scholarly journals One Cycle Controlled Single–Stage Transformerless Buck-Boost Inverter

2020 ◽  
Vol 9 (5) ◽  
pp. 58-63
Keyword(s):  
Energy Source ◽  
Renewable Energy ◽  
Renewable Energy Sources ◽  
Weather Condition ◽  
Input Voltage ◽  
Energy Sources ◽  
Test Results ◽  
Simulink Model ◽  
Test Conditions ◽  
Input Side

The rate of utilization of renewable energy sources is increasing nowadays. Since renewable energy source depends on environmental conditions, its output will vary according to the variations of weather condition. In order to get a steady output at the load side, an inverter is required that shows the property of bucking and boosting the input voltage by eliminating the input disturbances. This paper proposes one cycle controlled buckboost inverter. It has the ability to buck and boost the input voltage by rejecting its disturbances. The detailed Matlab/Simulink model has been used to verify the performance of the system. Three test conditions are used to substantiate the performance of the proposed inverter such as the ability to buck and boost the input voltage, rejects the disturbances in the input side. Test results validate that the proposed inverter used for the applications where input varies.

scholarly journals Interaction Boundary Determination of Renewable Energy Sources to Estimate System Strength Using the Power Flow Tracing Strategy

2021 ◽  
Vol 13 (3) ◽  
pp. 1569
Author(s):  
Namki Choi ◽  
Byongjun Lee ◽  
Dohyuk Kim ◽  
Suchul Nam
Keyword(s):  
Renewable Energy ◽  
Power Flow ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Test Results ◽  
Boundary Determination ◽  
Actual Interaction ◽  
Power Flow Tracing ◽  
Estimate System

System strength is an important concept in the integration of renewable energy sources (RESs). However, evaluating system strength is becoming more ambiguous due to the interaction of RESs. This paper proposes a novel scheme to define the actual interaction boundaries of RESs using the power flow tracing strategy. Based on the proposed method, the interaction boundaries of RESs were identified at the southwest side of Korea Electric Power Corporation (KEPCO) systems. The test results show that the proposed approach always provides the identical interaction boundaries of RESs in KEPCO systems, compared to the Electric Reliability Council of Texas (ERCOT) method. The consistent boundaries could be a guideline for power-system planners to assess more accurate system strength, considering the actual interactions of the RESs.

Use of the Savonius Wind Turbine for the Needs of Public Lighting

2014 ◽  
Vol 1008-1009 ◽  
pp. 179-182
Author(s):  
Iveta Gressová
Keyword(s):  
Energy Source ◽  
Renewable Energy ◽  
Wind Energy ◽  
Wind Turbine ◽  
Energy Use ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Geothermal Heat ◽  
Current Generation ◽  
Savonius Wind Turbine

Our planet gives us many mineral sources, but they have a big disadvantage. They are finite. Non-renewable energy sources are enough only for decades, exceptionally for centuries. Current generation is aware of the importance of using other energy sources, such as sunlight, wind, rain, tides, waves and geothermal heat. These energy sources are renewable. It means that they come from sources, which are naturally replenished on a human timescale. One of these sources is wind energy. Use of this kind of energy source needs an initial investment, but it can reduce cost of running a household and other sectors. This article is about Savonius wind turbine and its use for the needs of public lighting.

Considerations on Economic Optimization of the Relationship Insulation - Thermal Energy Sources Insurance for Civil Building

2014 ◽  
Vol 659 ◽  
pp. 463-468
Author(s):  
Adrian Alexandru Şerbănoiu ◽  
Gabriel Teodoriu ◽  
Bogdan Serbanoiu ◽  
Ion Serbanoiu ◽  
Marina Verdeș ◽  
...  
Keyword(s):  
Energy Source ◽  
Renewable Energy ◽  
Thermal Energy ◽  
Renewable Energy Sources ◽  
Building Envelope ◽  
Energy Sources ◽  
Economic Optimization ◽  
Major Objective ◽  
Financial Perspective ◽  
The Relationship

The major objective of this paper is to optimize the relationship insurance energy source - high thermal insulation of the building envelope analyzed in order to minimize the financial effort incurred by the beneficiary. In this respect, the paper proposes a methodology for analyzing the financial perspective of the relation envelope - equipment that capitalizes renewable energy sources, built on a newer concept - optimal cost.

scholarly journals Prerequisites for the resumption of the growth rate of hydrogen energy, a review of foreign experience and prospects for development in Russia

