International Journal of Energy Research最新文献

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Lyapunov-Based Novel Integral Backstepping and Integral Sliding Mode Controllers Design for Efficient Voltage Regulation of Resilient DC Microgrid
IF 4.3 3区 工程技术
International Journal of Energy Research Pub Date : 2025-02-20 DOI: 10.1155/er/8849426
Fozia Feroze, Kamran Zeb, Waqar Uddin, Muhammad Imran, Muhammad Khalid, Zahid Ullah
{"title":"Lyapunov-Based Novel Integral Backstepping and Integral Sliding Mode Controllers Design for Efficient Voltage Regulation of Resilient DC Microgrid","authors":"Fozia Feroze,&nbsp;Kamran Zeb,&nbsp;Waqar Uddin,&nbsp;Muhammad Imran,&nbsp;Muhammad Khalid,&nbsp;Zahid Ullah","doi":"10.1155/er/8849426","DOIUrl":"https://doi.org/10.1155/er/8849426","url":null,"abstract":"<div>\u0000 <p>Microgrids (MGs) offer a more efficient and reliable energy provision than conventional grids due to their ability to function autonomously from the primary grid. This work investigates a stand-alone direct current MG (DCMG) with multipower sources of photovoltaic (PV), wind, and storage devices such as batteries, ultracapacitors (UCs), and hydrogen technology. Voltage stability is a critical challenge for a DCMG rigorously controlled by the DC/DC converters. Since converters exhibit nonlinear characteristics and are uncertain about renewable energy resources (RESs), a robust control mechanism is required. Further, traditional controllers encounter difficulties with system parameter variation and load deviations. Hence, a novel integral backstepping controller (IBC) and integral sliding mode controller (ISMC) are designed to achieve two main objectives: power balance and bus voltage regulation of DCMG. Moreover, the Lyapunov stability criterion ensures the asymptotic stability of the designed system. Simulations are carried out in MATLAB/Simulink, and the performance of the controllers is verified by comparing the IBC results with ISMC and conventional SMCs. Results confirm that the proposed controllers are reliable, more accurate, stable, and robust compared with SMC. Also, a processor-in-loop (PIL) experiment is performed further to verify the real-time efficacy of the designed DCMG.</p>\u0000 </div>","PeriodicalId":14051,"journal":{"name":"International Journal of Energy Research","volume":"2025 1","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/er/8849426","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143446672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Assessing the Economic Impacts of Net Metering on Residential Solar Photovoltaic Adoption: A Palestinian Case Study
IF 4.3 3区 工程技术
International Journal of Energy Research Pub Date : 2025-02-19 DOI: 10.1155/er/1370101
Moien A. Omar
{"title":"Assessing the Economic Impacts of Net Metering on Residential Solar Photovoltaic Adoption: A Palestinian Case Study","authors":"Moien A. Omar","doi":"10.1155/er/1370101","DOIUrl":"https://doi.org/10.1155/er/1370101","url":null,"abstract":"<div>\u0000 <p>This research evaluates impacts of net metering on residential photovoltaic (PV) adoption in Palestine, focusing on PV systems ranging from 2 to 5 kWp. The analysis considers key factors such as energy generation, self-consumption, self-sufficiency, and economic viability, with PV coverage meeting an annual demand of 6378 kWh. Under the current net-metering scheme, 10% discounted of exported energy, and unused energy is forfeited at year end. The 2 kWp system generated 3405 kWh annually, achieving a self-consumption rate of 63% and covering 35% of household energy needs. Conversely, the 5 kWp system produced 8514 kWh but exhibited a lower self-consumption rate of 31% and a self-sufficiency rate of 43%. In terms of economic performance, the 2 kWp system delivered the highest internal rate of return (IRR) at 23.60% and a discounted payback period (DPP) of 4.95 years. Meanwhile, the 3 kWp and 4 kWp systems demonstrated IRRs of 23.1% and 22.76%, with DPPs of 5.07 and 5.15 years, respectively. Although the 4 kWp system had a higher net present value of $5,626.8 compared to $2968.2 for the 2 kWp system, the latter remained more efficient with a higher IRR of 23.60%, vs. 22.76% for the 4 kWp system, suggesting that the 4 kWp system offers greater overall profit, but the 2 kWp system yields better returns on investment. Nevertheless, the 5 kWp system, despite generating the most energy, had the lowest IRR at 16.72% and the longest DPP of 7.20 years due to discounted and forfeited credits at year end. Therefore, the study recommends that households install PV systems closely aligned with their energy consumption to maximize self-consumption.</p>\u0000 </div>","PeriodicalId":14051,"journal":{"name":"International Journal of Energy Research","volume":"2025 1","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/er/1370101","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143439156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Open-Circuit Fault Detection Strategy in Grid-Tied NPC Inverters Using Distorted Current and Model Predictive Control
