Renewable Energy Focus最新文献

{"title":"Optimal management of shared energy storage in remote microgrid: A user-satisfaction approach","authors":"Rishal Asri ,&nbsp;Hirohisa Aki ,&nbsp;Daisuke Kodaira","doi":"10.1016/j.ref.2024.100635","DOIUrl":"10.1016/j.ref.2024.100635","url":null,"abstract":"<div><p>This study investigates the utilization of renewable energy technologies, such as solar photovoltaics (PV) and energy storage, to reduce reliance on fossil-fuel microgrid generators in remote areas. However, renewable energy alone is not enough to address the existing challenges. Therefore, to optimize microgrid performance, it is crucial to incorporate shared energy storage and demand-response (DR) strategies from the demand side. Additionally, prosumers engaging in DR often encounter user-satisfaction issues. In this study, we propose a shared energy storage model that considers user satisfaction in remote areas. Additionally, we compared three energy storage models: individual, neighbor, and communal, to assess their effectiveness. To validate our findings, we juxtaposed two pricing scenarios: fixed and time-of-use (TOU) rates. The results of our study indicate that using shared energy storage leads to operational cost savings and increases user satisfaction compared to other scenarios. Finally, we employed the social index rate and performed a sensitivity analysis to determine the optimal operation that balances economic and environmental considerations.</p></div>","PeriodicalId":29780,"journal":{"name":"Renewable Energy Focus","volume":"51 ","pages":"Article 100635"},"PeriodicalIF":4.2,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142243752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A review of IoT-enabled smart energy hub systems: Rising, applications, challenges, and future prospects","authors":"Magda I. El-Afifi ,&nbsp;Bishoy E. Sedhom ,&nbsp;Sanjeevikumar Padmanaban ,&nbsp;Abdelfattah A. Eladl","doi":"10.1016/j.ref.2024.100634","DOIUrl":"10.1016/j.ref.2024.100634","url":null,"abstract":"<div><p>The 21^st century’s booming population and escalating energy demands have driven significant efforts to enhance the Energy Hub (EH). The goal is to create a more intelligent and responsive system that can effectively cater to consumer needs while simultaneously improving the reliability and efficiency of contemporary energy infrastructure. The Internet of Things (IoT) has emerged as a key enabling technology for Smart Energy Hubs (SEH). While IoT offers a plethora of innovative solutions across various sectors, including critical infrastructure, it also introduces new security challenges. Since IoT devices inherently connect to the internet, SEH systems become susceptible to a wider range of cyberattacks. This vulnerability heightens as the number of integrated IoT devices increases. A single compromised device can expose the entire hub to cyber threats. Such attacks on energy sources have the potential to cripple entire cities, resulting in significant economic devastation. Therefore, robust security measures must be implemented before the widespread adoption of IoT-based devices in energy systems. This research delves into the architecture and infrastructure of IoT-enabled SEH. Following this, the focus shifts to analyzing the primary challenges and security concerns associated with their deployment. Finally, the research emphasizes cutting-edge approaches and tools that can bolster the security and resilience of IoT-enabled SEH against contemporary physical and cyber threats. Implementing secure and advanced data transmission systems based on blockchain technology holds promise in safeguarding the entire EH from cyber-physical attacks in the future.</p></div>","PeriodicalId":29780,"journal":{"name":"Renewable Energy Focus","volume":"51 ","pages":"Article 100634"},"PeriodicalIF":4.2,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S175500842400098X/pdfft?md5=bb93c9ee62572cd8ecfa37f73c12e987&pid=1-s2.0-S175500842400098X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142229090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enabling sustainable energy sharing and tracking for rural energy communities in emerging economies","authors":"Bokolo Anthony Jnr","doi":"10.1016/j.ref.2024.100633","DOIUrl":"10.1016/j.ref.2024.100633","url":null,"abstract":"<div><p>Presently Rural Energy Communities (REC) are faced with challenges such as the inefficient distribution of energy from Renewable Energy Sources (RES), unfair pricing, and the inclusion of prosumers into the electricity market. Therefore, this article proposed an approach that employed enabling technologies such as Distributed Ledger Technologies (DLT), self-enforcing smart contracts-enabled Internet of Things (IoT), and Artificial Intelligence (AI) for sustainable energy sharing and tracking in REC. Additionally, a model is proposed based on key factors that influence the adoption of enabling technologies in REC. For the methodology qualitative data is collected from secondary sources and descriptive analysis