International Journal of Electrical Power & Energy Systems最新文献_第10页

Pulsating power mitigation in poly-source DC microgrids with single-phase inverters: A theoretical analysis

IF 5 2区工程技术

International Journal of Electrical Power & Energy Systems Pub Date : 2025-02-20 DOI: 10.1016/j.ijepes.2025.110452

Gleisson Balen, Cristian Blanco, Ángel Navarro-Rodríguez, Pablo García

{"title":"Pulsating power mitigation in poly-source DC microgrids with single-phase inverters: A theoretical analysis","authors":"Gleisson Balen, Cristian Blanco, Ángel Navarro-Rodríguez, 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}

引用次数: 0

A non-iterative distributed approximate dynamic programming algorithm for frequency security-constrained stochastic economic dispatch

IF 5 2区工程技术

International Journal of Electrical Power & Energy Systems Pub Date : 2025-02-20 DOI: 10.1016/j.ijepes.2025.110543

Xiangyong Feng , Shunjiang Lin , Yutao Liang , Yanghua Liu , Mingbo Liu

{"title":"A non-iterative distributed approximate dynamic programming algorithm for frequency security-constrained stochastic economic dispatch","authors":"Xiangyong Feng , Shunjiang Lin , Yutao Liang , Yanghua Liu , 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}

引用次数: 0

Power-speed coupling response characteristics of variable speed pumped storage unit under pumping mode

IF 5 2区工程技术

International Journal of Electrical Power & Energy Systems Pub Date : 2025-02-20 DOI: 10.1016/j.ijepes.2025.110544

Rui Cao , Wencheng Guo , Chao Wang

{"title":"Power-speed coupling response characteristics of variable speed pumped storage unit under pumping mode","authors":"Rui Cao , Wencheng Guo , 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}

引用次数: 0

A comprehensive overview of high-speed solid-rotor induction machines: Applications, classification, and multi-physics modeling

IF 5 2区工程技术

International Journal of Electrical Power & Energy Systems Pub Date : 2025-02-19 DOI: 10.1016/j.ijepes.2025.110520

Vladimir Bilek , Jan Barta , Marek Toman , Petr Losak , Gerd Bramerdorfer

{"title":"A comprehensive overview of high-speed solid-rotor induction machines: Applications, classification, and multi-physics modeling","authors":"Vladimir Bilek , Jan Barta , Marek Toman , Petr Losak , Gerd Bramerdorfer","doi":"10.1016/j.ijepes.2025.110520","DOIUrl":"10.1016/j.ijepes.2025.110520","url":null,"abstract":"<div><div>Solid-rotor induction machines have gained significant attention in various industrial applications due to their robustness, reliability, and cost-effectiveness. This paper presents a comprehensive overview of these machines, covering their classification and various applications. The paper starts with discussing the widespread usage of solid-rotor induction machines in numerous industry sectors, including manufacturing, transportation, and renewable energy generation. The ability to operate under harsh environmental conditions and in safety-critical settings has made these machines indispensable in many fields of engineering. Their detailed classification based on different rotor topologies is provided, highlighting the unique design features and performance characteristics of each category. Simple and hybrid configurations and their distinct advantages and limitations in specific applications are included. This paper further explores the essential aspects of multi-physics modeling of solid-rotor induction machines, incorporating electromagnetic, mechanical, and thermal considerations to gain deep insights into the complex interactions between components and to guide the optimization process for enhanced performance and efficiency. This work is intended as a valuable reference for researchers and engineers seeking a comprehensive understanding of solid-rotor induction machines, from their diverse applications to the intricacies of their electromagnetic, thermal, and mechanical modeling. By shedding light on these aspects, this work contributes to the advancement and utilization uptake of these machines in modern industrial settings.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"166 ","pages":"Article 110520"},"PeriodicalIF":5.0,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437170","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}

引用次数: 0

Cooperative optimal operation of multi-microgrids and shared energy storage for voltage regulation of distribution networks based on improved Nash bargaining