IF 4.3 3区 工程技术
International Journal of Energy Research Pub Date : 2025-02-19 DOI: 10.1155/er/6678119
Hadjira Mechri, Aissa Kheldoun, Mohamed Tamim Touati, Soufiane Khettab, Abdelkarim Ammar, Youcef Belkhier, Nima Khosravi, Adel Oubelaid
{"title":"Open-Circuit Fault Detection Strategy in Grid-Tied NPC Inverters Using Distorted Current and Model Predictive Control","authors":"Hadjira Mechri,&nbsp;Aissa Kheldoun,&nbsp;Mohamed Tamim Touati,&nbsp;Soufiane Khettab,&nbsp;Abdelkarim Ammar,&nbsp;Youcef Belkhier,&nbsp;Nima Khosravi,&nbsp;Adel Oubelaid","doi":"10.1155/er/6678119","DOIUrl":"https://doi.org/10.1155/er/6678119","url":null,"abstract":"<div>\u0000 <p>Investigating and addressing fault detection is crucial for advancing the reliability, performance, and cost-effectiveness of grid-connected inverter systems, thereby contributing to the stability and efficiency of modern power grids. This study introduces a novel approach for detecting and classifying open-circuit faults (OCFs) in three-level neutral point clamped (3-L-NPC) inverters connected to the grid. The proposed algorithm swiftly identifies faulty switches and clamping diodes using distorted current signals and model predictive control (MPC), eliminating the need for additional hardware or complex computations. By addressing the challenge of identifying the specific switch under grid-connected conditions, the proposed method achieves faster detection and identification of all switches and clamping diodes in less than one fundamental period which is very good compared with recent studies and considering that no extra sensors are used. Furthermore, this work demonstrates the efficacy of MPC in tolerating OCFs in clamping diodes, showcasing its potential to enhance system resilience and performance. The proposed strategy significantly improves the reliability of 3-L-NPC inverters by ensuring prompt and accurate fault detection and classification. Both experimental and simulation results confirm the efficacy of the suggested fault detection and identification approach, emphasizing its practical applicability in real-world grid-tied inverter systems.</p>\u0000 </div>","PeriodicalId":14051,"journal":{"name":"International Journal of Energy Research","volume":"2025 1","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/er/6678119","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143439170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Development of CoTe2, CoS2, and CoSe2 Electrode Material for the Asymmetric Supercapacitors
IF 4.3 3区 工程技术
International Journal of Energy Research Pub Date : 2025-02-18 DOI: 10.1155/er/5553294
Dhanasekaran Vikraman, Sajjad Hussain, K. Karuppasamy, Anandhavelu Sanmugam, A. Kathalingam, Ramu Manikandan, Jongwan Jung, Akram Alfantazi, Hyun-Seok Kim
{"title":"Development of CoTe2, CoS2, and CoSe2 Electrode Material for the Asymmetric Supercapacitors","authors":"Dhanasekaran Vikraman,&nbsp;Sajjad Hussain,&nbsp;K. Karuppasamy,&nbsp;Anandhavelu Sanmugam,&nbsp;A. Kathalingam,&nbsp;Ramu Manikandan,&nbsp;Jongwan Jung,&nbsp;Akram Alfantazi,&nbsp;Hyun-Seok Kim","doi":"10.1155/er/5553294","DOIUrl":"https://doi.org/10.1155/er/5553294","url":null,"abstract":"<div>\u0000 <p>Supercapacitors play a crucial role in electrical energy storage and conversion applications today due to their high power density and ability to integrate with various energy conversion devices. Many efforts have been made to address issues such as low energy density and finding efficient electrode materials to achieve high capacitances. Layered transition metal dichalcogenides have shown great potential in energy storage applications because of their numerous active edges, diverse electrochemical kinetics, and unique sandwich structure. Therefore, researchers have been exploring a meticulous method to formulate multiscale CoS<sub>2</sub>, CoSe<sub>2</sub>, and