is employed to present the key findings. Key findings from this study contributes to develop a decarbonized, decentralized, and digitized energy management approach to support the sustainability of REC. The deployment of AI can facilitate prediction short-term energy planning for RES production and consumption based on real-time data from IoT devices. More importantly, findings from this study presents use case scenarios of energy sharing and tracking, and green electric vehicle charging in REC suggesting that DLT based smart contracts, IoT, and AI offers an effective approach to accelerate the sharing and tracking of RES in REC. Besides, DLT and smart contracts enables real-time electricity consumption monitoring, energy trading management, and pricing.</p></div>","PeriodicalId":29780,"journal":{"name":"Renewable Energy Focus","volume":"51 ","pages":"Article 100633"},"PeriodicalIF":4.2,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1755008424000978/pdfft?md5=30c7903daf10bf6fe50939b2b695f25c&pid=1-s2.0-S1755008424000978-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142172668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Coupled partition and configuration for cohesive and self-sufficient virtual microgrids","authors":"Lechuan Piao ,&nbsp;Fei Xue ,&nbsp;Shaofeng Lu ,&nbsp;Lin Jiang ,&nbsp;Xiaoliang Wang ,&nbsp;Qigang Wu","doi":"10.1016/j.ref.2024.100632","DOIUrl":"10.1016/j.ref.2024.100632","url":null,"abstract":"<div><p>Active Distribution Network shows promise in operating and controlling distributed generations. Based on ADN structural and electrical differences, ADN could be partitioned to reveal innate heterogeneity for better control. Virtual Microgrid works as such a partition mode that each VM serves both as a part of ADN and as an individual operating agent. To identify VM boundaries, previous research utilized community detection methods and then configured ADN based on stationary partition. In this paper, VM partition and configuration are simultaneously determined in the proposed Coupled-Configuration-Partition of Active Planning. Also, a new definition of electrical edge betweenness is proposed to depict interaction among power system buses to improve the partition algorithm. Based on this proposal, ADN is planned to be cohesive in Net-ability, Flexibility Supply Index, and Capacity Fitness, in the meantime to minimize the cost in a multi-objective optimization, iteratively in Genetic Algorithm to reach Pareto Front. Case studies are designed to denote the benefits of the proposed Coupled-Configuration-Partition of Active Planning in modularity and system cohesion intensity.</p></div>","PeriodicalId":29780,"journal":{"name":"Renewable Energy Focus","volume":"51 ","pages":"Article 100632"},"PeriodicalIF":4.2,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142167989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Efficient islanding detection in hybrid Microgrids: The hybrid approach integrating ROCPAD and IB-RPV","authors":"Mangesh S. Kulkarni ,&nbsp;Sachin Mishra ,&nbsp;Sureshkumar Sudabattula ,&nbsp;Naveen Kumar Sharma ,&nbsp;Vinay Kumar Jadoun","doi":"10.1016/j.ref.2024.100629","DOIUrl":"10.1016/j.ref.2024.100629","url":null,"abstract":"<div><p>In light of the growing integration of renewable energy sources (RES) into power networks, this study presents a new hybrid islanding detection method (IDM) designed to improve the islanding detection efficiency of hybrid MGs. The proposed hybrid IDM combines the strengths of two existing islanding detection approaches: The Rate of Change of Phase Angle Difference (ROCPAD) and the Intermittent-Bilateral Reactive Power Variation (IB-RPV). By combining these two techniques, the hybrid strategy uses their complementary qualities, minimizing the drawbacks of each method and improving detection accuracy overall. With analyzed performance, the suggested hybrid IDM’s compatibility with IEEE 1547 standards shows it complies with industry standards. Comparative performance analysis of the proposed IDM with existing IDM shows improved islanding detection accuracy, fast detection of islanding events, and no nuisance tripping. The method is noteworthy for its zero non-detection zone (NDZ) and negligible impact on power quality. The proposed hybrid IDM suits Hybrid Microgrids (HMG) with inverter-based Distributed Generation (DG).