2021 ◽  
pp. 131-136
Author(s):  
A. S. Prozorov ◽  
E. O. Kalmykova
Keyword(s):  
Energy Source ◽  
Growth Rate ◽  
Renewable Energy ◽  
Retrospective Analysis ◽  
World Economy ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Hydrogen Energy ◽  
Foreign Experience ◽  
The World

At the beginning of the XXI century environmental problems began to have an integrated impact on various regions of our planet. The agenda of major international forums addresses issues related to their solution with the active use of renewable energy sources, including the expansion of the use of hydrogen in various sectors of the world economy. The article provides a brief overview on the prerequisites for the resumption of interest in the use of hydrogen as an energy source, a review of foreign experience in terms of regulatory regulation and incentives, as well as a retrospective analysis of domestic experience in the use of hydrogen and the prospects for the development of hydrogen energy in modern Russian realities. 

scholarly journals Fault Diagnosis in Hybrid Renewable Energy Sources with Machine Learning Approach

2021 ◽  
Vol 3 (3) ◽  
pp. 222-237
Author(s):  
Haoxiang Wang
Keyword(s):  
Machine Learning ◽  
Energy Source ◽  
Renewable Energy ◽  
Rural Areas ◽  
Renewable Energy Sources ◽  
Energy Resource ◽  
Reference Value ◽  
Energy Resources ◽  
Energy Sources ◽  
Hybrid Renewable Energy

In recent days the need for energy resources is dramatically increasing world-wide. Overall 80% of the energy resource is supplied in the form of fuel based energy source and nuclear based energy source. Where fuel based energy resources are very essential in day-to-day life. Fossil fuel is also one among the energy resource and due to the high demand we face shortage in these resources. Providing electricity in rural areas is still a difficult process because of the shortage of energy resources. This issue can be rectified by choosing an alternate to electricity. To achieve this we have integrated many renewable energy sources to form a hybrid-renewable energy source system and this is capable of providing power supply to these areas. We have adopted artificial neural networks (ANN) technique based on machine learning to accomplish this process. For short-term prediction other techniques such as MLP, CNN, RNN and LSTM are used. These values are used as reference value in final execution.

scholarly journals A Robot System Maintained with Small Scale Distributed Energy Sources

Energies ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3851
Author(s):  
Kim ◽  
Moon
Keyword(s):  
Energy Source ◽  
Renewable Energy ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Small Scale ◽  
Large Area ◽  
Robot System ◽  
Contact Charging ◽  
Charge Model ◽  
A Charge

An energy autonomy system is sustained by energy from independent and distributed sources. This paper presents a robot system that obtains energy from renewable energy sources distributed over a large area with limited storage capacity. We constructed a linearized charge model to estimate the required energy node capacity and distribution for the robot to survive. For a robot to obtain energy from an energy source, it must be able to recognize the energy node and able to receive energy reliably. We used wireless power transfer to solve conventional contact charging problems, such as mechanical complexity and unstable contact, and image information was used to recognize the energy nodes and align the transmission coils accurately. A small scale renewable energy source was constructed and a charge experiment was conducted to verify the proposed autonomy system feasibility.

scholarly journals Towards a Renewable Energy Source Cadastre—A Review of Examples from around the World

Energies ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 8095
Author(s):  
Agnieszka Bieda ◽  
Agnieszka Cienciała
Keyword(s):  
Energy Source ◽  
Renewable Energy Source ◽  
Renewable Energy ◽  
Spatial Information ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Energy Potential ◽  
The Creation ◽  
Alternative Sources ◽  
Climate Crisis

In the age of the impending climate crisis, and further forecast ecological catastrophes, humankind has begun to think with growing interest about replacing existing energy sources with renewable ones. An increasing number of people have begun to discuss the need to implement registries that collect information about the energy potential of specific parts of the environment we live in. Additionally, the simultaneous registration of installations used for obtaining energy from alternative sources is desirable. In addition to quantitative attributes, such databases should also contain comprehensive spatial information. Since, in the era of globalization, the creation of such databases ought to be standardized, the purpose of this study is to indicate the directions in which the cadastre of renewable energy sources should be developed by: (i) reviewing the solutions of renewable energy sources that have been described in the scientific literature; (ii) analyzing the content of selected geoportals containing data on renewable energy sources. The literature review was preceded by a detailed bio-metric analysis, whereas the content analysis of the geoportals led to the creation of a flow chart containing a proposal for a renewable energy source cadastre, and a ranking of the analyzed portals. Nevertheless, the conceptual work was limited to the solar cadastre only.

