scholarly journals KAJIAN EFISIENSI ENERGI DENGAN PENGATURAN SUPLAI ENERGI LISTRIK

JURNAL ELTEK ◽  
2018 ◽  
Vol 16 (1) ◽  
pp. 98
Author(s):  
Mochammad Mieftah
Keyword(s):  
Energy Efficiency ◽  
Power Supply ◽  
Energy Cost ◽  
Energy Supply ◽  
Electric Energy ◽  
Electrical Energy ◽  
Production Costs ◽  
Electricity Production ◽  
Electrical System ◽  
Turbine Generator

A power system can be said to be reliable if it has a high continuity of service. To achieve this, an operational arrangement is required to optimize installed power to supply the load to avoid overloading or over-supply of the system. Modjopanggoong Sugar Factory Tulungagung is one of the sugar producing industries, where the electrical system in this factory uses two power supply, which is using PLN supply and Turbine Generator Boiler (BTG). The use of more than one power supply resulted in an increase in the required electricity production costs. To solve this problem, in this research will be conducted a study to make efficient of electrical energy cost which is done by arranging supply of electric energy, that is using maximum supply of BTG and its deficiency supported PLN supply (alternative I), using PLN maximum supply and its deficiency is supported BTG supply alternative II) and only use PLN supply (alternative III). The results showed that energy efficiency can be done with the regulation of energy supply at the factory, that is in alternative I with savings Rp.430.025.007 (2.1%), alternative II with savings of Rp. 553,984,815 (2.7%), and alternative III with savings of Rp. 2.055.727.407 (10%).

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 INTEGRATED ENERGY SUPPLY SYSTEM WITH THE USE OF VENTILATION SYSTEMS

2020 ◽  
Author(s):  
V. Stepanenko ◽  
Y. Veremiichuk
Keyword(s):  
Energy Efficiency ◽  
Power Supply ◽  
Energy Supply ◽  
Air Conditioning ◽  
Power Supply System ◽  
Negative Impact ◽  
Energy System ◽  
Supply System ◽  
Energy Supply System ◽  
Air Conditioning Systems

The implementation of an integrated energy supply system is an effective way to increase energy efficiency, reduce CO2 emissions and increase the use of renewable energy, as well as provide opportunities for energy production, conversion and storage in interconnected infrastructures for energy system operators and consumers. Also, increasing the level of energy efficiency of the energy supply system is one of the important strategies to slow down the growth of demand and mitigate the negative impact on health, the economy and the environment. The article considers the integrated use of energy, the introduction of energy hubs as part of future energy networks and proposes a schematic diagram of an integrated energy supply system. The article presents the results of modeling and computational experiment of ventilation and air conditioning systems in the integrated power supply system, taking into account the technical and operational characteristics of SES, regulatory and technical documents and building codes. According to the results of the study, it is established that the schedule of SES generation and the schedule of electricity consumption by ventilation and air conditioning systems are similar, which leads to a reduction in operating costs and a reduction in the load on the building's power supply system. The scientific substantiation of the integration of the energy storage system into the energy supply structure has been further developed, which will ensure the reliability of the power supply and the efficiency of the solar power plant.

scholarly journals Analisa Pembangkit Listrik Tenaga Diesel Gas Dengan Menggunakan Bahan Bakar LNG Dan Minyak Solar Di PT Indonesia Power Unit Pembangkitan Bali

Jurnal METTEK ◽  
2018 ◽  
Vol 4 (1) ◽  
pp. 31
Author(s):  
K G Trisna Upadana Putra ◽  
I Gusti Bagus Wijaya Kusuma ◽  
Made Sucipta
Keyword(s):  
Diesel Fuel ◽  
Electric Energy ◽  
Production Capacity ◽  
Engine Performance ◽  
Electrical Energy ◽  
Plant Performance ◽  
Electricity Production ◽  
High Demand ◽  
The Difference ◽  
Performance Equation

