scholarly journals Microgrid analysis using HOMER: a case study

DYNA ◽  
2018 ◽  
Vol 85 (207) ◽  
pp. 129-134 ◽  
Author(s):  
David Restrepo ◽  
Bonie Restrepo ◽  
Luz Adriana Trejos-Grisales
Keyword(s):  
Renewable Energy Sources ◽  
Energy Systems ◽  
Weather Conditions ◽  
Photovoltaic System ◽  
Energy Sources ◽  
System A ◽  
Current Energy ◽  
Local Weather ◽  
Economic Studies

The integration of renewable energy sources to create microgrids is drawing growing interest to address current energy-related challenges around the globe. Nevertheless, microgrids must be analyzed using specialized tools that allow to conduct operation, technical and economic studies. In that regard, this paper presents a case study in which the software HOMER Energy Pro was implemented to design and analyze the performance of a microgrid. Such microgrid comprises a photovoltaic system, a wind system and a diesel plant. The parameters of the energy systems are based on information about local weather conditions available in databases. Finally, this analysis is performed under two conditions: stand-alone and grid-tied.

scholarly journals A Smart Adaptive Switching Module Architecture Using Fuzzy Logic for an Efficient Integration of Renewable Energy Sources. A Case Study of a RES System Located in Hulubești, Romania

2020 ◽  
Vol 12 (15) ◽  
pp. 6084
Author(s):  
Simona-Vasilica Oprea ◽  
Adela Bâra ◽  
Ștefan Preda ◽  
Osman Bulent Tor
Keyword(s):  
Fuzzy Logic ◽  
Renewable Energy ◽  
Power Systems ◽  
Electricity Generation ◽  
Renewable Energy Sources ◽  
Storage System ◽  
Weather Conditions ◽  
Energy Sources ◽  
Fuzzy Logic Systems

Electricity generation from renewable energy sources (RES) has a common feature, that is, it is fluctuating, available in certain amounts and only for some periods of time. Consuming this electricity when it is available should be a primary goal to enhance operation of the RES-powered generating units which are particularly operating in microgrids. Heavily influenced by weather parameters, RES-powered systems can benefit from implementation of sensors and fuzzy logic systems to dynamically adapt electric loads to the volatility of RES. This study attempts to answer the following question: How to efficiently integrate RES to power systems by means of sustainable energy solutions that involve sensors, fuzzy logic, and categorization of loads? A Smart Adaptive Switching Module (SASM) architecture, which efficiently uses electricity generation of local available RES by gradually switching electric appliances based on weather sensors, power forecast, storage system constraints and other parameters, is proposed. It is demonstrated that, without SASM, the RES generation is supposed to be curtailed in some cases, e.g., when batteries are fully charged, even though the weather conditions are favourable. In such cases, fuzzy rules of SASM securely mitigate curtailment of RES generation by supplying high power non-traditional storage appliances. A numerical case study is performed to demonstrate effectiveness of the proposed SASM architecture for a RES system located in Hulubești (Dâmbovița), Romania.

The Potential of Renewable Energy in the Republic of Moldova: A Case Study

2016 ◽  
Vol 841 ◽  
pp. 91-96
Author(s):  
Elena Simina Lakatos ◽  
Matthew Greenley ◽  
Laura Bacali ◽  
Mircea Boscoianu ◽  
Razvan Vaida
Keyword(s):  
Renewable Energy ◽  
Energy Dependence ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Structured Interviews ◽  
Country Report ◽  
Energy Dependency ◽  
The Republic ◽  
Current Energy

This article presents evidence to support the Republic of Moldova’s foreign energy dependence by providing information related to their current energy situation, energy imports and associated costs.The article places a specific emphasis on locating the primary origins and effects of Moldova’s energy dependency and examines the potential of renewable energy sources to diminish this energy dependency. In order to conduct the research for this article, data was collected through semi-structured interviews that were carried out in Moldova. Various energy experts and other officials and practitioners were interviewed. Information was also retrieved from a variety of sources that included the Moldova Country Report on Moldova’s Energy Sector and from the United Nations Development Program’s Moldova Energy and Biomass Project. The article shows that Moldova is in a position of energy dependence but there is potential from renewable energy sources to decrease this dependency.

A Framework for the Development of Technical Requirements for Renewable Energy Systems at a Small-Scale Airport Facility

2015 ◽  
Author(s):  
Troy V. Nguyen ◽  
Aldo Fabregas Ariza ◽  
Nicholas W. Miller ◽  
Ismael Cremer
Keyword(s):  
Renewable Energy ◽  
Renewable Energy Sources ◽  
Energy Systems ◽  
Clean Energy ◽  
Target System ◽  
Energy Sources ◽  
Small Scale ◽  
Renewable Energy Systems ◽  
Technical Requirements

Airports are key components of the global transportation system and are the subject of continuous sustainability improvements. Promoting clean energy sources and energy-efficient practices can help attain major sustainability goals at airports around the world. Although small airports are greater in number, most of the “sustainability” attention has been given to large airports. Small airports are typically located in rural areas, making them excellent candidates for renewable energy. This paper focuses on the planning and selection of renewable energy systems as a strategic method to reduce energy use and increase electric power reliability at small-scale airport facilities. The target system may use a combination of renewable energy sources to produce electrical power for the on-site facilities. The framework details include methods of energy collection, power production, and energy storage that are environmentally sound. A small airport serving a dual role as a flight training facility was used as case study. In the case study, systems engineering methodology was adapted to the small airport/ renewable energy domain in order to effectively identify stakeholders and elicit user requirements. These, coupled with industrial standards, relevant government regulations, and a priori constraints, are used to derive the initial requirements that serve as the basis for a preliminary design. The proposed framework also contains provisions for an on-site assessment of existing airport energy needs, sources, providers, and location-specific assets and challenges.

