IET Smart Grid最新文献

{"title":"An efficient hybrid algorithm based on particle swarm optimisation and teaching-learning-based optimisation for parameter estimation of photovoltaic models","authors":"Dianlang Wang,&nbsp;Zhongrui Qiu,&nbsp;Qi Yin,&nbsp;Haifeng Wang,&nbsp;Jing Chen,&nbsp;Chengbi Zeng","doi":"10.1049/stg2.12198","DOIUrl":"https://doi.org/10.1049/stg2.12198","url":null,"abstract":"<p>In recent years, many meta-heuristic algorithms have been investigated to estimate the parameters of photovoltaic (PV) models. However, the accuracy of the estimated parameters still needs to be concerned, especially for some complex PV models with many unknown parameters. In order to estimate the unknown parameters of the PV models more precisely and reliably, an efficient hybrid algorithm based on particle swarm optimisation and teaching-learning-based optimisation (PSOTLBO) is proposed in this paper. In PSOTLBO, inspired by the learner phase of teaching-learning-based optimisation (TLBO), an improved learner phase is designed and introduced into the basic PSO to enhance the global search ability and the ability to get rid of local optimum. The improved learner phase divides the population into four groups according to three values, which are the average fitness values of the overall population, the population in the first half of the fitness ranking and the population in the second half of the fitness ranking. Typically, each group has its particular movement pattern concentrating on exploration or exploitation respectively to improve the search efficiency of the algorithm. Furthermore, to deal with individuals beyond the boundary, a new designed probabilistic rebound strategy is introduced, which increases the diversity of population and avoids population aggregation at the search boundary. Then, the proposed PSOTLBO is applied to estimate the parameters of the single diode model, double diode model and PV module model. The comparative results between PSOTLBO and other 14 advanced algorithms show that the average root mean square error values of different PV models obtained by PSOTLBO are 9.86021878E−04, 9.82630511E−04, 2.42507487E−03, 1.72981371E−03, and 1.66006031E−02, respectively, which indicate that PSOTLBO can provide more accurate and stable parameter estimation results than other compared algorithms. Furthermore, the convergence experimental results demonstrate that PSOTLBO has outstanding performance in convergence speed and stability.</p>","PeriodicalId":36490,"journal":{"name":"IET Smart Grid","volume":"7 6","pages":"1000-1018"},"PeriodicalIF":2.4,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/stg2.12198","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143253134","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":"Review of the opportunities and challenges to accelerate mass-scale application of smart grids with large-language models","authors":"Heng Shi,&nbsp;Lurui Fang,&nbsp;Xiaoyang Chen,&nbsp;Chenghong Gu,&nbsp;Kang Ma,&nbsp;Xinsong Zhang,&nbsp;Zhong Zhang,&nbsp;Juping Gu,&nbsp;Eng Gee Lim","doi":"10.1049/stg2.12191","DOIUrl":"https://doi.org/10.1049/stg2.12191","url":null,"abstract":"<p>Smart grids represent a paradigm shift in the electricity industry, moving from traditional one-way systems to more dynamic, interconnected networks. These grids are characterised by their intelligent automation, robust structure, and enhanced interaction with customers, backed by comprehensive monitoring and data analytics. The key of this transformation is the integration of data-driven methods into smart grids. Compared to previous big data solutions, large language models (LLMs), with their advanced generalisation abilities and multi-modal competencies, are crucial in effectively managing and integrating diverse data sources. They address challenges such as data inconsistency, inadequate quality, and heterogeneity, thereby enhancing the operational efficiency and reliability of smart grids. Furthermore, at the system level, LLMs improve human–system interactions, making smart grids more user-friendly and intuitive. Last but not the least, the structure of LLMs performs inherent advantages in bolstering system security and privacy, alongside in resolving issues related to system compatibility and integration. The paper reviews the data-empowered smart grids and for the first time finds and proposes opportunities and future directions for adopting LLMs to accelerate the mass-scale application of Smart Grids.