Electric Power Systems Research最新文献_第5页

Clarifying the conditions under which the LEMP significantly affects lightning flashover rates of medium-voltage distribution lines

IF 3.3 3区工程技术

Electric Power Systems Research Pub Date : 2025-02-12 DOI: 10.1016/j.epsr.2025.111515

Akifumi Yamanaka, Kazuyuki Ishimoto

{"title":"Clarifying the conditions under which the LEMP significantly affects lightning flashover rates of medium-voltage distribution lines","authors":"Akifumi Yamanaka, Kazuyuki Ishimoto","doi":"10.1016/j.epsr.2025.111515","DOIUrl":"10.1016/j.epsr.2025.111515","url":null,"abstract":"<div><div>Lightning strikes on distribution lines can disrupt the operation of electric power systems, and hence it is crucial to accurately estimate the lightning performance by comparing various protection strategies. Recent studies have shown that the lightning electromagnetic pulses (LEMPs), which generate lightning-induced voltages in distribution lines, have a significant impact on the overvoltages generated even by direct strikes. This study aimed to clarify the conditions under which the LEMP significantly affects flashover rates (FORs) because considering the LEMP for direct lightning surge analysis requires additional calculations for electromagnetic transient analysis. We evaluated the LEMP impact on the FORs by considering the parameters as follows: soil resistivity (grounding resistance), intervals of surge arresters (SAs), and critical flashover voltages (CFOs). The analyses clarified that the LEMP impact is significant for lines with a coarse interval of SAs and low soil resistivity; this trend is emphasized by a high CFO. The impact is insignificant for lines with a close interval of SAs or a high resistivity. Although considering the LEMP impact is important for performing an accurate analysis, it can be neglected in the latter conditions, facilitating an efficient lightning performance assessment of distribution lines taking account of various protection strategies.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"243 ","pages":"Article 111515"},"PeriodicalIF":3.3,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143387650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A hierarchical evaluation method for power quality of microgrid cluster based on multi-temporal and spatial scales fusion analysis

IF 3.3 3区工程技术

Electric Power Systems Research Pub Date : 2025-02-12 DOI: 10.1016/j.epsr.2025.111473

Zhongmei Suo, HongTao Shi, Xinxin Meng, Bai Zhang, Lan Lan

{"title":"A hierarchical evaluation method for power quality of microgrid cluster based on multi-temporal and spatial scales fusion analysis","authors":"Zhongmei Suo, HongTao Shi, Xinxin Meng, Bai Zhang, Lan Lan","doi":"10.1016/j.epsr.2025.111473","DOIUrl":"10.1016/j.epsr.2025.111473","url":null,"abstract":"<div><div>The power quality (PQ) assessment for microgrid cluster (MGC) is essential for management. However, there is a lack of in-depth exploration and refinement on how to conduct a hierarchical assessment of the PQ for MGC on multi-temporal and spatial scales. To address the above issues, a novel hierarchical assessment method on multi-temporal and spatial scales is innovatively proposed in this paper. Firstly, on the time scale, the principal component kernel density estimation (PCA-KDE) fusion analysis, improved criteria importance through intercriteria correlation kernel density estimation (CRITIC-KDE) fusion analysis, and transgressive kernel density analysis are employed to capture the long-term trend, short-term changes, and fast response of PQ, respectively, and quantify its uncertainty and volatility through the standard deviation (SD) of the kernel density function. Furthermore, on the spatial scale, the assessment structure and the logical connection between the levels are clarified, and the PQ localization is realized by combining the multi-timescale assessment results with the spatial structure of MGC. Finally, examples show that compared with traditional methods, the uncertainty of PQ of MGC in the proposed method is fully revealed from multiple dimensions. The PQ index exceedance rate is increased to 50 % or 83 % on ultra-short scale, the evaluation score is reduced by about 10 % on short time scale, and the PQ score is reduced by about 15 % on long time scale, providing more reasonable decision support for the management of MGC.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"243 ","pages":"Article 111473"},"PeriodicalIF":3.3,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143386319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Applications of the partial element equivalent circuit method in computational electromagnetics simulation: An overview

IF 3.3 3区工程技术

Electric Power Systems Research Pub Date : 2025-02-11 DOI: 10.1016/j.epsr.2025.111487