Permintaan energi listrik mengalami peningkatan, seiring peningkatan pertumbuhan populasi penduduk dan banyaknya industri. Tingginya permintaan energi listrik menjadi sebuah tantangan untuk produsen listrik, dalam memenuhi kebutuhan pelanggan akan energi listrik. Produsen listrik terbesar di Bali adalah PT. Indonesia Power UP Bali. Pembangkit yang dimiliki yaitu PLTDG dengan kapasitas produksi listrik 200 MW dioperasikan menggunakan bahan bakar gas LNG dan minyak solar (HSD/LFO). Dikarenakan penggunaan minyak solar dibatasi, maka PLTDG dioperasikan dengan gas LNG. Perbedaan bahan bakar yang digunakan mempengaruhi unjuk kerja dari pembangkit. Analisa unjuk kerja memberi gambaran dalam sisi keteknikan dan analisa BPP pembangkitan memberi gambaran dalam sisi keekonomian. Penelitaian ini dilakukan dengan cara perhitungan menggunakan persamaan-persamaan unjuk kerja mesin diesel, kemudian dibandingkan unjuk kerja PLTDG menggunakan bahan bakar LNG dan minyak solar dan dianalisa secara keekonomian. Hasil yang didapat yaitu unjuk kerja PLTDG menggunakan minyak solar lebih besar tetapi dari sisi keekonomian hasil BPP PLTDG menggunakan gas LNG lebih ekonomis. Demand for electric energy has increased, as population growth increases and the number of industries. The high demand for electrical energy becomes a challenge for electricity producers, in meeting the needs of customers for electrical energy. The largest power producer in Bali is PT. Indonesia Power UP Bali. The power plant owned by PLTDG with 200 MW electricity production capacity is operated using LNG gas and diesel fuel (HSD/LFO). Due to the use of diesel fuel is limited, the PLTDG is operated with LNG gas. The difference in fuel used affects the performance of the plant. Performance analysis gives an overview in terms of engineering and BPP analysis provides an overview of the economy side. This research is done by calculation using diesel engine performance equation, and then compared the performance of PLTDG using LNG and diesel fuel and analyzed economically. The results obtained are the performance of diesel powered PLTDG larger but in terms of economics of BPP PLTDG results using LNG gas is more economical.

scholarly journals Energies and Its Worldwide Research

Energies ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 6700
Author(s):  
Nuria Novas ◽  
Alfredo Alcayde ◽  
Isabel Robalo ◽  
Francisco Manzano-Agugliaro ◽  
Francisco G. Montoya
Keyword(s):  
Energy Efficiency ◽  
Renewable Energy ◽  
Energy Storage ◽  
Power Systems ◽  
Smart Grids ◽  
High Efficiency ◽  
Scientific Journal ◽  
Electric Energy ◽  
Electrical Energy ◽  
Energy Research

Energy efficiency and management is certainly one of the key drivers of human progress. Thus, the trends in the energy research are a topic of interest for the scientific community. The aim of this study is to highlight global research trends in this field through the analysis of a scientific journal indexed exclusively in the energy and fuels category. For this purpose, a journal has been selected that is in the center of the category considering its impact factor, which is only indexed in this category and of open access, Energies of the publisher MDPI. Therefore, a bibliometric analysis of all the contents of the journal between 2008 and 2020, 13,740 documents published, has been carried out. Analyzing the articles that are linked to each other by their citations, 14 clusters or research topics have been detected: smart grids; climate change–electric energy community; energy storage; bioenergy sources; prediction algorithms applied to power; optimization of the grid link for renewable energy; wind power; sustainability of power systems; hydrocarbon improvements; conversion of thermal/electrical energy; electric motor advancements; marine renewable energy; hydropower and energy storage; and preventive techniques in power transformers. The main keywords found were electric vehicle, renewable energy, microgrid, smart grid, and energy efficiency. In short, energy research remains necessary to meet the future challenge of sustainable energy with high efficiency and the exploration of new renewable resources, all for increasingly sustainable cities.

Measuring electric energy efficiency in Portuguese households

2015 ◽  
Vol 26 (3) ◽  
pp. 407-422 ◽  
Author(s):  
Thomas Weyman-Jones ◽  
Júlia Mendonça Boucinha ◽  
Catarina Feteira Inácio
Keyword(s):  
Time Series ◽  
Energy Efficiency ◽  
Energy Demand ◽  
Energy Use ◽  
Time Series Data ◽  
Electric Energy ◽  
Electrical Energy ◽  
Series Data ◽  
Data Set ◽  
Content Type