scholarly journals Enhanced Day-Ahead PV Power Forecast: Dataset Clustering for an Effective Artificial Neural Network Training

2021 ◽  
Vol 5 (1) ◽  
pp. 16
Author(s):  
Andrea Matteri ◽  
Emanuele Ogliari ◽  
Alfredo Nespoli
Keyword(s):  
Renewable Energy Sources ◽  
Weather Conditions ◽  
Energy Sources ◽  
Clustering Methods ◽  
Clustering Techniques ◽  
Network Training ◽  
Artificial Neural ◽  
Grid Operation ◽  
Artificial Neural Network Training

The increasing integration of renewable energy sources into the existing energy supply structure is challenging due to the intermittency typical of these energy sources, which implies problems of reliability and scheduling of grid operation. Concerning solar energy, the solar forecast tool predicts the photovoltaic (PV) power production and therefore permits a more efficient grid management. In this paper, the combination of clustering techniques and ANNs (Artificial Neural Networks) for day-ahead PV power forecast is analyzed. Clustering techniques are exploited to divide a dataset into different classes of days with similar weather conditions. Then, a dedicated ANN is developed for every group. The main goal is to assess the forecast improvement determined by the combination of ANNs and dataset clustering methods. Different combinations are compared on a real case study: a PV facility in SolarTechLAB, in Politecnico di Milano.

scholarly journals Interlinking the Renewable Electricity and Gas Sectors: A Techno-Economic Case Study for Austria

Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6289
Author(s):  
Christoph Sejkora ◽  
Johannes Lindorfer ◽  
Lisa Kühberger ◽  
Thomas Kienberger
Keyword(s):  
Renewable Energy Sources ◽  
Import Demand ◽  
Production Costs ◽  
Energy Sources ◽  
Transport Costs ◽  
Total Energy Consumption ◽  
Climate Neutrality ◽  
Current Energy ◽  
Roll Out

Achieving climate neutrality requires a massive transformation of current energy systems. Fossil energy sources must be replaced with renewable ones. Renewable energy sources with reasonable potential such as photovoltaics or wind power provide electricity. However, since chemical energy carriers are essential for various sectors and applications, the need for renewable gases comes more and more into focus. This paper determines the Austrian green hydrogen potential, produced exclusively from electricity surpluses. In combination with assumed sustainable methane production, the resulting renewable gas import demand is identified, based on two fully decarbonised scenarios for the investigated years 2030, 2040 and 2050. While in one scenario energy efficiency is maximised, in the other scenario significant behavioural changes are considered to reduce the total energy consumption. A techno-economic analysis is used to identify the economically reasonable national green hydrogen potential and to calculate the averaged levelised cost of hydrogen (LCOH2) for each scenario and considered year. Furthermore, roll-out curves for the necessary expansion of national electrolysis plants are presented. The results show that in 2050 about 43% of the national gas demand can be produced nationally and economically (34 TWh green hydrogen, 16 TWh sustainable methane). The resulting national hydrogen production costs are comparable to the expected import costs (including transport costs). The most important actions are the quick and extensive expansion of renewables and electrolysis plants both nationally and internationally.

scholarly journals Upholding Safety in Future Energy Systems: The Need for Systemic Risk Assessment

Energies ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 6523
Author(s):  
Ben Riemersma ◽  
Rolf Künneke ◽  
Genserik Reniers ◽  
Aad Correljé
Keyword(s):  
Risk Assessment ◽  
Renewable Energy ◽  
Systemic Risk ◽  
Process Analysis ◽  
Renewable Energy Sources ◽  
Energy Systems ◽  
Risk Assessments ◽  
Energy Sources ◽  
Sustained Use

This paper argues that energy systems are becoming increasingly complex, and illustrates how new types of hazards emerge from an ongoing transition towards renewable energy sources. It shows that the energy sector relies heavily on risk assessment methods that are analytic, and that systemic methods provide important additional insights. A case study of the Dutch gas sector illustrates this by comparing the hazard and operability study (HAZOP, analytic) with the system-theoretic process analysis (STPA, systemic). The contribution is twofold. This paper illustrates how system hazards will remain underestimated by sustained use of only analytic methods, and it highlights the need to study the organization of safety in energy transitions. We conclude that appropriate risk assessment for future energy systems involves both analytic and systemic risk assessments.

scholarly journals Dual Source Self Displaying Water Pumps

2020 ◽  
Vol 10 (1) ◽  
pp. 20-24
Keyword(s):  
Fossil Fuels ◽  
Solar Power ◽  
Renewable Energy Sources ◽  
Photovoltaic System ◽  
Energy Sources ◽  
System A ◽  
Display Unit ◽  
Dual Source ◽  
People Development ◽  
Water Pumps

Energy may be a key ingredient for the development of a nation. India is a country that is profusely endued with renewable energy sources. It is an outsized nation and the rate of electrification have not unsubdued speed with the increasing people, development and industrialisation has resulted in the increasing shortage between need and supply of electricity. Individuals who are not provided the facility grid need to be dependent on fossil fuels like diesel and petrol for his or her power wants and additionally incur significant revenant expenditure. We have taken initiative to design and implement a pump which will be operated on multiple energy sources. The pump is operated by taking power from the prevailing AC grid and facility taken from the standalone electrical photovoltaic system. The pump works on renewable solar power and whenever there is a shortage of solar power, it is switched to AC grid. Additionally, to the system, a self-display unit has been put in within the pump. This unit helps the buyer to observe the motor parameters like voltage, current and frequency any time. This unit helps in reducing the value for putting in a separate meter close to the starter of the pump. This increases the compactness of the pump.

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