspective on generation vs harvesting." Applied Physics Letters 120, no. 12 (March 21, 2022): 120503. http://dx.doi.org/10.1063/5.0085949.

Повний текст джерела

Анотація:

Solid-state pyroelectric heat engines that utilize the temperature and electric field dependence of electric displacement are promising for high-efficiency high-power thermal-to-electrical energy conversion. However, one of the key challenges for pyroelectric energy conversion is the inaccessibility of tunable transient heat sources for energy harvesting. This Perspective analyzes the potential of thermal waveform engineering for pyroelectric energy generation. We use the Landau-Devonshire phenomenological model to evaluate the energy conversion performance of a representative pyroelectric material coupled to (1) static heat source/sink via thermal switches, and (2) modulated heat source. Using this thermodynamic analysis, which accounts for thermal and electrical losses, we demonstrate a path toward maximizing pyroelectric energy conversion performance through purposeful thermal and electrical control.

Стилі APA, Harvard, Vancouver, ISO та ін.

35

Kim, Sung-An, and Kyung-Pyo Hong. "Analysis and Experimental Verification of a Variable Speed Turbo Air Centrifugal Compressor System for Energy Saving." Energies 14, no. 4 (February 23, 2021): 1208. http://dx.doi.org/10.3390/en14041208.

Повний текст джерела

Анотація:

Conventional constant speed turbo air centrifugal compressor systems (TACCSs) consist of an electric motor driven at the constant speed and an inlet guide vane (IGV) for pressure control. TACCSs with an inverter for a variable speed drive (VSD) of the electric motor are more efficient than the conventional constant speed TACCS because they have a wide operating range and can minimize the power consumption. Therefore, this paper proposes a quadratic V/f control and VSD to reduce electrical and mechanical energy losses. To verify the energy saving effect of the TACCS with the proposed controls, this paper analyzes the performances of an electric motor drive system (EMDS) using the proposed quadratic V/f control considering load conditions of the turbo air centrifugal compressor (TACC) to reduce electrical energy losses. Furthermore, the performances of the conventional constant speed drive (CSD) using the IGV control and the proposed VSD were compared and analyzed in the test bench that represented an actual factory environment. As a result, the proposed quadratic V/f control and VSD experimentally verified energy savings of 4.44% and 23.37% compared to conventional controls. In addition, the economic feasibility of the proposed VSD was verified in the TACCS by analyzing the recovery period of the initial investment due to the addition of the inverter.

Стилі APA, Harvard, Vancouver, ISO та ін.

36

Nadolny, Zbigniew. "Determination of Dielectric Losses in a Power Transformer." Energies 15, no. 3 (January 28, 2022): 993. http://dx.doi.org/10.3390/en15030993.

Повний текст джерела

Анотація:

The article presents a method of determining dielectric losses that occur in insulating materials in a power transformer. These losses depend mainly on the electric field stress, pulsation, dielectric loss coefficient, and electrical permittivity of insulating materials. These losses were determined by integrating an expression describing unit losses. The determined dielectric losses were compared with the total losses of the transformer. It turned out that dielectric losses are a fraction of a percent of the total losses. The influence of the electrical permittivity of the insulating liquid and paper insulation on the value of dielectric losses was investigated. This influence was ambiguous, which is characteristic of stratified systems made of materials with different permittivity. An analysis of the influence of the dielectric loss coefficient tan(delta) on the value of dielectric losses in the transformer was carried out. The impact of this coefficient on the amount of dielectric losses turned out to be directly proportional.

Стилі APA, Harvard, Vancouver, ISO та ін.

37

Kasprzyk, Leszek, and Robert Pietracho. "Influence of electric vehicles on the electrical grid." ITM Web of Conferences 19 (2018): 01033. http://dx.doi.org/10.1051/itmconf/20181901033.

Повний текст джерела

Анотація:

The article discusses the issue of the development of electric energy storage and their impact on the power grid on the example of a charging station, to which a group of vehicles that have the capacity to transfer energy to the grid (V2G) is connected. An exemplary simulation of power distribution, energy losses in nodes of a standard IEEE 5 type network in two variants is presented: without and taking into account the impact of charging and discharging to grid the electric vehicles. The obtained results of power distribution in individual network nodes and power losses are presented in diagrams and commented.