CoTe<sub>2</sub> nanoarchitectures to enhance the storage characteristics of supercapacitors. This study employed a single-step facile chemical reaction method to form CoSe<sub>2</sub>, CoTe<sub>2</sub>, and CoS<sub>2</sub> nanostructures. The synthesized CoTe<sub>2</sub> material demonstrated a specific capacity of 370 C g<sup>−1</sup> at 1 A g<sup>−1</sup> alongside reliable cycling robustness over 10,000 cycles (98%), superior to CoSe<sub>2</sub> and CoS<sub>2</sub> electrodes. An alkaline hybrid asymmetric supercapacitor based on CoTe<sub>2</sub> achieved a 157 F g<sup>−1</sup> specific capacitance with 56 Wh kg<sup>−1</sup> specific energy and a long cycling life of 97% capacitance retaining over 10,000 cycles. These findings reveal the significant potential of cobalt chalcogenide nanostructures to be applied as prototype electrodes for supercapacitor devices.</p>\u0000 </div>","PeriodicalId":14051,"journal":{"name":"International Journal of Energy Research","volume":"2025 1","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/er/5553294","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optimized Selection of Renewable Energy Sources Based on Regional Potentials in Colombia: A Comparative Analysis of AHP and FAHP for Sustainable Development
IF 4.3 3区 工程技术
International Journal of Energy Research Pub Date : 2025-02-18 DOI: 10.1155/er/9257724
Christian Manuel Moreno Rocha, Daina Arenas Buelvas, Itzjak Vega Machado, Juan Pacheco Peña
{"title":"Optimized Selection of Renewable Energy Sources Based on Regional Potentials in Colombia: A Comparative Analysis of AHP and FAHP for Sustainable Development","authors":"Christian Manuel Moreno Rocha,&nbsp;Daina Arenas Buelvas,&nbsp;Itzjak Vega Machado,&nbsp;Juan Pacheco Peña","doi":"10.1155/er/9257724","DOIUrl":"https://doi.org/10.1155/er/9257724","url":null,"abstract":"<div>\u0000 <p>This study evaluates alternatives using the analytic hierarchy process (AHP) and Fuzzy AHP (FAHP) methodologies across five scenarios (SC1 to SC5), aiming to compare the effectiveness of both approaches in integrating environmental and technical criteria. The results indicate that, in SC1, AHP assigns weights of 14.35% to A1 and 16.22% to A2, while FAHP demonstrates greater dispersion, highlighting A6 with 35.22%. In SC2, AHP prioritizes A1 with 14.16%, whereas FAHP increases the weight of the environmental criterion to 21.18%. In SC3, A1 remains the preferred option in both methodologies, with close weights of 34.00% for AHP and 32.98% for FAHP. In SC4, both methods show similar trends, with A1 standing out at 11.12% and A4 at 34.87%. Finally, in SC5, AHP allocates 8.52% to A1, while FAHP evaluates it at 10.73%. The findings suggest that FAHP allows greater sensitivity to variations in sub-criteria, enabling a more precise evaluation aligned with sustainability objectives. The significance of environmental and social criteria across the scenarios underscores the necessity of incorporating more sustainable approaches into decision-making processes. It is concluded that, while AHP delivers consistent results, FAHP may be better suited for contexts characterized by complexity and uncertainty. Furthermore, sensitivity analysis is recommended to examine how variations in criterion weights impact final decisions.</p>\u0000 </div>","PeriodicalId":14051,"journal":{"name":"International Journal of Energy Research","volume":"2025 1","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/er/9257724","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Emerging Trends and Future Prospects of Thermochemical Energy Storage Systems for Building Space and Water Heating Applications
IF 4.3 3区 工程技术
International Journal of Energy Research Pub Date : 2025-02-17 DOI: 10.1155/er/6685290
Ankammarao Padamurthy, Praveen Kumar Gandla, Amar Sheelwant, Harinadh Vemanaboina, Prabhu Paramasivam, Abinet Gosaye Ayanie