Purpose – There is a great interest from the European Union in measuring the efficiency of energy use in households, and this is an area where EDP has done research in both data collection and methodology. This paper reports on a survey of electric energy use in Portuguese households, and reviews and extends the analysis of how efficiently households use electrical energy. The purpose of this paper is to evaluate household electrical energy efficiency in different regions using econometric analysis of the survey data. In addition, the same methodology was applied to a time-series data set, to evaluate recent developments in energy efficiency. Design/methodology/approach – The paper describes the application to Portuguese households of a new approach to evaluate energy efficiency, developed by Filippini and Hunt (2011, 2012) in which an econometric energy demand model was estimated to control for exogenous variables determining energy demand. The variation in energy efficiency over time and space could then be estimated by applying econometric efficiency analysis to determine the variation in energy efficiency. Findings – The results obtained allowed the identification of priority regions and consumer bands to reduce inefficiency in electricity consumption. The time-series data set shows that the expected electricity savings from the efficiency measures recently introduced by official authorities were fully realized. Research limitations/implications – This approach gives some guidance on how to introduce electricity saving measures in a more cost effective way. Originality/value – This paper outlines a new procedure for developing useful tools for modelling energy efficiency.

scholarly journals On the power quality of electrical energy supplied to joint stock company “Aleksandrovsky mine”

2020 ◽  
Vol 209 ◽  
pp. 07012
Author(s):  
Oleg V. Zapanov ◽  
Lidiia I. Kovernikova
Keyword(s):  
Low Power ◽  
Power Quality ◽  
Energy Supply ◽  
Electric Energy ◽  
Electrical Energy ◽  
Electrical Equipment ◽  
Economic Damage ◽  
Joint Stock Company ◽  
Stock Company ◽  
Electric Networks

Joint Stock Company (JSC) “Mine Aleksandrovsky” is located in the Mogochinsky district of the Trans-Baikal Territory. “Mine Aleksandrovsky” concluded an energy supply agreement with JSC “Chitaenergosbyt” for the purchase of electric energy from it. In accordance with the contract, the electric energy supplier undertakes to supply electric energy that meets the requirements of the current legislation of the Russian Federation. The power quality in the Trans-Baikal Territory in most regions does not meet the requirements of State Standard 32144-2013. Suppliers and the network organization are responsible to consumers for the reliability of its electric energy supply and its quality within the boundaries of their electric networks. Despite the obligations of the contract, the electric energy supplied to “Mine Alexandrovsky” does not meet the requirements. In 2017 the ball mill engine in the shredding department of the gold recovery factory failed as a result of power outages and the supply of low power quality through the 6 kV line. The article provides information on interruptions in power supply over the years of operation of the enterprise, the results of analysis of the power quality, information on damage to electrical equipment caused by low power quality, and economic damage.

scholarly journals Perencanaan Pembangkit Listrik Tenaga Surya Hybrid Pada Area Parkir Gedung Dinas Cipta Karya, Dinas Bina Marga Dan Pengairan Kabupaten Badung

2018 ◽  
Vol 5 (2) ◽  
pp. 67
Author(s):  
Eric Timotius Abit Duka ◽  
I Nyoman Setiawan ◽  
Antonius Ibi Weking
Keyword(s):  
Energy Supply ◽  
Electrical Power ◽  
Slope Angle ◽  
Electric Energy ◽  
Electrical Energy ◽  
Electrical Energy Consumption ◽  
Power Requirement ◽  
Solar Module ◽  
Increasing Demand ◽  
Manual Calculation

The increasing demand for electrical energy in Bali requires additional electrical energy supply, while conventional energy such as petroleum, coal and natural gas continue to be used. Therefore, the utilization of non-conventional energy like solar energy should be increased. One of provision of non-conventional electric energy which is ready to be widely used is using PLTS Photovoltaic technology. The data analysis in this study uses manual calculation method to calculate electric power requirement, setting the result for electrical power, calculating the amount and capacity for solar module and inverter, calculating slope angle and location of solar module. PLTS uses a hybrid system with PLN, which works automatically to be controlled by the inverter control system. PLTS capacity of 148,274 kW supply 30% of the electrical energy consumption in the building of 2,310 MWh.

An autonomous micro-generation site using alternative/autonomous sources of electric energy

2020 ◽  
Vol 2 (4) ◽  
pp. 196-208
Author(s):  
A. S. Markov ◽  
K. A. Kolganov
Keyword(s):  
Power Plant ◽  
Power Supply ◽  
Energy Supply ◽  
Combustion Engine ◽  
Electric Energy ◽  
Combination Method ◽  
Effective Control ◽  
Hybrid Power ◽  
Hybrid Power Plant ◽  
Modular Platform