Стилі APA, Harvard, Vancouver, ISO та ін.

38

Mustangin, Muhamad, and Saptyaji Harnowo. "AUDIT ENERGI LISTRIK DAN BOILER PABRIK KELAPA SAWIT KAPASITAS 60 TON/JAM." Jurnal Agro Fabrica 2, no. 1 (June 29, 2020): 16–23. http://dx.doi.org/10.47199/jaf.v2i1.139.

Повний текст джерела

Анотація:

Palm Oil Factory Energy consists of steam and electricity. To increase the performance, energy will to be audited. Electrical measurements are carried out at the power house, panels at each station and some electric motors. Measurement in the main panel uses a power quality analyzer that can measure power, power factor, harmonics, unbalance and other electrical parameters. For measurement of mechanical equipment with steam energy such as boilers and turbines using temperature measuring devices with infrared thermal imaging tools FLIR brand. The quality of electric power with a total harmonic of 5.12% and individual harmonics of 2.78%. Voltage and current unbalance are 0.09% and 0.15%. Voltage drop is equal to 3 volts. The use of electricity utilities is 22.81 kW / ton FFB. The factory has cos phi of 0.84 but requires automatic power factor correction. The efficiency of boilers is 64.19% with the biggest losses being dry flue gas of 20.19% and oyher boiler of 67.82% with the biggest losses being dry flue gas of 16.45%.

Стилі APA, Harvard, Vancouver, ISO та ін.

39

Zhemerov, George G., and D. V. Tugay. "COMPONENTS OF TOTAL ELECTRIC ENERGY LOSSES POWER IN PQR SPATIAL COORDINATES." Electrical Engineering & Electromechanics, no. 2 (May 18, 2016): 11. http://dx.doi.org/10.20998/2074-272x.2016.2.02.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

40

Ismagilov, F. R., I. Kh Khairullin, V. E. Vavilov, V. I. Bekuzin, A. S. Gorbunov, and R. D. Karimov. "Energy losses in the electric motor of a high-speed spindle." Russian Engineering Research 37, no. 3 (March 2017): 253–57. http://dx.doi.org/10.3103/s1068798x17030091.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

41

Roshandel, Emad, Amin Mahmoudi, Solmaz Kahourzade, Amirmehdi Yazdani, and GM Shafiullah. "Losses in Efficiency Maps of Electric Vehicles: An Overview." Energies 14, no. 22 (November 22, 2021): 7805. http://dx.doi.org/10.3390/en14227805.

Повний текст джерела

Анотація:

In some applications such as electric vehicles, electric motors should operate in a wide torque and speed ranges. An efficiency map is the contour plot of the maximum efficiency of an electric machine in torque-speed plane. It is used to provide an overview on the performance of an electric machine when operates in different operating points. The electric machine losses in different torque and speed operating points play a prominent role in the efficiency of the machines. In this paper, an overview about the change of various loss components in torque-speed envelope of the electric machines is rendered to show the role and significance of each loss component in a wide range of torque and speeds. The research gaps and future research subjects based on the conducted review are reported. The role and possibility of the utilization of the computational intelligence-based modeling of the losses in improvement of the loss estimation is discussed.

Стилі APA, Harvard, Vancouver, ISO та ін.

42

CRĂCIUNESCU, Aurelian. "CURRENT CONCERNS REGARDING THE CONSTRUCTION OF HIGH POWER DENSITY ELECTRICAL MACHINES FOR ELECTRICITY TRANSPORT SYSTEMS." ACTUALITĂŢI ŞI PERSPECTIVE ÎN DOMENIUL MAŞINILOR ELECTRICE (ELECTRIC MACHINES, MATERIALS AND DRIVES - PRESENT AND TRENDS) 2021, no. 1 (November 19, 2021): 1–41. http://dx.doi.org/10.36801/apme.2021.1.16.