Dinusha Maramba Gamage, Madhawa Ranasinghe, Venkata Dinavahi

{"title":"Applications of the partial element equivalent circuit method in computational electromagnetics simulation: An overview","authors":"Dinusha Maramba Gamage, Madhawa Ranasinghe, Venkata Dinavahi","doi":"10.1016/j.epsr.2025.111487","DOIUrl":"10.1016/j.epsr.2025.111487","url":null,"abstract":"<div><div>Computational electromagnetics (CEM) simulation is employed in diverse applications to analyze electromagnetic (EM) fields and waves, providing critical insights essential for design and optimization. Among the various available CEM techniques, such as the finite element method (FEM) and the finite-difference time-domain (FDTD) method, the partial element equivalent circuit (PEEC) method is an upcoming and preferred technique in certain applications due to its capability to integrate EM and circuit simulations, as well as its reduced computational cost. Consequently, publications based on the PEEC method have exhibited an increasing trend in the recent years. This study provides a comprehensive overview of PEEC-based applications across various fields to address prevailing problems in these applications. The survey categorizes the publications based on the type of application and provides detailed information on the techniques used and the results obtained. This work also briefly highlights the growing trend of adopting model order reduction (MOR) techniques, emphasizing their compatibility with the partial element equivalent circuit (PEEC) method to achieve more efficient and effective solutions. This review paper is valuable for researchers and engineers in related fields, aiding them in pinpointing future research opportunities and effectively employing the PEEC technique.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"243 ","pages":"Article 111487"},"PeriodicalIF":3.3,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143387651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on factors influencing the impulse withstand capacity of zinc oxide varistors

IF 3.3 3区工程技术

Electric Power Systems Research Pub Date : 2025-02-11 DOI: 10.1016/j.epsr.2025.111421

Zhiming Liao , Jie Zhang , Yongxia Han , Licheng Li , Peixuan Zhang , Yuanzhi Wu , Xin Luo , Taishan Hu

{"title":"Study on factors influencing the impulse withstand capacity of zinc oxide varistors","authors":"Zhiming Liao , Jie Zhang , Yongxia Han , Licheng Li , Peixuan Zhang , Yuanzhi Wu , Xin Luo , Taishan Hu","doi":"10.1016/j.epsr.2025.111421","DOIUrl":"10.1016/j.epsr.2025.111421","url":null,"abstract":"<div><div>The impulse withstand capacity of zinc oxide (ZnO) varistors is crucial to the reliable performance of arresters, and is influenced by factors such as the impulse current waveform, amplitude, and the number of impulses. This paper studied the effects of these factors on the damage modes and aging degree of ZnO varistors through repetitive impulse testing. The test results indicate that side flashover is the predominant damage mode under different impulse current waveforms (8/20 μs and 15/35 μs), and the probability of pinhole and cracking damage increases with both the current amplitude and the number of impulses per group. The aging degree increases with the shortening of the current waveform, as well as with the increase in both the current amplitude and the number of impulses per group. Side flashover significantly reduces the lifespan of ZnO varistors, and the application of glass glaze remains ineffective in preventing this damage. The evaluation of impulse withstand capacity should consider the effect of current waveforms. These findings provide valuable insights for improving impulse test methods and enhancing the impulse withstand capacity of ZnO varistors.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"243 ","pages":"Article 111421"},"PeriodicalIF":3.3,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143378416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimization method of low carbon park integrated energy system based on multi-agent game

IF 3.3 3区工程技术

Electric Power Systems Research Pub Date : 2025-02-11 DOI: 10.1016/j.epsr.2025.111484

Weichen Liang , Shusheng Wang , Xuan Li , Xintong Li , Kaiwen Xu

引用次数: 0

Series-type fractional-order electric spring for energy storage reduction

IF 3.3 3区工程技术

Electric Power Systems Research Pub Date : 2025-02-10 DOI: 10.1016/j.epsr.2025.111482

Dongyuan Qiu , Yuchen Zhang , Jing Zi , Bo Zhang , Yanfeng Chen , Fan Xie , Wenxun Xiao , Minglei Xie