IF 5 2区工程技术

International Journal of Electrical Power & Energy Systems Pub Date : 2025-02-19 DOI: 10.1016/j.ijepes.2025.110532

Keyu Zhang , Jian Chen , Xianglong Qi , Wen Zhang , Meijia Wei , Da Lin

{"title":"Cooperative optimal operation of multi-microgrids and shared energy storage for voltage regulation of distribution networks based on improved Nash bargaining","authors":"Keyu Zhang , Jian Chen , Xianglong Qi , Wen Zhang , Meijia Wei , Da Lin","doi":"10.1016/j.ijepes.2025.110532","DOIUrl":"10.1016/j.ijepes.2025.110532","url":null,"abstract":"<div><div>The increasing penetration rate of distributed generation will bring serious voltage violation issues to the distribution networks (DNs). As an effective organization form of distributed generation, microgrids (MGs) have flexible adjustment ability, which can provide voltage support for DNs. To enhance the energy economy and scheduling flexibility of MGs, shared energy storage system (SESS) has received widespread attention as a new type of energy storage technology. To this end, this paper proposes a cooperative optimal operation strategy of MGs and SESS aimed at voltage regulation in DNs. A two-stage cooperative optimization model based on Nash bargaining theory is established for MGs and SESS. In the first stage, the DN is partitioned using an improved electrical distance approach that incorporates voltage regulation incentives, with the objective of minimizing the cooperation costs for MGs and SESS. The second stage involves quantifying the contributions of each participant through a nonlinear energy mapping function, followed by the development of the trading price based on asymmetric bargaining informed by improved Nash bargaining. The goal of this approach is to ensure that MGs and SESS share cooperative benefits fairly. The alternating direction method of the multiplier (ADMM) is used to solve the problems, effectively protecting the privacy of each participating subject. Finally, the effectiveness of the proposed method is demonstrated through an analysis of the improved IEEE 33-node system.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"166 ","pages":"Article 110532"},"PeriodicalIF":5.0,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437166","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}

引用次数: 0

A two-stage active current limiting control coordinated protection scheme for multi-terminal MMC-HVDC grid

IF 5 2区工程技术

International Journal of Electrical Power & Energy Systems Pub Date : 2025-02-19 DOI: 10.1016/j.ijepes.2025.110530

Yao Sun , Junjie Hou , Yanfang Fan , Guobing Song

{"title":"A two-stage active current limiting control coordinated protection scheme for multi-terminal MMC-HVDC grid","authors":"Yao Sun , Junjie Hou , Yanfang Fan , Guobing Song","doi":"10.1016/j.ijepes.2025.110530","DOIUrl":"10.1016/j.ijepes.2025.110530","url":null,"abstract":"<div><div>The inherent flexible and controllable characteristics of the multi-terminal flexible DC grid based on modular multilevel converters (MMCs) have opened up new avenues for the research on fault current limitation and line fault identification. Existing active current limitation control strategies and fault identification methods operate independently, without considering their interplay and mutual influence, leading to an inability to fully integrate them. To enhance the synergy between active current limitation control and protection, this paper introduces a two-stage active current limiting control coordinated protection scheme for half-bridge MMCs. Firstly, the interdependence between current limitation control and fault identification is established; building on this, to prevent rapid blocking of MMCs post short-circuit faults and the impact of fault characteristic changes on the reliability of fault identification, the first stage of current limitation control is implemented using AC virtual impedance control. This approach limits the arm current without modifying the DC-side fault characteristics, thus creating favorable conditions for existing protection. Secondly, line boundary properties are leveraged to delineate the scope for the second stage of DC-side current limitation control, enabling selective deployment of current limitation measures and curbing the propagation of fault impacts. Finally, by integrating the current limitation areas with directional elements, reliable fault identification is accomplished. Simulation outcomes indicate that the proposed scheme effectively limits both AC and DC currents, providing a novel perspective for the convergence of current limitation control and fault identification.</div><div>© 2017 Elsevier Inc. All rights reserved.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"166 ","pages":"Article 110530"},"PeriodicalIF":5.0,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437169","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}

引用次数: 0

A multiple choice relaxation model to solve the AC optimal power flow

IF 5 2区工程技术

International Journal of Electrical Power & Energy Systems Pub Date : 2025-02-18 DOI: 10.1016/j.ijepes.2025.110533

Fatemeh Zadehmohammadi, Hossein Sharifzadeh

{"title":"A multiple choice relaxation model to solve the AC optimal power flow","authors":"Fatemeh Zadehmohammadi, Hossein Sharifzadeh","doi":"10.1016/j.ijepes.2025.110533","DOIUrl":"10.1016/j.ijepes.2025.110533","url":null,"abstract":"<div><div>Mathematically speaking, AC optimal power flow (OPF), seeking an optimal state of a power system, is an NP-hard nonconvex optimization problem. In the past two decades, many researchers have attempted to accurately solve the AC OPF problem, that is, derive its globally optimal solution, primarily using relaxation methods. This paper presents a mixed-integer relaxation of AC OPF relying on polyhedral envelopes and a multiple choice model. To this end, first, we recast all nonlinear terms in the AC OPF as bilinear and quadratic terms having known linear approximation errors. Then, all these terms are replaced with their polyhedral envelopes. Last, the polyhedral envelopes are represented as a mixed-integer linear relaxation model using the multiple choice modeling technique. We also design an iterative solution method with a bound-tightening technique where one can improve the approximate functions and derive tighter relaxations progressively. The conducted computational experiment shows that the presented method can tightly relax the AC OPF and accurately solve the adopted case studies. The presented comparisons with 43 previous studies show that the proposed method can outperform earlier AC OPF solution techniques in solution optimality in the adopted case studies.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"166 ","pages":"Article 110533"},"PeriodicalIF":5.0,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437275","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}

引用次数: 0

Improved cross-entropy-based power system reliability evaluation using GMM with highly-efficient closed-form parameter updating

IF 5 2区工程技术

International Journal of Electrical Power & Energy Systems Pub Date : 2025-02-18 DOI: 10.1016/j.ijepes.2025.110535

Yuan Zhao, Jiaqin Hu, Kaigui Xie, Junjie Tang

{"title":"Improved cross-entropy-based power system reliability evaluation using GMM with highly-efficient closed-form parameter updating","authors":"Yuan Zhao, Jiaqin Hu, Kaigui Xie, Junjie Tang","doi":"10.1016/j.ijepes.2025.110535","DOIUrl":"10.1016/j.ijepes.2025.110535","url":null,"abstract":"<div><div>The reliability evaluation of composite generation and transmission systems (CSRE) is essential for power system planning and operation but often faces significant computational challenges. To accelerate CSRE, the Gaussian mixture model (GMM), known for its ability to model arbitrary probability densities, has been incorporated into the Cross-Entropy Method (CEM) to estimate the importance sampling probability density function (IS-PDF) of continuous random variables, such as correlated wind speeds and system load. However, the classical CEM produces a non-closed-form solution for the GMM-based IS-PDF, resulting in an alternating parameter updating procedure for the GMM parameter set and larger pre-simulation cost. To address this issue and enhance the simulation speed of CEM-based CSRE, an improved CEM with a highly efficient closed-form parameter updating mechanism is proposed. By developing an equivalent variant of the GMM that belongs to the exponential family, a closed-form solution is derived, eliminating the need for alternating updates. The improved CEM achieves higher efficiency and simplifies the modeling of the GMM-based IS-PDF. Numerical tests are conducted to validate the performance and advantages of the proposed method.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"166 ","pages":"Article 110535"},"PeriodicalIF":5.0,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437168","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}

引用次数: 0

An efficient approach for diagnosing faults in photovoltaic array using 1D-CNN and feature selection Techniques

IF 5 2区工程技术

International Journal of Electrical Power & Energy Systems Pub Date : 2025-02-18 DOI: 10.1016/j.ijepes.2025.110526