Повний текст джерела

Анотація:

"Applications such as electrification of transmission systems require electric machines with high power density values. Such electric cars offer beneficial volumes and weights that are desired in transportation systems that include electric cars, electrified planes, and other types of electric vehicles. In October 2017, the US DRIVE groupThe U.S. Department of Energy (DOE), a large automobile and power company, has published a paper entitled “Roadmap for Research and Innovation in Electrical and Electronic Technologies for Efficiency vehicles and energy sustainability ”. This paper outlines the performance values that electric traction motors must have in 2025 to accelerate the development of innovative and pre-competitive technologies to achieve a wide range of clean and efficient vehicles as well as related energy infrastructure. Thus, for electric traction motors with powers of 100 kW, used in the drive systems of single-electric vehicles, which is used in both engine and generator mode, for their power density is expected to increase from the value of 5.7 kW / L achieved in 2020 to the value of 50 kW / L to be achieved in 2025, which means a volume reduction of 89%. This reduction in volume must be accompanied by a reduction in the cost of these engines, from $ 4.7 / kW in 2020 to $ 3.3 / kW in 2025, ie a cost reduction of 30%. One of the factors that limits the power density of electric cars is the cooling system. In the absence of adequate cooling systems, the energy losses that occur in electric cars can cause damage to the insulation system, short circuits between the windings of the windings, demagnetization of the permanent magnets and, finally, damage to the drive system. As a result, the analysis of ways to reduce energy losses in electric cars and the identification of efficient cooling systems are essential concerns for the realization of electric cars with high values of power density. In this paper, a presentation is made of the results of recently published research on finding constructive solutions for the realization of electric machines with very low energy losses as well as solutions for the realization of high-efficiency cooling systems, solutions that allows the performance of performance indicators for electric cars, on power density and cost, expected by the US Drive group for 2025."

Стилі APA, Harvard, Vancouver, ISO та ін.

43

Akhiezer, Olena, Olha Dunaievska, Irina Serdyuk, Olha Butova, and Mykhailo Shyshkin. "Efficiency in the modeling of the diet production of electric energy." Problems of Innovation and Investment Development, no. 17 (December 4, 2018): 128–46. http://dx.doi.org/10.33813/2224-1213.17.2018.15.

Повний текст джерела

Анотація:

The problem of irregular electricity consumption during 24 hours is considered. In the process of production, transmission and consumption of electricity, losses occur. It should be noted that all types of losses, other than losses on transmission lines, are in no way related to the nature of the distribution of electricity among consumers. This circumstance makes the problem of the rational distribution of the total generated electricity actual. Due to the need to store large volumes of electricity in the workplace, storage facilities have been used. As a result, a three-index distribution problem of linear programming with intermediate centers is obtained. The paper suggests some simplification of the obtained problem, which consists in the fact that the formulated distribution problem can be reduced to a set of two sub-problems. The distributive nature of the constraints makes this problem nontrivial. In this connection, the method of reducing distribution subproblems to transportation ones is proposed. The corresponding computational procedures are described.

Стилі APA, Harvard, Vancouver, ISO та ін.

44

Bocean, Claudiu George, Anca Antoaneta Vărzaru, Andreea Teodora Al-Floarei, Simona Dumitriu, Dragoş Laurenţiu Diaconescu, and Mihai Constantin Răzvan Barbu. "Efficient Management of Power Losses from Renewable Sources Using Removable E.V. Batteries." Applied Sciences 11, no. 14 (July 12, 2021): 6413. http://dx.doi.org/10.3390/app11146413.

Повний текст джерела

Анотація:

Electric vehicles (E.V.) are one of the feasible solutions to address the challenges of sustainable development that require particular attention, such as climate change, depletion of fossil fuel reserves, and greenhouse gas emissions. In addition to the environmental benefits of electric vehicles, they can also be used as a storage system to alleviate the challenges posed by the variability of renewable electricity sources and to provide the network with ancillary benefits, such as voltage regulation and frequency regulation. Furthermore, using removable batteries by electric vehicles to store renewable energy is an innovative and effective solution to combat the increase in GHG emissions. In this article, using the autoregressive integrated moving average forecast model, we estimate the necessary storage capacity to contribute to the adjustment of the energy system increasingly powered by renewable energy sources. Also, we estimate the number of electric vehicles needed to take over the excess energy produced by renewable sources when the conventional grid cannot take over this surplus. The forecasts have the year 2050 as a time horizon. The results show that removable E.V. batteries can be an efficient solution for managing and storing energy lost in the temporal incongruity of demand with supply in the energy market.