{"title":"Emerging Trends and Future Prospects of Thermochemical Energy Storage Systems for Building Space and Water Heating Applications","authors":"Ankammarao Padamurthy,&nbsp;Praveen Kumar Gandla,&nbsp;Amar Sheelwant,&nbsp;Harinadh Vemanaboina,&nbsp;Prabhu Paramasivam,&nbsp;Abinet Gosaye Ayanie","doi":"10.1155/er/6685290","DOIUrl":"https://doi.org/10.1155/er/6685290","url":null,"abstract":"<div>\u0000 <p>The thermal energy storage (TES) technology has gained so much popularity in recent years as a practical way to close the energy supply–demand gap. Due to its higher energy storage density and long-term storage, thermochemical energy storage (TCES), one of the TES methods currently in use, seems to be a promising one. These potential advantages have triggered to undertake a decent amount of research investigations in the past few years. The present review paper summarizes the recent outcomes of TCES systems for building water and space heating applications and demonstrates the different kinds of systems and their configuration arrangements. The recently developed experimental as well as theoretical prototypes are looked over with respect to their arrangement (closed and open loop) and role of relevant operating conditions. Various kinds of reactor shapes are also summarized and presented. Critical issues like materials’ achievable heat storage density/capacity, stability/cyclability, charging temperature, and systems’ mass and heat transfer properties are discussed. This work also presents the current challenges and the possible suggestions to address them. This review suggests that additional research is necessary to determine the role of influencing parameters in the design and establishment of TCES prototypes for building’s water and space heating applications.</p>\u0000 </div>","PeriodicalId":14051,"journal":{"name":"International Journal of Energy Research","volume":"2025 1","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/er/6685290","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143424172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Wind, PV, and Hybrid Power Plant Operation in Competitive Nordic Electricity Market With High Profit Cannibalization
IF 4.3 3区 工程技术
International Journal of Energy Research Pub Date : 2025-02-17 DOI: 10.1155/er/8850556
Simeon Seppälä, Sanna Syri
{"title":"Wind, PV, and Hybrid Power Plant Operation in Competitive Nordic Electricity Market With High Profit Cannibalization","authors":"Simeon Seppälä,&nbsp;Sanna Syri","doi":"10.1155/er/8850556","DOIUrl":"https://doi.org/10.1155/er/8850556","url":null,"abstract":"<div>\u0000 <p>This study presents a technoeconomic analysis of a hybrid wind-PV (photovoltaic) power plant (HPP) compared to onshore wind power plants (WPPs) and photovoltaic power plants (PVPPs) in the Nordic electricity market, focusing on locations in Finland and Sweden. Wind power capacity has recently increased significantly in the Nordics, increasing the profit cannibalization of wind power. Renewable energy subsidies have been phased out in Finland and Sweden, thus new wind and PV power value creation is formed from the power market. The PV power capacity has also encountered significant growth in the Nordics. However, the capacity is still relatively low, allowing more revenue for produced PV power compared to wind power. The lower PV power profit cannibalization has increased interest in HPPs instead of WPPs. This contribution studies the economic feasibility of wind and PV power in changing market conditions in the Nordic electricity market. The market operation is modeled with three different configurations including selling all the power into the day ahead spot market and baseload or pay-as-produced power purchase agreement (PPA). In addition, a battery energy storage system (BESS) investment is analyzed using the operating strategy of shifting production to more profitable spot price hours. This study shows that due to the profit cannibalization and high cost of capital, the power plants are currently not profitable in the Nordic electricity market except when the bidding area has high average spot prices. The worst profitability was with WPPs when exposed to the market shape risk and with PVPPs when pay-as-produced PPA was agreed upon due to the higher levelized cost of electricity. However, the PV power profit cannibalization is expected to increase in the future as more PVPPs operate in the Nordic power market. Thus, the PVPP shape risk may increase in the future as well.</p>\u0000 </div>","PeriodicalId":14051,"journal":{"name":"International Journal of Energy Research","volume":"2025 1","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/er/8850556","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Two-Stage Optimal Operation of Integrated Energy System Considering Electricity–Heat Demand Response and Time-of-Use Energy Price
IF 4.3 3区 工程技术
International Journal of Energy Research Pub Date : 2025-02-16 DOI: 10.1155/er/6106019
Xiuyun Wang, Yang Jiao, Benwang Cui, Hongbin Zhu, Rutian Wang
{"title":"Two-Stage Optimal Operation of Integrated Energy System Considering Electricity–Heat Demand Response and Time-of-Use Energy Price","authors":"Xiuyun Wang,&nbsp;Yang Jiao,&nbsp;Benwang Cui,&nbsp;Hongbin Zhu,&nbsp;Rutian Wang","doi":"10.1155/er/6106019","DOIUrl":"https://doi.org/10.1155/er/6106019","url":null,"abstract":"<div>\u0000 <p>Integrated energy systems (IESs) can realize the conversion and complementarity of various energy sources, which provides opportunities and challenges for the energy market. Considering that the user’s energy consumption is affected by the energy price difference, there is a problem that the new energy output in the comprehensive energy system does not fully match the user’s energy demand period. In order to solve the above problems, this paper proposes a two-stage optimization model of “open source and reducing expenditure” to give full play to the potential of multiple energy sources on the load side to participate in demand response (DR) and combine low-carbon technology and market mechanisms to realize the low-carbon economic operation of the comprehensive energy system. In the first stage, a collaborative optimization strategy for electric and thermal DR is constructed from the aspect of “reducing expenditure,” a comprehensive load fuzzy DR mechanism based on the logistic function is constructed for electric load, and the load curve and time-of-use (TOU) energy price are optimized considering the coupling characteristics of user energy consumption, and nondominated sorting genetic algorithm (NSGA-II) solution to achieve peak shaving and valley filling. In the second stage, a joint operation model of carbon capture power plant (CCPP) and power-to-gas (P2G) equipment is built from the aspect of “open source,” and the ladder-type carbon trading mechanism is considered to rationalize the unit output and achieve low-carbon emission reduction. The calculation results obtained through examples show that the total cost of the model is slightly reduced by 5.44%, but the actual total carbon emission of the system is greatly increased by 50.73%. It proves that the high-carbon power plant transformation and TOU energy price optimization strategy are effective for the low-carbon economic operation of the system and realize both economic benefits and benefits of the system.</p>\u0000 </div>","PeriodicalId":14051,"journal":{"name":"International Journal of Energy Research","volume":"2025 1","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/er/6106019","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Computational Modeling of Grid-Connected Double-Chamber Microbial Fuel Cell (DCMFC) Bioenergy Utilizing MATLAB Simulink Software
IF 4.3 3区 工程技术
International Journal of Energy Research Pub Date : 2025-02-12 DOI: 10.1155/er/5398834
Khaya Pearlman Shabangu, Nhlanhla Mthembu, Manimagalay Chetty, Babatunde Femi Bakare
{"title":"The Computational Modeling of Grid-Connected Double-Chamber Microbial Fuel Cell (DCMFC) Bioenergy Utilizing MATLAB Simulink Software","authors":"Khaya Pearlman Shabangu,&nbsp;Nhlanhla Mthembu,&nbsp;Manimagalay Chetty,&nbsp;Babatunde Femi Bakare","doi":"10.1155/er/5398834","DOIUrl":"https://doi.org/10.1155/er/5398834","url":null,"abstract":"<div>\u0000 <p>Owing to the depletion of fossil fuels, rising energy costs, and environmental pollution, there has been a growing focus on exploring and exploiting renewable energy sources. This study aims to demonstrate the modeling of a grid-connected double-chamber microbial fuel cell (DCMFC) biomass energy system via MATLAB Simulink software. The experimental measurements obtained from DCMFC outputs served as the basis for developing the inverter-grid connection model and simulation output in MATLAB Simulink software. Briefly, the DCMFC DC boost voltage was connected to the positive and negative buses of the three-phase DC‒AC inverter circuit, with switching patterns controlled by gate pulses in each transistor. Full square wave single-stage PWM pulses are generated by the gate for control. The power generated by the inverter was measured via a three-phase VI block for analysis, with voltages and currents displayed via a scope. To address potential noise during switching, an LC filter is employed to suppress noise output and stabilize power generation. Another power meter measures power from the grid, with waveforms displayed via scope blocks. Before synchronization between power from the DCMFC and the grid occurs, four