Yousif Mahmoud Ali , Lei Ding , Shiyao Qin

{"title":"An efficient approach for diagnosing faults in photovoltaic array using 1D-CNN and feature selection Techniques","authors":"Yousif Mahmoud Ali , Lei Ding , Shiyao Qin","doi":"10.1016/j.ijepes.2025.110526","DOIUrl":"10.1016/j.ijepes.2025.110526","url":null,"abstract":"<div><div>Diagnosing faults in Photovoltaic (PV) systems is essential for operation and maintenance. Selecting relevant features is necessary for successful fault diagnosis because redundant and irrelevant features reduce fault diagnosing accuracy. This paper proposes a novel and efficient approach to diagnosing faults in PV systems. The Feature Selection and Fault Diagnosis (FSFD) method is executed for diagnosing five types of faults in PV array (PVA): partial shading condition, line-line fault, arc fault, open-circuit fault, and degradation fault. Firstly, a PVA modeling method using MATLAB/Simulink is employed to simulate I-V curves and extract their features. Next, a feature permutation technique-based method is proposed for selecting the most relevant features. A simple and accurate one-dimensional convolutional neural network (1D-CNN) model is developed to classify the faults based on the selected features. Finally, a confusion matrix is utilized to evaluate the performance of the trained model. Three datasets of PVAs have been utilized to evaluate the effectiveness of the proposed FSFD method. The results indicate that the FSFD method has effectively identified the best five features out of eight for training the 1D-CNN model. The trained model has achieved diagnosing accuracy rates of 99.85%, 99.73%, and 99.97% in series–parallel PVA, total cross-tied PVA, and series PVA datasets, respectively. The proposed method accurately diagnoses single faults in three PVA configurations. Therefore, we recommend conducting additional studies to improve the proposed method for diagnosing hybrid faults.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"166 ","pages":"Article 110526"},"PeriodicalIF":5.0,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437165","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}

引用次数: 0

Study on the mechanism of horizontally striped contamination distribution along the surface of dry-type transformers and its influence on electric field characteristics

IF 5 2区工程技术

International Journal of Electrical Power & Energy Systems Pub Date : 2025-02-18 DOI: 10.1016/j.ijepes.2025.110542

Xinhan Qiao , Wei Li , Yue Ming , Zishang Zhu , Wentian Zeng , Yijiao Wang

{"title":"Study on the mechanism of horizontally striped contamination distribution along the surface of dry-type transformers and its influence on electric field characteristics","authors":"Xinhan Qiao , Wei Li , Yue Ming , Zishang Zhu , Wentian Zeng , Yijiao Wang","doi":"10.1016/j.ijepes.2025.110542","DOIUrl":"10.1016/j.ijepes.2025.110542","url":null,"abstract":"<div><div>Dry-type transformers have the advantages of strong anti-short circuit ability, low maintenance workload, and low noise. They are commonly used in places with high performance requirements for fire and explosion prevention. However, due to the direct exposure of its insulation material to air, surface discharge in specific environments poses a threat to the safe operation of transformers. This paper observed a special contamination distribution of “horizontally striped contamination on the surface of high-voltage windings” in engineering practice, and discovered a corresponding new phenomenon of “surface discharge along a circular path”. Therefore, this paper systematically studied this special phenomenon through finite element and micro mechanical analysis. This paper found that a specific winding connection sequence can lead to a larger local electric field. The electric field force exerted on contaminated particles after being charged is the main reason for the formation of “horizontally striped contamination”. The “horizontally striped contamination” further leads to an increase in electric field, ultimately forming a new phenomenon of “surface discharge along a circular path”. In addition, wet contamination can create dry areas, and wet contamination with dry areas can cause more severe distortion of the electric field on the surface of transformers. The surface electric field of wet inorganic salt contamination with dry areas is the most severely distorted. The maximum electric field strength can reach 3.6562 kV/cm. Compared to the maximum electric field strength of 1.1581 kV/cm without pollution, it increases by 215.71 %. The research results of this paper can provide theoretical basis for the optimization design of winding structure of dry-type transformers in polluted regions.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"166 ","pages":"Article 110542"},"PeriodicalIF":5.0,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437167","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}

引用次数: 0