Стилі APA, Harvard, Vancouver, ISO та ін.

45

Vinogradov, Aleksandr V., Aleksey V. Bukreyev, Alina V. Vinogradova, and Vadim E. Bol’shev. "Identification of Power Grid Lines with Increased Power Losses Using Mobile Electric Meters and Timers." Elektrotekhnologii i elektrooborudovanie v APK, no. 3 (September 20, 2020): 31–36. http://dx.doi.org/10.22314/2658-4859-2020-67-3-31-36.

Повний текст джерела

Анотація:

Identifying sections of 0.4 kilovolt power grid lines with increased power losses is an urgent task, the solution of which will free up some of the funds spent by power grid companies to compensate for power losses and direct them to the reconstruction and modernization of electric networks. It is necessary to monitor electricity consumption on sections of power grid lines and on the connections of consumers, and compare data on consumption. Existing devices that analyze the quality of electrical energy and can control current and power in the network, such as power quality analyzers, do not have the full necessary qualities, since they are intended for other purposes, and they are also very expensive. (Research purpose) The research purpose is in developing technical means for identifying sections of 0.4 kilovolt power grid lines with increased power losses, which also allow performing a survey of operating modes of power grid lines. (Materials and methods) The article presents a review of literary sources and an analysis of statistical data. (Results and discussion) The article presents developed technical tools for inspection of power grid lines of 0.4 kilovolts and identification of areas with increased losses of electrical energy, portable single-phase and three-phase electric meter and timer. The single-phase mobile electric meter and timer can be used for the survey of single-phase connections of consumers, three-phase one can be used for the survey of any sections of power lines. Authors also developed a version of the portable electric meter and timer with up to six independent sensors. (Conclusions) It is most rational to use a version of the mobile meter and timer equipped with Wi-Fi data transmission technology to detect power losses on sections of 0.4 kilovolts power grid lines, since in this case simultaneous monitoring of several sections is provided with the possibility of obtaining information from sensors in real time. The data allow to calculate technological and commercial losses on power line sections and draw conclusions about whether they are overstated.

Стилі APA, Harvard, Vancouver, ISO та ін.

46

Naumov, I. V., D. N. Karamov, A. N. Tretyakov, M. A. Yakupova, and E. S. Fedorinovа. "Study of power transformer loading in rural power supply systems." Safety and Reliability of Power Industry 13, no. 4 (February 18, 2021): 282–89. http://dx.doi.org/10.24223/1999-5555-2020-13-4-282-289.

Повний текст джерела

Анотація:

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.

Стилі APA, Harvard, Vancouver, ISO та ін.

47

Boldyrev, Alexander. "Energy-efficient inverter circuit for the low-voltage asynchronous driver controller with autonomous power supply." E3S Web of Conferences 279 (2021): 01004. http://dx.doi.org/10.1051/e3sconf/202127901004.

Повний текст джерела

Анотація:

The design of the energy-efficient inverter circuit for the asynchronous frequency-controlled three-phase electric driver with autonomous low-voltage DC power supply. The components analysis of the electric drive, the main components selection approach: microcontroller, three-phase driver and power transistors. R&D prototype of the energy-efficient inverter circuit was created, characterized by an average consumption current reduced by 5%. Reducing energy losses is achieved by reducing dynamic losses in the power circuits of a low-voltage inverter and using several circuit solutions.

Стилі APA, Harvard, Vancouver, ISO та ін.

48

Khobragade, Priya A. "Multiport Converter based EV Charging Station with PV and Battery." International Journal for Research in Applied Science and Engineering Technology 9, no. VI (June 14, 2021): 2518–21. http://dx.doi.org/10.22214/ijraset.2021.34679.