</p>","PeriodicalId":36490,"journal":{"name":"IET Smart Grid","volume":"7 6","pages":"737-759"},"PeriodicalIF":2.4,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/stg2.12191","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143248707","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":"Sustainable hybrid renewable energy management system for a community in island: A model approach utilising Hybrid Optimization of Multiple Energy Resources optimization and priority setting-based Supervisory Control and Data Acquisition operation","authors":"Iftekhar Ahmed,&nbsp;Md. Abdur Razzak,&nbsp;Feroz Ahmed","doi":"10.1049/stg2.12192","DOIUrl":"https://doi.org/10.1049/stg2.12192","url":null,"abstract":"<p>This paper explores sustainable energy management strategies for a remote community on the Island of Bhashanchar in the Bay of Bengal, designated by the Government of Bangladesh to host Rohingya refugee camps. The island lacks utility-scale power infrastructure, relying primarily on rooftop solar systems. Addressing the challenge of efficient energy utilization, the study analyses the Bhashanchar Community System's energy dynamics, load demand, and renewable energy integration feasibility. The primary objective is to design an optimised hybrid microgrid system to balance energy supply and demand, reducing blackout risks. A Supervisory Control and Data Acquisition based load management system is introduced for real-time energy distribution, enhancing reliability. The proposed off-grid hybrid microgrid system includes solar PV, wind, diesel, biomass, wind turbine, tidal turbine, and battery storage. It incorporates priority setting mechanisms to categorise energy sources by reliability, availability, and environmental impact, ensuring consistent, reliable, and sustainable energy supply. The study demonstrates that the proposed system can achieve significant energy savings, around 23%, compared to traditional models, showcasing the effectiveness of the hybrid microgrid approach in powering remote communities with limited conventional energy access.</p>","PeriodicalId":36490,"journal":{"name":"IET Smart Grid","volume":"7 6","pages":"940-966"},"PeriodicalIF":2.4,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/stg2.12192","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143253857","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":"Fault location method for new distribution networks based on waveform matching of time–frequency travelling waves","authors":"Zhongqiang Zhou,&nbsp;Yuan Wen,&nbsp;Moujun Deng,&nbsp;Jianwei Ma,&nbsp;Jupeng Zeng,&nbsp;Xiaolong She","doi":"10.1049/stg2.12190","DOIUrl":"https://doi.org/10.1049/stg2.12190","url":null,"abstract":"<p>Some existing fault location methods for distribution networks rely too much on the local wave head information of the time or frequency domain signals, making it difficult to adapt to the increasingly complex structure and operating conditions of the distribution network after the new energy access. For improvement, the travelling wave (TW) time and frequency ranges that can effectively avoid waveform distortion caused by new energy access are analysed. The one-to-one matching relationship between the TW waveforms in these ranges and the fault positions is revealed. A fault TW time–frequency matrix with specific time and frequency windows is constructed, and a new distribution network fault location method is proposed based on the matching technique of waveform features, which realises the accurate fault location by exploring the proportionality between the cumulative trend of the matrix energy amplitude deviation and the fault point position. Simulation test results show that the proposed method is not affected by the complex structure of distribution networks such as new energy access and overhead-cable line mixing on fault location and flexibly transforms the fault location problem into a time–frequency TW waveform matching problem, which improves the accuracy and robustness of the fault location for new distribution networks to a degree.</p>","PeriodicalId":36490,"journal":{"name":"IET Smart Grid","volume":"7 6","pages":"929-939"},"PeriodicalIF":2.4,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/stg2.12190","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143248081","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":"Integration of solar technology into the electric railway system in dense urban regions","authors":"Ahmed Mohamed,&nbsp;Rohama Ahmad,&nbsp;Bonny Xavier","doi":"10.1049/stg2.12188","DOIUrl":"https://doi.org/10.1049/stg2.12188","url":null,"abstract":"<p>This paper investigates the deployment of solar technology throughout an electric railway system to accommodate tractive power needs. The approach is evaluated from both a technical and financial standpoint to better understand its overall feasibility. A case study is presented using New York City's subway system as the centre of deployment. As a means to both prevent excess voltages, as well as contribute to the city's shift to zero emission, parallel electric bus charging is also studied. It has been demonstrated that the proposed integration allows the subway system to still function without any hindrance to rail operation. The system is able to provide charging power for three to six electric buses per passenger station. In addition, the approach shows long-term financial growth with average annual electric bill savings of approximately $50,000 per passenger station, each with a relatively short payback period of approximately 4 years.</p>","PeriodicalId":36490,"journal":{"name":"IET Smart Grid","volume":"7 6","pages":"904-916"},"PeriodicalIF":2.4,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/stg2.12188","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143252808","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":"Probabilistic coupled EV-PV hosting capacity analysis in LV networks with spatio-temporal modelling and copula theory","authors":"Chathuranga D. W. Wanninayaka Mudiyanselage,&nbsp;Kazi N. Hasan,&nbsp;Arash Vahidnia,&nbsp;Mir Toufikur Rahman","doi":"10.1049/stg2.12189","DOIUrl":"https://doi.org/10.1049/stg2.12189","url":null,"abstract":"<p>The authors present an innovative approach for probabilistic coupled electric vehicle (EV) and solar photovoltaics (PV) hosting capacity analysis in low-voltage (LV) distribution networks. The challenges posed by system uncertainties and correlations between different parameters, such as PV generation and EV charging demand, are addressed using probabilistic modelling. To appropriately incorporate the geographical distribution and time-variant patterns of EV charging demand, a comprehensive spatio-temporal (ST) model is developed to capture the trip distance, EV arrival, and charging time. The correlation between the PV generation and EV charging demand is effectively captured by copula theory. The proposed models have been validated using actual EV charging and PV generation data from 36 Australian EV users over 1 year. Power flow simulation with actual data and modelled data have identified EV-only and coupled EV-PV hosting capacities in an Australian LV test network. The coupled EV-PV model presents a higher level of accuracy, having an average mean absolute percentage error (MAPE) of 5.97% compared to independent EV profiles having a MAPE of 10.12%. A voltage profile analysis with the EV and PV profiles also validates the same trend, having MAPE of 1.5% and 1.95%, respectively, for coupled EV-PV and independent EV profiles.</p>","PeriodicalId":36490,"journal":{"name":"IET Smart Grid","volume":"7 6","pages":"917-928"},"PeriodicalIF":2.4,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/stg2.12189","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143252334","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":"Enhancing microgrid performance: Optimal proactive reactive power dispatch using photovoltaic active power forecasts","authors":"Alexander Casilimas-Peña,&nbsp;Karol Rosen,&nbsp;César Angeles-Camacho","doi":"10.1049/stg2.12186","DOIUrl":"https://doi.org/10.1049/stg2.12186","url":null,"abstract":"<p>Microgrids with substantial incorporation of distributed renewable energy sources face challenges such as magnitude voltage rise, frequency variations, and power quality issues. A novel method is proposed to managing and controlling reactive power within microgrids with high integration of photovoltaic panels. The proactive dispatch is carried out for a few minutes in advance, using power forecast and the inverters of the photovoltaic installations as reactive energy providers. The goal is to stabilise voltage levels and reduce overall energy losses. Optimising reactive power poses a non-convex problem. The presented method tackles this challenge by employing Conic approximations and Wirtinger calculus techniques to convert and frame the issue within a convex framework, simplifying its resolution. It primarily concentrates on fine-tuning reactive power output from photovoltaic inverters to minimise overall losses and maintain stable magnitude voltage levels. To enable the reactive power dispatch, a Markov switching forecasting model that uses on-site data, including sky imagery and other external variables, predicting active power generation every 6 minutes. The proposed technique is evaluated in a CIGRE test network, showing an average loss reduction between 14% and 66% for sunny and cloudy conditions with different levels of PV penetration, this while maintaining the steady state voltages in range.</p>","PeriodicalId":36490,"journal":{"name":"IET Smart Grid","volume":"7 6","pages":"891-903"},"PeriodicalIF":2.4,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/stg2.12186","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143253266","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":"Dynamic optimisation of virtual synchronous generator to enhance stability of power system","authors":"Kenta Koiwa,&nbsp;Akira Tomabechi,&nbsp;Tadanao Zanma,&nbsp;Kang-Zhi Liu","doi":"10.1049/stg2.12183","DOIUrl":"https://doi.org/10.1049/stg2.12183","url":null,"abstract":"<p>Virtual synchronous generators (VSGs) are essential for the high penetration of renewable energy sources. VSGs have virtual rotating inertia, a damping effect, and synchronising power such as actual SGs. Such features of VSGs offer a promising structure to improve the stability of power systems. VSGs are required to suppress power and system frequency oscillations. In addition, VSGs must operate within a current limit since they are vulnerable to the overcurrent, unlike actual SGs. The authors propose a novel dynamic and optimal VSG to enhance the frequency stability in power systems while guaranteeing the current limit. The proposed approach determines an optimal tuple of inertia and damping of VSG online and guarantees the current limit with the use of a circuit model. The effectiveness of the proposed method is demonstrated via experiments, comparing it with the conventional methods.</p>","PeriodicalId":36490,"journal":{"name":"IET Smart Grid","volume":"7 6","pages":"858-871"},"PeriodicalIF":2.4,"publicationDate":"2024-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/stg2.12183","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143252559","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":"Charting the UK's path to net zero emissions by 2050: Challenges, strategies, and future directions","authors":"Sulman Shahzad,&nbsp;Muhammad Faheem,&nbsp;Hafiz Abdul Muqeet,&nbsp;Muhammad Waseem","doi":"10.1049/stg2.12185","DOIUrl":"https://doi.org/10.1049/stg2.12185","url":null,"abstract":"<p>The authors explore the various obstacles and possible approaches that the UK may take to fulfil its goal of having net-zero greenhouse gas emissions by 2050. The paper thoroughly examines several aspects of this project, such as the modernisation of infrastructure, the energy transition, the economic effects, the obstacles to research and development, changes in behaviour, and the frameworks for policy and regulation. With a 44% decrease from 1990 levels by 2021, it showcases the UK's noteworthy achievement in lowering emissions and its ambitious initiatives, such as the £12 billion Ten Point Plan, to accelerate this development. The difficulties of switching from reliance on fossil fuels to renewable energy sources, their implications for the economy, and the necessity of green technology innovation are all covered in the article. It also discusses the behavioural sides of this shift, highlighting the need to change one's lifestyle and engage the public. To address these issues, the importance of international cooperation and policymaking is emphasised. Insights into potential remedies are provided by the article, which includes energy efficiency initiatives, investments in renewable energy, assistance for clean technology R&amp;D, green funding options, public awareness campaigns, international cooperation, and regulatory frameworks. Every one of these alternatives is examined for possible effects and obstacles. The article concludes that reaching net zero in the UK is a complex but necessary objective that calls for a concerted strategy that strikes a balance between social and economic concerns and environmental sustainability.</p>","PeriodicalId":36490,"journal":{"name":"IET Smart Grid","volume":"7 6","pages":"716-736"},"PeriodicalIF":2.4,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/stg2.12185","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143249194","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":"Demand response potential evaluation based on feature fusion with expert knowledge and multi-image","authors":"Jiale Liu,&nbsp;Xinlei Cai,&nbsp;Zijie Meng,&nbsp;Xin Jin,&nbsp;Zhangying Cheng,&nbsp;Tingzhe Pan","doi":"10.1049/stg2.12182","DOIUrl":"https://doi.org/10.1049/stg2.12182","url":null,"abstract":"<p>Potential evaluation to assist demand response decisions has garnered significant attention with the development of new power systems. However, existing data-driven methods are challenging to properly exploit multivariate features and the process of response potential evaluation is unclear. Therefore, the authors propose an evaluation method that fuses expert features with multi-image inputs and analyses the model evaluation process based on gradient. First, typical load profiles are extracted by the proposed procedure. Next, features derived from expert knowledge are calculated from the perspectives of adjustability, regularity, and sensitivity of electricity usage. Additionally, the typical load profile's recurrence plot, Markov leapfrog field, and Gramian angle field are created and incorporated into the colourful image as inputs. Then, the evaluation results are obtained by a two-stream neural network fusing multivariate features. In the experiments, the proposed method is validated and discussed by comparing with many existing methods using London household users' data under the time-of-use price, providing new insights for demand response potential evaluation.</p>","PeriodicalId":36490,"journal":{"name":"IET Smart Grid","volume":"7 6","pages":"843-857"},"PeriodicalIF":2.4,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/stg2.12182","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143248149","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}