{"title":"Series-type fractional-order electric spring for energy storage reduction","authors":"Dongyuan Qiu , Yuchen Zhang , Jing Zi , Bo Zhang , Yanfeng Chen , Fan Xie , Wenxun Xiao , Minglei Xie","doi":"10.1016/j.epsr.2025.111482","DOIUrl":"10.1016/j.epsr.2025.111482","url":null,"abstract":"<div><div>The rise of renewable energy sources (RES) has highlighted the demand for energy storage. However, the high costs associated with battery energy storage systems (BESS) pose significant barriers to wider adoption of RES. Electrical springs (ESs) have the potential to reduce the dependency of RES systems on storage capacity. In conventional ES setups, power fluctuations are managed by connecting ES in series with non-critical load (NCL) to stabilize the voltage of critical load (CL). However, this approach results in considerable voltage variations for NCL and is limited by the number of available NCL. To address the challenges in distribution networks with a limited number of CL, this paper proposes a series-type fractional-order ES (S-FES) by connecting ES in series with CL directly. Leveraging the ability of fractional-order component (FOC) to absorb or dissipate active power at various orders, the S-FES maintains stable voltage for CL by adjusting the fractional order and impedance, thereby reducing the overall energy storage requirements. Under comparable conditions, the proposed S-FES can reduce the energy storage capacity by approximately 70% compared to BESS, while improving the power factor (PF) to unity.The paper then goes on to detail the topology and control strategy of the S-FES, and demonstrates its effectiveness through simulation and experimental results.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"243 ","pages":"Article 111482"},"PeriodicalIF":3.3,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143376722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of wideband interactions in multiple offshore wind farms interconnected with AC grids

IF 3.3 3区工程技术

Electric Power Systems Research Pub Date : 2025-02-10 DOI: 10.1016/j.epsr.2025.111489

Lei Gao, Jing Lyu, Xu Cai

{"title":"Analysis of wideband interactions in multiple offshore wind farms interconnected with AC grids","authors":"Lei Gao, Jing Lyu, Xu Cai","doi":"10.1016/j.epsr.2025.111489","DOIUrl":"10.1016/j.epsr.2025.111489","url":null,"abstract":"<div><div>The increasing integration of wind power sources into power grids has elevated the risks of wideband oscillations in offshore wind farm (OWF) projects. The stability of interconnected systems in the wideband frequency range is not yet fully understood, which poses challenges for effective power grid planning and operation. This paper investigates the wideband interaction stability of three OWFs interconnected to two AC grids in a meshed network configuration. Firstly, a comprehensive small-signal state-space model is established and validated, incorporating wind power converter control, control delays, and distributed capacitance of transmission cables. Subsequently, the main influencing factors on the stability in different frequency bands are identified based on the participation factor and sensitivity analysis. Furthermore, the wideband stability including sub/super synchronous oscillation (SSO) and medium/high frequency oscillation (MFO/HFO) of the interconnected system is thoroughly analyzed by exploring the intricate interactions among OWF rated capacity, interconnected cables, transmission lines, and AC grids. The theoretical insights derived from this analysis hold significant value for the planning and design of practical OWFs. Finally, the case studies through time-domain simulations are carried out to verify the SSO and MFO/HFO stability analysis, respectively.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"243 ","pages":"Article 111489"},"PeriodicalIF":3.3,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143376721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Control performance analysis of an active power filter based on discrete predictors

IF 3.3 3区工程技术

Electric Power Systems Research Pub Date : 2025-02-10 DOI: 10.1016/j.epsr.2025.111470

Jonas S. da Silva , Jefferson R.P. de Assis , Darlan A. Fernandes , Nady Rocha , Alfeu J. Sguarezi-Filho