Повний текст джерела

Анотація:

: As a ecofriendly electrical vehicle, is vehicles that are used electric motor or traction motor. Are receiving widespread attention around the world due to their improved performance and zero carbon emission . The electric vehicle depend on photovoltaic and battery energy storage system . Electric vehicles include not limited road and railways. It consist of many electric appliances for use in domestic and industrial purposes that is electric car ,electric bike ,electric truck ,electric trolley bus , electric air craft ,electric space craft.The main Moto of this paper is a modelling of proposed system smart charging for electrical vehicle insuring minimum stress on power grid . The large scale development of electrical vehicle we need electric charging station for example fast charging station and super-fast charging station . During a peak demand load , large load on charging station due to the voltage sag , line fault and stress on power grid . At this all problem avoid by multiport converter based EV charging station with PV and BES by using analysis of MATLAB simulation. Result and conclusion of this paper to reduce losses improving efficiency of solar energy , no pollution (reduce) fast charging as possible as without any disturbance.

Стилі APA, Harvard, Vancouver, ISO та ін.

49

Pavlov, Vladimir. "Comparison of two starting options for conveyor belt electric drive." Proceedings of Irkutsk State Technical University 24, no. 5 (October 2020): 1069–79. http://dx.doi.org/10.21285/1814-3520-2020-5-1069-1079.

Повний текст джерела

Анотація:

The purpose of the paper is to study the energy and operational parameters of a belt conveyor under two starting methods: direct and frequency. Taking into account the non-linearity of the mathematical description of belt conveyor mechanical part and induction motor drive, the analysis of starting modes is carried out by the method of nonlinear differential calculus where equivalent masses are replaced with the discrete ones. The calculations are performed on the models using MATLAB. It is found out that the use of a frequency converter for the conveyor allows to reduce the maximum current by 4.7 times when starting the motor; by 2.5 times the maximum moment; by 1.52 times the maximum moment of resistance forces on the motor shaft; by 8.68 times the maximum value of power losses in stator windings; by 10.2 times the total power losses; by 2.9 times the power consumed from the network; by 3.4 times the amount of energy losses in the stator windings; by 3 times the total energy losses; by 1.25 times the energy consumed from the network; by 3 times the maximum acceleration of the belt; by 3 times the overshooting values during transients by the values of leading tension forces of the belt on various sections of the conveyor; by 1.875 times the transients duration in terms of the leading tension forces of the belt on different sections of the conveyor. The developed mathematical model of the belt conveyor makes it possible to obtain quantitative estimates of energy and operational parameters of the installation under two starting methods: direct and frequency. The use of frequency start-up of the conveyor allows to decrease motor energy losses by 3 times. It also reduces motor heating as well as decreases the maximum values of belt tension forces on various sections of the conveyor by more than three times.

Стилі APA, Harvard, Vancouver, ISO та ін.

50

Benevieri, Alessandro, Lorenzo Carbone, Simone Cosso, Krishneel Kumar, Mario Marchesoni, Massimiliano Passalacqua, and Luis Vaccaro. "Series Architecture on Hybrid Electric Vehicles: A Review." Energies 14, no. 22 (November 16, 2021): 7672. http://dx.doi.org/10.3390/en14227672.

Повний текст джерела

Анотація:

The use of series architecture nowadays is mainly on hybrid buses. In comparison with series-parallel and parallel architectures, which are usually exploited on medium-size cars, the series architecture allows achieving internal combustion engine higher efficiency. The downside of this architecture, due to a double energy conversion (i.e., mechanical energy converted in electrical energy and electrical energy converted again in mechanical energy), is that additional losses are introduced. For this reason, the parallel and the series/parallel architectures were considered more suitable for hybrid medium-size cars. Nevertheless, the use of new technologies can change this scenario. Regarding storage systems, supercapacitors achieved a significant energy density, and they guarantee much higher efficiency than battery storage. Moreover, the use of wide-bandgap components for power electronic converters, such as silicon carbide devices, assure lower losses. In this scenario, the series architecture can become competitive on medium-size cars. This paper shows a review of various studies performed on this topic.

Стилі APA, Harvard, Vancouver, ISO та ін.

Статті в журналах з теми "Electric energy losses"

Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями