Thermal modelling and reliability analysis of recently introduced high gain converters for PV application

Cleaner Energy Systems, Journal Year: 2022, Volume and Issue: 3, P. 100016 - 100016

Published: Aug. 30, 2022

High step-up DC-DC converter (HSDDC) topologies are getting more attention in hybridisation of energy sources especially for renewable integration. In the last decade, several high gain converters have been proposed; however, application-orientated development, and its thermal modelling comparative analysis associated with it, has unnoticed. Thus, intensive investigation terms performance attributes is crucial selection application orientated HSDDC topologies. A detailed analytical model recently reported presented this article. addition, comparison carried out based on different parameters. The models built PLECS simulation environment to ensure appropriate device handle normal abnormal situations topology. Finally, peak stress semiconductors measured validate efficacy each converters.

Language: Английский

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Adaptive Energy Management of Big Data Analytics in Smart Grids

Energies, Journal Year: 2023, Volume and Issue: 16(16), P. 6016 - 6016

Published: Aug. 17, 2023

The smart grid (SG) ensures the flow of electricity and data between suppliers consumers. reliability security also play an important role in overall management. This can be achieved with help adaptive energy management (AEM). research aims to highlight big issues challenges faced by AEM employed SG networks. In this paper, we will discuss most commonly used processing methods give a detailed comparison outputs some these methods. We consider dataset 50,000 instances from consumer meters 10,000 attributes previous fault 12 attributes. tell us about reliability, stability, accuracy system comparing output various graphical plots percentage linear regression method is 98%; for logistic method, it 96%; K-Nearest Neighbors, 92%. results show that applied gives highest compared Neighbors prediction analysis SGs. ensure their use future field.

Language: Английский

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An Optimized Hybrid Dragonfly Algorithm Applied for Solving the Optimal Reactive Power Dispatch Problem in Smart Grids

Published: Aug. 25, 2023

World's growing population has resulted in an up-surged demand for electricity worldwide. The resulting pressure on the power systems urged search measures to increase performance of distribution by minimizing loss, circumventing overload and reducing cost. implementation smart grid using artificial intelligence, combinatorial optimization techniques is one ways improve systems. Power grids including consist a number optimal flow problems, which Optimal Reactive Dispatch (ORPD) problem. It involves determining configurations curtail its ORPD problem may be solved means algorithms swarm intelligence algorithms. Dragonfly Algorithm (DA), high-performing algorithm, been successfully used solving However, DA can still amplified overcoming limitation having low exploitation phase. Previously, optimized algorithm with improved phase proposed. it not employed solve or enhance energy In this paper, we propose new further intensifying DA. This carried out utilizing steepest ascent hill climbing as local method instead stochastic algorithm. newly introduced making use standard test cases based experimental results, provides higher quality solutions comparison original DA, modified pathfinder

Language: Английский

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An analysis of barriers to the implementation of smart grid technology in Pakistan

Renewable Energy, Journal Year: 2023, Volume and Issue: 220, P. 119661 - 119661

Published: Nov. 21, 2023

The share of renewables in the energy mix Pakistan has gradually been increasing over past few years, and generated electricity is sufficient to cater consumer demands. However, almost one-third population still lacks because inefficiencies transmission distribution systems. To address this, government introduced smart grid projects that were ineffective. Therefore, for successful implementation Smart technology Pakistan, it important know barriers implementing determine their interrelationship with each other.This research aims identify Pakistan-specific through a mixed-methods approach involving literature review expert surveys based on interviews Google survey-based questionnaire, using Delphi method interlinkages. experts selected work relevance, experience, knowledge subject matter. Nine are identified: state monopoly, lack public awareness, relevant regulations policies, organizational barriers, financial constraints, market uncertainty, dearth technical human resources, modernized infrastructure, data management issues. This followed by developing hierarchical model consultation Pakistan's Energy sector Interpretive Structural Modeling (ISM) method. driving dependence powers identified determined MICMAC analysis. result shows nine interlinked at five levels. These are: 'State monopoly', 'lack awareness (level five)', policies four)', 'organizational (level-three)', 'market uncertainty (level-two)', 'Lack infrastructure', 'a resources', 'data issues (level-one)'. From we draw conclusion since high power influencing those less power, may be addressed sequentially starting from level-five Pakistan. existing Grid Implementation determination interlinkages between barriers. findings this will help stakeholders understand nature hindering enable them devise effective while simultaneously adopting intelligent operational strategies. Insights reported study could also useful policymakers other countries socioeconomic political contexts similar Further investigations performed Analytical Hierarchical Process quantify weights research, Equation used check validity developed study.