</p></div>","PeriodicalId":29780,"journal":{"name":"Renewable Energy Focus","volume":"51 ","pages":"Article 100629"},"PeriodicalIF":4.2,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1755008424000930/pdfft?md5=6d3dc4dbfce7a302c88078e2051e585d&pid=1-s2.0-S1755008424000930-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142162699","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental investigation and performance evaluation of an asymmetrical Eleven-Level Multilevel Inverter (ELMLI) with reduced switching count and voltage stress","authors":"Shahbaz Ahmad ,&nbsp;Mohd Tariq ,&nbsp;Vimlesh Verma","doi":"10.1016/j.ref.2024.100598","DOIUrl":"10.1016/j.ref.2024.100598","url":null,"abstract":"<div><p>In this study an eleven-level multilevel inverter (ELMLI) with reduced switching requirements and lower voltage stress is introduced. The architecture comprises of eight semiconductor devices and only one capacitor, yielding a voltage boosting output of 1.67. Gate pulses for the inverter circuit are provided through a straight forward nearest level control (NLC) method. To highlight the superiority of this topology, a assessment is conducted with recent designs concerning the numbers of semiconductor devices, diodes, sources, and capacitors employed. The Total Harmonic Distortion (THD) is measured at 7.61%, which nearly meets acceptable limits. Subsequently, the suggested circuit is simulated operationally and functionally using software tools such as PLECS and MATLAB (SIMULINK). Experimental validation is also carried out under various loading conditions using the setup.</p></div>","PeriodicalId":29780,"journal":{"name":"Renewable Energy Focus","volume":"51 ","pages":"Article 100598"},"PeriodicalIF":4.2,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142243751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Battery energy storage with renewable energy sources integration in unbalanced distribution network considering time of use pricing","authors":"Sigma Ray ,&nbsp;Kumari Kasturi ,&nbsp;Samarjit Patnaik ,&nbsp;Manas Ranjan Nayak","doi":"10.1016/j.ref.2024.100630","DOIUrl":"10.1016/j.ref.2024.100630","url":null,"abstract":"<div><p>The increasing demand for sustainable energy solutions and the escalating energy demand have facilitated the emergence of renewable energy sources (RES), such as photovoltaic (PV) sources. Combining RES with battery energy storage system (BESS) technology reduces peak hour demand and allows for economical charging and discharging for time-based energy pricing. Integrating PV and BESS in an unbalanced system with multiple RES sources is a challenging task. It requires a robust algorithm to minimise power loss in the distribution system and decrease the voltage unbalance factor (VUF). This paper presents a new multi-objective Pelican optimisation algorithm (MOPOA) for the optimal allocation of PV and BESS. The MOPOA helps find the best placement of PV and BESS in an IEEE-33 bus unbalanced radial distribution system (URDS). The proposed algorithm combines multiple benefits from a lower net present cost (NPC) and a higher voltage profile enhancement index (VPEI). The case studies and simulation results show that the proposed method places PV and BESS in IEEE 33-bus URDS optimally, satisfying all of the system’s requirements. The results indicate an improvement in the minimum VUF factor of 4.4% in a winter day and 4.3% in a summer day; a reduction in active power loss of 16% in a winter day and 7.1% in a summer day; and a reduction in reactive power loss of 7.5% in a winter day and 7.2% in a summer day. Thus, the recommended strategy effortlessly accelerates to a suboptimal solution.</p></div>","PeriodicalId":29780,"journal":{"name":"Renewable Energy Focus","volume":"51 ","pages":"Article 100630"},"PeriodicalIF":4.2,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142150293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Identifying interaction boundary of inverter-based generation in assessing system strength of power grids using relative electrical distance concept","authors":"Shereefdeen Oladapo Sanni ,&nbsp;Olatunji Obalowu Mohammed ,&nbsp;Ayodele Isqeel Abdullateef ,&nbsp;Daw Saleh Sasi Mohammed ,&nbsp;Joseph Yakubu Oricha","doi":"10.1016/j.ref.2024.100627","DOIUrl":"10.1016/j.ref.2024.100627","url":null,"abstract":"<div><p>The increasing use of inverter-based generation (IBG) in power grids raises concern about system strength. This is partly due to the inherent interactions among multiple IBGs in close proximity to one another. This paper proposes an approach to identifying the existential boundary of interaction in a network using the relative electrical distance (RED) concept. The mathematical formulation of the RED concept to address the interaction problem among the IBGs involved utilising the power system network’s admittance matrix to capture its structural characteristics. An interaction matrix derived from the RED values of all IBG pairs was then developed to identify the interacting IBG groups. The proposed approach was demonstrated using the IEEE 39-bus system and a practical 72-bus Nigerian power grid. Results showed that RED values effectively group interacting IBGs, with values closer to 0 signifying higher interaction levels, values closer to 1 indicating lower interaction, and a value of 1 denoting no interaction. Time-domain simulations confirmed the accuracy of the approach, demonstrating that the effect of control interaction propagates proportionally to neighbouring IBGs based on RED values. However, fault currents can influence the impact of control interactions. This approach, which requires less computational effort, provides a quick identification tool for potential areas of concern based on the degree of interaction, enhancing the reliability of power grids with high IBG penetration.