International Journal of Electrical Power & Energy Systems最新文献

{"title":"Optimal dispatch of industrial loads considering process constraints for renewable energy consumption","authors":"Zijie Ren ,&nbsp;Bowen Zhou ,&nbsp;Liaoyi Ning ,&nbsp;Wei Zheng ,&nbsp;Hengyu Liu ,&nbsp;Dawei Hu ,&nbsp;Jiazheng Sun","doi":"10.1016/j.ijepes.2025.110550","DOIUrl":"10.1016/j.ijepes.2025.110550","url":null,"abstract":"<div><div>To address the limited participation of industrial enterprises in using renewable energy (RE) and the problem of poor returns, an optimal dispatching strategy is proposed for introducing industrial loads from wind and photovoltaic energy production. First, we establish the production process constraint structure in the magnesium industry and analyze the spatial distribution of arc power from a process point perspective. Then, to calculate the cost of wind and photovoltaic energy consumption at each stage and derive a strategy for industrial loads, we apply the “industrial load + energy storage” method. Finally, we present optimization objectives to minimize operational costs and maximize consumption. We conducted simulations that considered both the cost of regulation and consumption to optimize industrial load modifications and integrate the systems. An optimization method is proposed, which fairly allocates each dispatchable resource in each time interval. The results show that the methodology proposed in this paper effectively improves general consumption without additional investment, and affords better engineering value in the actual project.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"166 ","pages":"Article 110550"},"PeriodicalIF":5.0,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Blockchain-based optimization of operation and trading among multiple microgrids considering market fairness","authors":"Hao Liu ,&nbsp;Tianguang Lu ,&nbsp;Yueping Yang ,&nbsp;Yu Guo ,&nbsp;Qinzheng Wu ,&nbsp;Xiaotong Xu ,&nbsp;Haibing Zeng","doi":"10.1016/j.ijepes.2025.110523","DOIUrl":"10.1016/j.ijepes.2025.110523","url":null,"abstract":"<div><div>The microgrid (MG) provides a viable pathway for integrating distributed energy resources (DERs). With the development of the electricity market, the current challenge lies in guiding DERs to enter the market correctly and establishing a fair and equitable market order. In this paper, a virtual power plant (VPP) model is established by aggregating multi-microgrids (MMGs) with an architecture that combines centralized management of the VPP and blockchain-based decentralized transactions between MGs. Market transactions increase the complexity of energy interactions between MGs in the VPP and generate a significant amount of associated data, thereby imposing higher demands on the fairness of transactions and data privacy. In this regard, a blockchain-based optimization method for the operation and trading among MMGs is developed. We design a priority-based bilateral auction model and introduce a malicious bid penalty mechanism to ensure the orderliness of energy interactions between different MGs. To ensure the privacy of transaction prices, a cryptographic algorithm based on Pedersen commitment is proposed, allowing the upper VPP to supervise the legality of electricity settlements under private prices. In the case study, the proposed model is solved by the Equilibrium Optimizer and CPLEX solver. The results show that the proposed method performs well in reducing costs, restraining malicious bids, and protecting price privacy, which is conducive to the healthy development of the electricity market.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"166 ","pages":"Article 110523"},"PeriodicalIF":5.0,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Adaptive time granularity-based coordinated planning method for the electric-hydrogen coupled energy system with hybrid energy storage","authors":"Yixin Liu ,&nbsp;Shulong Huang ,&nbsp;Li Guo ,&nbsp;Ji Li ,&nbsp;Zhongguan Wang ,&nbsp;Jie Song ,&nbsp;Chengshan Wang","doi":"10.1016/j.ijepes.2025.110540","DOIUrl":"10.1016/j.ijepes.2025.110540","url":null,"abstract":"<div><div>The electric-hydrogen coupled system (EHCS) is becoming an important way for renewable energy consumption and energy low-carbon transformation due to its ability of long-term energy transport and short-term power regulation. For the capacity configuration of EHCS, the traditional method with fixed time granularity is difficult to balance the contradiction between model complexity, computational cost and model accuracy. To this end, this paper proposes an adaptive time granularity-based coordinated planning method. Firstly, the seasonal-trend decomposition using losses (STL) algorithm is used to extract the characteristics of intra-day variation and seasonal fluctuation of net loads. On this basis, ward clustering algorithm is applied to realize the vertical typical day selection and horizontal time granulation. The optimal particle number of typical days and seasonal component is determined based on an improved PSO algorithm. Then, a planning model is constructed to determine the capacity of key devices of EHCS, whose results are used in reverse for updating the particle number of PSO algorithm, so that the optimal combination of time granularities can be realized according to the long-term and short-term operational characteristics of different devices. Finally, the effectiveness of the proposed method is verified based on numerous simulation analysis. Compared with the benchmark case based on 8760 h, the average planning error is only 4.52%, while the computation time is reduced by 65.13%, and the average planning error is improved by 10.23% compared with the fixed granularity method.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"166 ","pages":"Article 110540"},"PeriodicalIF":5.0,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stability analysis and admittance reshaping for PQ inverters with different power control methods","authors":"Bao Xie ,&nbsp;Weike Zheng ,&nbsp;Pingyu Li ,&nbsp;Yong Shi ,&nbsp;Jianhui Su","doi":"10.1016/j.ijepes.2025.110541","DOIUrl":"10.1016/j.ijepes.2025.110541","url":null,"abstract":"<div><div>PQ inverters possess the advantage of flexible control of power injection. However, the system stability of PQ inverters is affected by different power control methods. Thus, this paper delves into the system stability of PQ inverters with different power control methods under weak grid. Firstly, there are two kinds of PQ inverters with power control, namely the power control loop (PCL) inverter and the reference current calculation (RCC) inverter. Analysis results show that compared with the PCL method, the inverter using the RCC method can eliminate the control loop, but it will reduce the stability under weak grid. Next, the paper explores the influence of inverter system parameters on the stability margin of PQ inverters, providing detailed guidance for the parameter design of PQ inverters. In addition, in order to improve the system stability of inverters controlled by RCC under weak grid, an admittance shaping strategy is proposed through adding an additional current feedback path. This strategy can increase the amplitude of the inverter output admittance in the mid to high frequency range, thereby significantly improving the stability of the inverter system under weak grid. By adopting this strategy, the stability of grid connected inverters controlled by RCC under weak grid can be comparable to that of those controlled by PCL. Additionally, this strategy is easy to implement and has minimal impact on the transient response of the system. Finally, experimental tests have verified the correctness of the theoretical analysis in the paper.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"166 ","pages":"Article 110541"},"PeriodicalIF":5.0,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143453853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dual-layered deep learning and optimization algorithm for electric vehicles charging infrastructure planning","authors":"Bishoy E. Sedhom ,&nbsp;Abdelfattah A. Eladl ,&nbsp;Pierluigi Siano ,&nbsp;Magda I. El-Afifi","doi":"10.1016/j.ijepes.2025.110545","DOIUrl":"10.1016/j.ijepes.2025.110545","url":null,"abstract":"<div><div>This study aims to develop a robust optimization framework for accurately forecasting electric vehicle (EV) loads and strategically placing EV charging stations (EVCSs) within distribution networks to enhance grid stability and efficiency. EVs offer substantial environmental benefits but pose challenges to power grids due to capacity constraints. To address these issues, a dual-layered deep learning method, combining Autoregressive Integrated Moving Average (ARIMA) and Long Short-Term Memory (LSTM), is employed for precise EV load prediction. Additionally, a Hybrid Archimedes-Genetic (HAG) algorithm, integrating the Archimedes Optimization Algorithm (AOA) and Genetic Algorithm (GA), is proposed to optimize EVCS locations. This multi-objective approach aims to minimize active and reactive power losses while reducing the average voltage deviation index (AVDI). Two case studies were conducted using MATLAB and Python: the first predicted EV power demands, while the second identified optimal EVCS locations in IEEE 33-node and 69-node test systems. Results demonstrate that the HAG method outperforms GA, Particle Swarm Optimization, and AOA individually. For the 33-bus system, active and reactive power losses decreased by 33 % and 33.01 %, respectively, with an AVDI of 0.004. In the 69-bus system, losses were reduced by 19.38 % and 16.76 %, with an AVDI of 0.0014. These findings highlight the HAG method’s effectiveness in optimizing EVCS placement, improving grid performance, and maximizing the benefits of EV adoption.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"166 ","pages":"Article 110545"},"PeriodicalIF":5.0,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143453852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Frequency analysis and calculation of transformer neutral DC caused by metro stray currents","authors":"Aimin Wang ,&nbsp;Sheng Lin ,&nbsp;Qi Zhou ,&nbsp;GuoXing Wu ,&nbsp;Xiaopeng Li ,&nbsp;Jun Liu ,&nbsp;Hongbo Cheng","doi":"10.1016/j.ijepes.2025.110531","DOIUrl":"10.1016/j.ijepes.2025.110531","url":null,"abstract":"<div><div>Metro stray currents flowing into transformers can lead to high-level transformer neutral direct current (TNDC). Since the TNDC is not constant and varies with time randomly, the frequency characteristics of TNDC are confusing and unclear, which will lead to complex transformer electromagnetic characteristics and increase the difficulty of transformer protection and DC bias mitigation. Therefore, it is important to understand the frequency characteristics of TNDC caused by stray currents. To address this issue, this paper performs extensive tests on TNDC. Through the detailed frequency analysis of the test data, the relationship between the main frequencies of neutral DC and metro train time headway is found. To further explain this relationship, a frequency calculation modeling method of TNDC is proposed, in which the traction current along the metro line is innovatively equivalent to impulse and shock frequency signals. Then, comparing the calculation result of the main frequency with the test data, the proposed model is verified. Moreover, the relationship between the main frequency and train time headway is explained and clarified based on the model. Furthermore, the effect of train time headway and dwell time is analyzed. The results show that with the train time headway decreasing and dwell time increasing, the complexity of the neutral DC frequency distribution increases to some extent.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"166 ","pages":"Article 110531"},"PeriodicalIF":5.0,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143445714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analyzing the effect of corona losses on dynamic line rating models for overhead transmission lines","authors":"Jordi-Roger Riba,&nbsp;Manuel Moreno-Eguilaz","doi":"10.1016/j.ijepes.2025.110546","DOIUrl":"10.1016/j.ijepes.2025.110546","url":null,"abstract":"<div><div>High-voltage transmission lines tend to generate corona activity. The value of corona losses is highly dependent on several parameters such as line configuration, conductor geometry, surface condition, operating voltage and weather conditions. International guidelines and standards such as Cigré, IEEE and IEC recommend that corona losses should not be considered when developing thermal conductor models, so such losses are typically omitted when developing dynamic line rating (DLR) applications. DLR is a set of techniques based on dynamically changing the thermal ratings of transmission lines based on changes in environmental conditions (wind, temperature, etc.). To develop accurate DLR models that include corona losses, a large amount of line data is required, including operating voltage, complete conductor information (materials, dimensions, etc.), bundle and line geometry, phase layout, and ground clearance, among others. To validate the accuracy of such models, part of the complete line data, long-term measurements of instantaneous corona losses in existing lines, operating voltage and weather conditions are required. However, the development of DLR approaches and the inclusion of corona losses in such models is severely limited by the lack of experimental work that includes a complete description of all this information. Based on experimental corona losses already published in the literature, this paper uses an accurate conductor model that accounts for radial heat transfer to show that, under certain conditions, corona losses are comparable to and even greater than Joule losses, which are usually the main source of conductor heating, suggesting that corona losses should be included in the development of accurate thermal conductor models. It has also been shown that for conductors in a normal condition, operating in fair weather conditions and at rated line load, corona losses are typically less than 2% of the Joule losses, resulting in a reduction of the maximum current carrying capacity of less than 1%. However, for heavily contaminated conductors, the reduction in current carrying capacity due to the effect of corona losses can be as high as 15%.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"166 ","pages":"Article 110546"},"PeriodicalIF":5.0,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143453759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pulsating power mitigation in poly-source DC microgrids with single-phase inverters: A theoretical analysis","authors":"Gleisson Balen,&nbsp;Cristian Blanco,&nbsp;Ángel Navarro-Rodríguez,&nbsp;Pablo García","doi":"10.1016/j.ijepes.2025.110452","DOIUrl":"10.1016/j.ijepes.2025.110452","url":null,"abstract":"<div><div>This paper describes a method to reduce the DC bus power oscillation in a multi-home building AC–DC hybrid microgrid containing renewable resources, energy storage elements, and building loads. In general, the connection of several single-phase inverters to a DC bus to supply AC loads generates a double-frequency power oscillation in the DC link. Usually, each single-phase inverter has a random voltage phase angle reference and a different load power factor that strongly influences the DC bus power quality. To solve this problem, a method is proposed to ensure a minimum power oscillation. The adopted strategy considers a lead controller, which calculates the optimal voltage reference phase angle for each inverter, considering the load apparent power and power factor. A theoretical analysis is presented, and a method for minimizing unwanted components on the DC bus is proposed. The proposed method is based on the correct definition of the AC reference phase of each single-phase converter by implementing a gradient descent optimization algorithm. The paper shows a verification with real AC load profiles, performing the DC bus power low-frequency oscillation mitigation, reaching a 95% power oscillation reduction.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"166 ","pages":"Article 110452"},"PeriodicalIF":5.0,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143445713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A non-iterative distributed approximate dynamic programming algorithm for frequency security-constrained stochastic economic dispatch","authors":"Xiangyong Feng ,&nbsp;Shunjiang Lin ,&nbsp;Yutao Liang ,&nbsp;Yanghua Liu ,&nbsp;Mingbo Liu","doi":"10.1016/j.ijepes.2025.110543","DOIUrl":"10.1016/j.ijepes.2025.110543","url":null,"abstract":"<div><div>Due to uncertainties associated with the power output of offshore wind farms, the active power balance and frequency security control of power systems with lots of offshore wind farms are highly challenging. To address this problem, in this study, a new stochastic economic dispatch model of a power system with offshore wind farms considering the system frequency security constraints is established to obtain economic and secure dispatch decisions. Furthermore, the nonlinear convexity of frequency security constraints provides considerable theoretical support for the global optimality of decision-making, and a golden section search-based approximate linear constraint generation algorithm is designed to approximate nonlinear frequency security constraints for improving computational efficiency. Next, a non-iterative distributed approximate dynamic programming algorithm based on the equivalent projection method is designed for the distributed solution of the established model. In the algorithm, first, the model is decoupled from time periods. Next, the high-dimensional feasible region of the offshore wind farm optimization model is projected into a low-dimensional feasible region and substituted into the transmission grid optimization model, and solves the models of the transmission grid and the offshore wind farms sequentially to achieve the non-iterative distributed solution. Finally, case studies on a modified IEEE 39-bus system with two offshore wind farms and an actual provincial system with seven offshore wind farms demonstrate the effectiveness and superiority of the proposed model and algorithm, reducing solution time by over 86.4% compared to the alternating direction method of multipliers-based distributed approximate dynamic programming algorithm.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"166 ","pages":"Article 110543"},"PeriodicalIF":5.0,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143445712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Power-speed coupling response characteristics of variable speed pumped storage unit under pumping mode","authors":"Rui Cao ,&nbsp;Wencheng Guo ,&nbsp;Chao Wang","doi":"10.1016/j.ijepes.2025.110544","DOIUrl":"10.1016/j.ijepes.2025.110544","url":null,"abstract":"<div><div>Variable speed pumped storage unit (VSPSU) has the advantage of adjustable power under pumping mode, which can better meet the regulation demand of power grid. This paper aims to study the power-speed coupling response characteristics (CRCs) of VSPSU under pumping mode. Firstly, the model of VSPSU under pumping mode is established, and the power-speed CRCs are revealed. Then, the influence of regulating parameters on the power-speed CRCs is explored. Finally, the influence mechanism of power regulation of VSPSU is clarified. The results show that the VSPSU can realize power regulation by adjusting the speed through the frequency convertor. The transient response processes of power and speed are basically consistent in the overall trend, but the regulation quality of speed is better than that of power. The regulating parameters of the speed outer loop of frequency converter have obvious influence on the power-speed CRCs of VSPSU, but the regulating parameters of current inner loop of the frequency converter and the governor have little effect. With the decrease of initial speed or the increase of speed regulation amplitude, the power regulation amplitude increases, and the power regulation amplitude under decreased speed regulation scenarios is greater than that under increased speed regulation scenarios. When the power regulation amplitude is the same under different working heads, the speed regulation amplitude decreases with the increase of working head, and the speed regulation amplitude under decreased power regulation scenarios is smaller than that under increased power regulation scenarios.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"166 ","pages":"Article 110544"},"PeriodicalIF":5.0,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143453851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}