requirements must be met: the grid voltage must match the inverter output voltage, the inverter frequency must match the grid frequency, the phase sequence must be the same, and the phase angle of the inverter must match that of the grid. Additionally, Institute of Electrical and Electronics Engineers (IEEE)-specific requirements were evaluated during the simulation for this study. In addition, this study critically examined whether the DCMFC inverter model conforms to conventional requirements, International Electrotechnical Commission (IEC) standards, and IEEE standards for the integration of inverters into the grid. Compared with previous studies on inverter modeling for grid connections, past studies have emphasized the efficacy of biomass power plants and different inverter topologies for photovoltaic (PV) systems. The current study focuses on optimizing a multilevel inverter-based model, achieving low total harmonic distortion (THD) below IEEE standards. In this study, the use of a multilevel inverter configuration proved highly effective in reducing the harmonic content, leading to synchronized phase sequences and enhanced coherence between the grid and inverter voltages. With a THD of 4.75% at 50 Hz, supported by a harmonic distortion value of 422.5, the chosen configuration significantly minimized the harmonic distortion. This success underpins the system’s reliability and efficiency, offering promising implications for practical applications.</p>\u0000 </div>","PeriodicalId":14051,"journal":{"name":"International Journal of Energy Research","volume":"2025 1","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/er/5398834","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143396978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Research on Optimization of the Upper Particle Size Limit of Gangue in Slurry Backfill Based on Interference Settlement
IF 4.3 3区 工程技术
International Journal of Energy Research Pub Date : 2025-02-11 DOI: 10.1155/er/2471487
Wenyu Lv, Tianqi Song, Yongping Wu, Wenzhe Gu, Fengqi Qiu, Panshi Xie, Hao Pan, Chao Lyu, Kai Guo, Xinxin Zhou
{"title":"Research on Optimization of the Upper Particle Size Limit of Gangue in Slurry Backfill Based on Interference Settlement","authors":"Wenyu Lv,&nbsp;Tianqi Song,&nbsp;Yongping Wu,&nbsp;Wenzhe Gu,&nbsp;Fengqi Qiu,&nbsp;Panshi Xie,&nbsp;Hao Pan,&nbsp;Chao Lyu,&nbsp;Kai Guo,&nbsp;Xinxin Zhou","doi":"10.1155/er/2471487","DOIUrl":"https://doi.org/10.1155/er/2471487","url":null,"abstract":"<div>\u0000 <p>With the increasing demand for gangue disposal in China, gangue slurry filling technology, as a necessary technical means for harmless disposal of gangue under low interference conditions, has been widely promoted in Western China, Mongolia, and Shaanxi regions. In order to optimize the upper limit particle size of gangue slurry under interference settlement conditions to ensure the safety of pipeline transportation, the article systematically carried out the gangue slurry characteristics and static settlement test, studied the interference settlement conditions of gangue slurry in the suspension of coarse particles characteristics, and analysis of the gangue particles obtained by the settling speed of engineering verification. The results show that gangue slurry has coarser particles, complex components, and high solid content characteristics, and its static settlement characteristics cannot truly restore the flow state in the pipeline. The particle settling velocity is affected by the concentration of slurry, rheological parameters, gangue particle size, and gangue fine particles of the density of the suspension medium through the mechanical derivation method to obtain the gangue particle settling velocity calculation formula. Moreover, take indoor large-scale tests and field applications for double verification, the upper limit of particle size of 3.00 mm under the condition of the maximum sinking speed of 1.092 × 10<sup>−6</sup> m/s can realize the start with the material did not happen to plug the pipe accident, the field test of the neighboring grouting filling effect is good.</p>\u0000 </div>","PeriodicalId":14051,"journal":{"name":"International Journal of Energy Research","volume":"2025 1","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/er/2471487","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143380526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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