scholarly journals The use of agricultural waste for the renewable energy production

2019 ◽  
pp. 138-144 ◽  
Author(s):  
Anita Zapalowska ◽  
Ulyana Bashutska
Keyword(s):  
Energy Source ◽  
Renewable Energy ◽  
Power Plants ◽  
Biogas Production ◽  
Renewable Energy Sources ◽  
Agricultural Waste ◽  
Energy Sources ◽  
Key Technology ◽  
Advantages And Disadvantages ◽  
Biogas Plants

In addition to hydroelectric power plants, solar and wind power plants, biogas plants are important in the production of electricity and heat from renewable energy sources. It is known that depending on the type of substrate used for processing and the design features of biogas plants, they have their own advantages and disadvantages. Nevertheless, properly localized biomass installation is able to decrease the use of conventional materials reducing greenhouse gas emissions. Bio-waste, plant residues and other by-products can be used to produce electricity, heat and purified methane as fuel for repaired vehicles. Biogas production is a key technology for the sustainable use of agricultural biomass as a renewable energy source. Both, Poland and Ukraine, have a large agricultural area, and well developed animal cattery, which creates opportunities for alternative energy sources from biomass development.          Agricultural biogas plant energy produced from waste such manure, slurry and another agricultural waste, is an excellent source of heat, likewise, electricity. Therefore the importance of using agricultural waste as an energy source in the production of biogas shall be emphasized. A significant drawback of the system is the need to provide low economic and environmental losses. For this purpose, the place of biomass harvesting, transport and its preparation together with storage should be taken into account. To achieve the highest efficiency, small biogas plants should have permanent composition of substrate consisting of various ingredients.                 Ukraine and Poland has considerable potential of renewable energy sources development of which can provide significant economic, ecological, and social benefits. The production of biogas has become an attractive source of extra income for many farmers. Biogas production has a useful effect not only on economic, but ecological development, particularly in the rural regions. At the same time, environmental protection aspects have gained additional importance, so that anaerobic treatment processes have become a key technology for environmental and climate protection.          On the basis of the submitted documentation by the municipal administration and the manufacturer, the operation of biogas plants for the processing of organic agricultural waste in Gorajec and Odrzechowa (Poland) has been presented.

scholarly journals GENERALIZED APPROACH FOR FEASIBILITY STUDY OF HYBRID SYSTEMS WITH RENEWABLE ENERGY SOURCES

2018 ◽  
pp. 64-73
Author(s):  
Ivan Bachev ◽  
Boris Demirkov ◽  
Ludmil Stoyanov ◽  
Vladimir Lazarov ◽  
Zahari Zarkov ◽  
...  
Keyword(s):  
Energy Source ◽  
Renewable Energy Source ◽  
Renewable Energy ◽  
Hybrid System ◽  
Energy Exchange ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Storage Devices ◽  
Wind Generators ◽  
Photovoltaic Generators

The purpose of this work is to assess the energies produced by a hybrid system composed of photovoltaic generators and wind turbines. This study aims to develop a method, which could facilitate the sizing of photovoltaic and wind generators in a given hybrid system. The proposed method could also help with the sizing of storage devices in the hybrid system, which provide energy for the consumer in moments when the primary renewable energy source is lacking or for sizing the energy exchange with the grid.

scholarly journals The comparison of thermal comfort test results in selected traditional and modern buildings

2021 ◽  
Vol 286 ◽  
pp. 02008
Author(s):  
Natalia Krawczyk ◽  
Justyna Krakowiak
Keyword(s):  
Renewable Energy ◽  
Thermal Comfort ◽  
Indoor Air ◽  
Electricity Generation ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Test Results ◽  
Intelligent Building ◽  
Heating And Cooling ◽  
University Of Technology

The use of renewable energy sources in buildings is more and more common (both for heating and cooling purposes, as well as electricity generation). The paper focuses on the thermal comfort tests in two buildings: the traditional one (that uses non-renewable sources of energy) and the modern intelligent building “Energis” of Kielce University of Technology. The thermal sensations of students in these two buildings have been compared based on the questionnaire survey and conclusions have been drawn regarding the differences between the feelings of thermal comfort in those two buildings. Apart from subjective feelings of the volunteers, the measurements of indoor air parameters were conducted in both buildings and have been presented in the paper.

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