Introduction: the article deals with development and implementation of an autonomous, scalable and flexible-capacity micro-generation site representing a combination of various alternative sources of electric energy (up to 30 kW). The co-authors offer a solution for an autonomous micro-generation site: a prototype of a modular platform for a hybrid power plant (MPHP), which enables the use of solar and wind energies, capacitors, as well as an autonomous standby power supply unit having an internal combustion engine. The basic idea underlying the concept of a modular platform and the module combination method are substantiated. Power supply patterns that comprise MPHP are provided. Testing results, as well as the economic efficiency of a system operating in a decentralized energy supply environment are presented in the article.Methods: the study is based on the analysis of strengths, weaknesses and features of existing energy systems using alternative/autonomous sources of electric energy with a view to the extension of capabilities and capacity by means of connecting new generating sources.Findings and discussion: the results of development of an autonomous micro-generation site are presented; a prototype of a modular platform for a hybrid power plant (MPHP) is manufactured.Conclusion: the modular platform of a hybrid power plant enables to combine different types of electric energy sources and retain effective control over operating modes, thus improving the energy supply reliability and saving organic fuel consumed for the generation of 1 kWh of electricity.

scholarly journals Dynamic loading of electric machines during testing

2018 ◽  
Vol 7 (2.23) ◽  
pp. 184 ◽  
Author(s):  
Sergey I. Malafeev ◽  
Sergey S. Malafeev
Keyword(s):  
Power Supply ◽  
Energy Efficient ◽  
Electric Energy ◽  
Electrical Energy ◽  
Power Converter ◽  
Electric Machines ◽  
Electric Machine ◽  
Dynamic Mode ◽  
Electrical Machine ◽  
Simple Method

An energy-efficient and simple method of testing electric motors in a dynamic mode is considered. When testing an electrical machine, the rotor is driven into a reciprocating rotary motion. The source of power of the power converter, which controls the electric machine, is a supercapacitor. When the electric machine is accelerated, electric energy is consumed from the supercapacitor, when the machine brakes the kinetic energy of the moving masses is converted into electrical energy, which accumulates in the supercapacitor. The energy loss during the operation of the electromechanical system in the dynamic mode is compensated by recharging the supercapacitor using a controlled rectifier connected to the power supply network.

scholarly journals Study of Performance of RZhFA‑6500 Smoothing Reactors

2021 ◽  
Vol 18 (4) ◽  
pp. 72-83
Author(s):  
V. V. Lobyntsev ◽  
S. S. Polev ◽  
K. G. Mogilevsky
Keyword(s):  
Energy Efficiency ◽  
Power Supply ◽  
Electrical Energy ◽  
Traffic Volume ◽  
Ohmic Resistance ◽  
Train Operation ◽  
New Type ◽  
Traction Power Supply ◽  
Supply Systems ◽  
Traction Power

DC traction power supply systems have become widespread in several countries. Electricity consumption by traction power supply systems has pronounced seasonal and daily peaks. The peak nature of consumption leads to additional heating of live parts since time constants of transient thermal and electrophysical processes differ by several orders of magnitude, therefore, reducing ohmic resistance of electrical equipment, other things being equal, is an extremely important task.Within the framework of solving the problem of increasing energy efficiency of equipment of DC traction substations, smoothing reactor filter devices with an armoured radial-cylindrical magnetic core with low ohmic resistance, named RZhFA‑6500, were developed and manufactured.In 2018, two blocks of RZhFA‑6500 smoothing reactors were put into pilot operation at one of the most heavily loaded sections of DC electrified railways, providing traffic of trains weighing up to 9000 tons and traffic volume of about a hundred pairs of trains per day.To determine comparative indicators of energy efficiency, data on consumption of electric power for traction of trains for the compared periods before and after introduction of smoothing reactors of a new type were requested. The data received from JSC Russian Railways contained information on the traffic volume, type of rolling stock, and weight of the transported goods in accordance with the executed traffic schedule through section under consideration. The resulting set of data served as the basis for development of a multivariate methodology for assessing energy efficiency of reactors of a new type, as well as their contribution to efficiency of train operation over the considered comparative time interval. Since efficiency of power equipment also depends on the ambient temperature, the average integral parameter of average daily temperature was introduced into the calculation methodology, which, as it turned out, during processing initial data and construction of characteristic graphical dependencies, has a comparative difference of less than one percent for the same monitored periods.Accurate quantitative accounting of the data on consumption of electrical energy provided for traction of trains, exchange of reactive energy with the supply network, volume of transportation allowed to obtain an objective comparison of contribution of smoothing reactors of a new type to increasing efficiency of train operation and reducing consumption of electrical energy for traction of trains.

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