{"title":"Control performance analysis of an active power filter based on discrete predictors","authors":"Jonas S. da Silva , Jefferson R.P. de Assis , Darlan A. Fernandes , Nady Rocha , Alfeu J. Sguarezi-Filho","doi":"10.1016/j.epsr.2025.111470","DOIUrl":"10.1016/j.epsr.2025.111470","url":null,"abstract":"<div><div>The finite-control-set model predictive control (FCS-MPC) used in power electronics applications often relies on the Backward Euler method to discretize the predictors, which are intrinsic expressions of this control. This approach can be a limiting factor in achieving better performance. In this work, different techniques are presented for the discretization of predictors used in an FCS-MPC as the control system of a shunt active power filter (SAPF), which has the purpose of mitigating current distortions in the three-phase electrical grid. For each technique, different performance analyzes were used to control currents and DC-link voltage, such as response time, waveform quality, predictive cost function, and computational burden associated with simulation time. Therefore, the purpose of this work is to compare the performance of the techniques presented. To this end, four techniques are described, namely, Backward Euler, Trapezoidal, Centered Form, and Progressive Double Step (PDS). A description of the model is presented, based on the discretization techniques of the dynamic portion to obtain the predictors used in the control. In all cases, two prediction horizons were chosen, which proved to be suitable for mitigating distorted currents in the electrical grid and controlling DC-link voltage. The Simulink platform is used to extract online simulation results for the complete system, which includes the power grid, SAPF, nonlinear load, and control. The validation of the proposal is carried out using the results from a real-time simulator system OPAL-RT OP5700.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"243 ","pages":"Article 111470"},"PeriodicalIF":3.3,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143376723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Utility harmonic impedance estimation considering unsmooth fluctuation characteristics of background harmonics

IF 3.3 3区工程技术

Electric Power Systems Research Pub Date : 2025-02-08 DOI: 10.1016/j.epsr.2025.111513

Tong Ding, Mingxing Zhu, Yi Wen, Min Gao, Yadong Jiao, Qi Wei

{"title":"Utility harmonic impedance estimation considering unsmooth fluctuation characteristics of background harmonics","authors":"Tong Ding, Mingxing Zhu, Yi Wen, Min Gao, Yadong Jiao, Qi Wei","doi":"10.1016/j.epsr.2025.111513","DOIUrl":"10.1016/j.epsr.2025.111513","url":null,"abstract":"<div><div>Accurate estimation of utility harmonic impedance is key to harmonic source determination and harmonic mitigation. Most existing methods depend on the premise that the background harmonics remain constant or fluctuate smoothly, but in practice, the background harmonic voltage and impedance usually exhibit unsmooth variations or even abrupt changes. In light of this issue, this paper proposes a two-stage method for utility harmonic impedance estimation considering unsmooth fluctuation characteristics of background harmonics. In the first stage, multiple abrupt changes of background harmonics are identified through binary sliding T-test to segment the recorded harmonic voltage and current. In the second stage, the utility harmonic impedance is estimated by comprehensive minimum fluctuation and matrix sparsity within each recorded harmonic data interval. Simulation and field case studies are performed to verify the efficacy of the proposed method. The results demonstrate that this method surpasses other previous methods in computational accuracy and efficiency. Moreover, superior robustness against drastic background harmonic fluctuations is also exhibited.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"243 ","pages":"Article 111513"},"PeriodicalIF":3.3,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143350572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Coordinated control strategy for hybrid multi-PEMFC/BESS in a shipboard power system

IF 3.3 3区工程技术

Electric Power Systems Research Pub Date : 2025-02-08 DOI: 10.1016/j.epsr.2025.111495

Muhammad Aziz , Phi-Hai Trinh , Chairul Hudaya , Il-Yop Chung

{"title":"Coordinated control strategy for hybrid multi-PEMFC/BESS in a shipboard power system","authors":"Muhammad Aziz , Phi-Hai Trinh , Chairul Hudaya , Il-Yop Chung","doi":"10.1016/j.epsr.2025.111495","DOIUrl":"10.1016/j.epsr.2025.111495","url":null,"abstract":"<div><div>This paper presents a coordinated control strategy for a hybrid shipboard power system integrating multiple polymer electrolyte membrane fuel cells (PEMFCs) and battery energy storage system (BESS) units. The control strategy is developed to optimize the operational efficiency of PEMFCs, reduce hydrogen consumption, and stabilize the power system operation during dynamic load changes. A combination of master–slave and droop control methods is proposed to coordinate the outputs from multiple PEMFCs and BESS units while considering both system stability and efficiency. The developed model simulates the interaction between PEMFC as the primary power source and BESS as a support mechanism to ensure efficient and reliable power delivery. The simulation results validate the effectiveness of the proposed coordinated control strategy, demonstrating a 14.16 % improvement in system efficiency over conventional control strategies, with stable voltage tracking of the reference value throughout load variations. This study provides a robust framework for future applications of hybrid PEMFC/BESS systems in marine environments, contributing to the advancement of sustainable and efficient shipboard power systems.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"243 ","pages":"Article 111495"},"PeriodicalIF":3.3,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143350570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0