</p></div>","PeriodicalId":29780,"journal":{"name":"Renewable Energy Focus","volume":"51 ","pages":"Article 100627"},"PeriodicalIF":4.2,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142150294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A critical review on intelligent-based techniques for detection and mitigation of cyberthreats and cascaded failures in cyber-physical power systems","authors":"Oluwaseun O. Tooki,&nbsp;Olawale M. Popoola","doi":"10.1016/j.ref.2024.100628","DOIUrl":"10.1016/j.ref.2024.100628","url":null,"abstract":"<div><p>The advent of advanced technologies in power and energy systems is fortifying the grid’s resilience and enhancing the availability of power supply through a network of electrical and communication apparatus. The notable technologies include cyber-physical power systems (CPPS) and transactive energy systems (TES). The CPPS, a derivative of cyber-physical system (CPS), is for operational enhancement, and to boost performance. TES is an energy solution that uses economic and control techniques that enhance the dynamic balance between the supplied energy and energy demand across the electrical infrastructure. Integration of intelligence systems and information and communication technologies has brought new objections and threats to CPPS and TES, where adversaries capitalize on the vulnerabilities in cyber systems to manipulate the system deceitfully. Furthermore, the susceptibility of CPPS to information attacks inherently has the potential to cause cascading failures. Researchers have extensively focused their searchlight on applications of advanced technologies within CPPS. However, leaving out the impact of cascaded failures on the CPPS’ efficiency. This work critically assesses intelligent-based techniques used for cyber threat detection and mitigation. It offers insights on how to guide against some of the approaches adopted by cyber-attackers, identifies corresponding gaps, and presents future research directions. Also presented is the conceptualization of applying CPS models for the cyber-security enhancement of TES solutions. The articles selected for this review were evaluated based on recency and the application of intelligent approaches for intrusion and cyberattack detection in CPPS. It was uncovered from the review that topological models are often used to describe cyberattack processes in CPPS. Also, researchers based their investigation on False-Data Injection Attacks and IEEE-118 Bus systems for validation. It was discovered that the deep Reinforcement Learning-based Graph Convolutional Network is a promising solution for intrusion and cyberattack detection in TES owing to its security, detection accuracy, reliability, and scalability.</p></div>","PeriodicalId":29780,"journal":{"name":"Renewable Energy Focus","volume":"51 ","pages":"Article 100628"},"PeriodicalIF":4.2,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1755008424000929/pdfft?md5=31328d96582a1a07c95bc49a1c3937f0&pid=1-s2.0-S1755008424000929-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142150289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A review of dynamic changes in complementarities and transition pathways toward distributed energy resource–based electrical system","authors":"Yi-Yang Wang,&nbsp;Akihisa Mori","doi":"10.1016/j.ref.2024.100626","DOIUrl":"10.1016/j.ref.2024.100626","url":null,"abstract":"<div><p>The global increase in renewable energy share and grid-resilience risks posed by climate change make distributed energy resources (DERs) a key priority for sustainable energy. While previous studies have explored the required changes for achieving a renewable energy source (RES)-based system, they have paid little attention to different transition strategies based on grid paradigms and their adaptability to local contexts. This study fills this research gap by showing transition pathways toward DER- and RES-based systems through a literature review of DERs, focusing on complementarity elements in electricity systems. We found that the transition pathway must be associated with changes in the following three complementarity elements: (1) the expansion and empowerment of prosumers; (2) the design and arrangement of the energy market and its mechanism in favor of the DER-based system; and (3) the adjustment of tasks and functions of existing stakeholders. These findings make a novel contribution to arguments about incumbents’ sustainability transitions, particularly incumbents’ adoption of new business models and adaptation to new institutions.</p></div>","PeriodicalId":29780,"journal":{"name":"Renewable Energy Focus","volume":"51 ","pages":"Article 100626"},"PeriodicalIF":4.2,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1755008424000905/pdfft?md5=75a9ebd181b22c6e27681d73e30f8206&pid=1-s2.0-S1755008424000905-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142150290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}