Language: Английский

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Mitigation of transient effects due to partial shading in a grid-connected photovoltaic farm through controlled vehicle to grid operation

Cleaner Energy Systems, Journal Year: 2023, Volume and Issue: 7, P. 100097 - 100097

Published: Dec. 12, 2023

Environmental issues and air pollution in urban areas are driving forces behind the shift to electric vehicles (EVs). The energy storage element of EVs can be used many effective ways, such as increasing spinning reserve, shaving peak load, load levelling, voltage regulation etc. So, establishing a smart grid with several renewable sources along integration is recent trend power systems. One commonly observed essential phenomena including PV system partial shading (PS), which implicates reduction solar irradiation over module, mainly due leaves or branches trees, clouds, dust. Though most previous researchers were concerned about steady state during PS, this research, we focused on transient impact grid-connected using controlled Vehicle Grid (V2G) operation EVs. A small-scale microgrid consisting farm diesel generator considered, where experiences different degrees varying from 30 70%. simulation results show that increase percentage overshoot (% OS) settling time rotor speed, active current increased. To mitigate issue, proposed plugged-in (PEVs), through V2G operation, done here by PI controller. improves effects at both sides. It has been found PS creates an oscillation settled down governor 20s, while reduced 10s. On side, % OS 4.24% 0.44% decreased 28s 18s PEVs.

Language: Английский

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Electromobility strategy on emerging economies: beyond selling electric vehicles

Cleaner Energy Systems, Journal Year: 2024, Volume and Issue: unknown, P. 100166 - 100166

Published: Nov. 1, 2024

Language: Английский

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Modeling global solar radiation using ambient temperature

Cleaner Energy Systems, Journal Year: 2023, Volume and Issue: 7, P. 100101 - 100101

Published: Dec. 17, 2023

Accurate information about solar radiation is regarded as the most important stage in determining availability of energy. As well, it considered principal input for various applications Because measurements are unavailable at many locations throughout world, models have been developed to predict global radiation. In this regard, study objects develop accurate and quick Global Solar Radiation (GSR) new locations, which currently lack an model. Additionally, assess performance a recently introduced model, one best temperature-based GSR estimation, these five sites. Moreover, proposed model's generalization capacity investigated over whole zone, Suez Canal Zone, comparative analysis its presented. Models' estimation compared observed values, common indicators obtained models' performance. The findings indicate that can accurately. Where performance, both local general models, larger than 95% all sites except Port Said City (coastal site), 91%. good RMSE MABE values range from 0.8 1.8 (MJ/m2 day−1) 0.7 1.7 day−1), successively. Besides, they excellent with coefficient determination (R2) ranging 0.95 0.98, whereas prior research's ranges 0.884–0.895 R2 2.69–3.367 RMSE. Therefore, be utilized forecast, their high applicability may achieved by combining them long- or short-term weather forecasting approaches, mostly used reliably anticipate temperature. precise speedy computation also employed design evaluation applications.

Language: Английский

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Novel control framework for optimal scheduling in microgrid with demand response support under contingency events

Cleaner Energy Systems, Journal Year: 2022, Volume and Issue: 3, P. 100019 - 100019

Published: Sept. 18, 2022

Language: Английский

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Unlocking renewable energy potential: A case study of solar and wind site selection in the Kasserine region, central‐western Tunisia

Energy Science & Engineering, Journal Year: 2023, Volume and Issue: 12(3), P. 771 - 792

Published: Dec. 28, 2023

Abstract Developing wind and solar photovoltaics on a large scale requires substantial financial investments, making it crucial to identify the most suitable locations beforehand. To address this issue, spatial analysis is carried out determine potential sites for hosting large‐scale photovoltaic systems in region of Kasserine, central‐western Tunisia. end, an integrated model based Step‐wise Assessment Ratio Analysis (SWARA), Decision‐Making Trial Evaluation Laboratory (DEMATEL), Geographic Information System proposed. An extensive literature survey conducted establish suitability criteria constraints. The SWARA‐DEMATEL used assign weights capture interdependencies among considered criteria, while raster calculator tool from ArcGis 10.8 software utilized extract final maps. obtained results indicate that Kasserine exhibits great potential, with areas 635 467 km 2 extremely fit installing systems, respectively. Furthermore, 349 are identified as solar‐wind hybrid systems. Considering these outcomes, policymakers can take initiative accelerate deployment facilities, which would assist country achieving its plans by 2030.

Language: Английский

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Electricity Theft in Sub-Saharan Africa: A review

Published: Jan. 24, 2024

Electricity theft is a significant challenge for energy distributors worldwide, leading to high distribution costs and rising expenditures. In South Africa, most rely on utilities like Eskom deliver their energy, which them money. also affects local governments or distributors, affecting daily operations reducing personnel capability. The lack of load-limiting devices illegal connections further strains the utility network, negatively impacting economy. paper presents an overview electricity in developing countries focusing mainly Sub-Saharan Africa (SSA). Furthermore, it aims recognize impact SSA economy, municipalities, utilities.

Language: Английский

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