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

Strategic intentional islanding method considering temporary overvoltage in disaster situations

IF 5 2区工程技术

International Journal of Electrical Power & Energy Systems Pub Date : 2025-01-21 DOI: 10.1016/j.ijepes.2025.110488

Myungseok Yoon , Xuehan Zhang , Sungyun Choi

{"title":"Strategic intentional islanding method considering temporary overvoltage in disaster situations","authors":"Myungseok Yoon , Xuehan Zhang , Sungyun Choi","doi":"10.1016/j.ijepes.2025.110488","DOIUrl":"10.1016/j.ijepes.2025.110488","url":null,"abstract":"<div><div>Under disaster conditions, an intentional islanding operation in distribution systems is required to enhance resilience. This paper proposes a strategic islanding operation utilizing grid-forming (GFM) inverter-based distributed generation (DG) within a grid containing both GFM and grid-following (GFL) inverters. Unlike previous studies, this work uniquely addresses the temporary overvoltage (TOV) constraints that arise during multi-fault and consecutive fault conditions in islanded systems, which is critical for stable grid operation in disaster scenarios. The islanding operation problem is formulated as a knapsack problem and solved by a genetic algorithm, enabling optimal load supply and enhanced DG utilization under diverse disaster scenarios. Numerical simulations validate the effectiveness of the proposed method by exploring the impact of varying the percentage of ungrounded loads, the capacity of GFM inverter-based DGs, and the location of GFM inverters. The results emphasize that the reduction of grounded sources, which has not been evaluated in existing studies, negatively affects TOV and, therefore, impacts the reliability of islanding operations.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"165 ","pages":"Article 110488"},"PeriodicalIF":5.0,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142100","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

Time-domain protection scheme for inverter-dominated islanded microgrid using low-bandwidth communication channels

IF 5 2区工程技术

International Journal of Electrical Power & Energy Systems Pub Date : 2025-01-21 DOI: 10.1016/j.ijepes.2025.110485

A. Saber , A.M. Abdelemam , H.H. Zeineldin , Ehab F. El-Saadany

{"title":"Time-domain protection scheme for inverter-dominated islanded microgrid using low-bandwidth communication channels","authors":"A. Saber , A.M. Abdelemam , H.H. Zeineldin , Ehab F. El-Saadany","doi":"10.1016/j.ijepes.2025.110485","DOIUrl":"10.1016/j.ijepes.2025.110485","url":null,"abstract":"<div><div>This paper introduces a low-bandwidth communication time-domain protection scheme for inverter-dominated islanded microgrids. The developed scheme relies on pre- and post-fault current samples at line ends, and requires only sharing one value per phase between both line ends. Firstly, the identification function (IF) is developed by multiplying the phase current samples by its derivative at each line end. Next, the fault identification index (FII) is deduced to compare the pre- and post-fault identification functions at each line end. In order to differentiate between internal faults and other scenarios, the differential fault detection index (DFDI) is formulated via calculating the difference between both fault identification indices at both line ends. The developed scheme is validated by simulating the modified IEEE 33-bus microgrid on PSCAD/EMTDC, and different scenarios are carried out considering external and internal faults. Besides, the influence of different factors, such as high resistance faults and measurement errors, is investigated. Moreover, a real-time hardware-in-loop is conducted to verify the performance of the developed scheme. Compared with the existing techniques, the developed scheme is immune to the HRFs and measurements errors, and is independent of the inverters’ control strategies.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"165 ","pages":"Article 110485"},"PeriodicalIF":5.0,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142101","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

Double-layer stacking optimization for electricity theft detection considering data incompleteness and intra-class imbalance

IF 5 2区工程技术

International Journal of Electrical Power & Energy Systems Pub Date : 2025-01-21 DOI: 10.1016/j.ijepes.2025.110461

Leijiao Ge , Jingjing Li , Tianshuo Du , Luyang Hou

{"title":"Double-layer stacking optimization for electricity theft detection considering data incompleteness and intra-class imbalance","authors":"Leijiao Ge , Jingjing Li , Tianshuo Du , Luyang Hou","doi":"10.1016/j.ijepes.2025.110461","DOIUrl":"10.1016/j.ijepes.2025.110461","url":null,"abstract":"<div><div>Electricity theft detection is crucial for reducing non-technical losses in electric power enterprises and ensuring fairness in electric power transactions. However, challenges such as incomplete data, a scarcity of electricity theft samples, and limited performance of detection systems hinder accurate identification of theft. To address these issues, this paper presents a method utilizing a two-stage time-series generative adversarial network (TimeGAN) with an integrated two-layer stacking optimization configuration. The first phase tackles data incompleteness through an enhanced version of TimeGAN, employing embedding and recovery layers to reconstruct incomplete power user data. It introduces an analog denoising training method and supervised information assistance to improve the interpolation accuracy. In the second stage, the method addresses inter- and intra-class imbalances in electricity theft detection by employing the K-shape clustering algorithm to identify unique patterns within the theft data. This enables balanced synthesis of theft samples using these patterns as conditional supervisory terms for TimeGAN. To concurrently optimize the combination of the electricity theft detector (ETD) model and its hyperparameters, an integrated two-layer Stacking optimization framework is developed. This framework incorporates a time-varying binary transfer function and an external repository to enhance the performance of the optimization algorithm. Simulation tests performed on 42,372 actual power consumption records demonstrated that the proposed method achieved, on average, 8.23% higher DR scores, 3.45% higher AUC scores, and 5.60% higher Macro-F1 scores compared to the baseline method.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"165 ","pages":"Article 110461"},"PeriodicalIF":5.0,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142245","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

Faulty feeder detection based on transient attenuation and waveform similarity for low-resistance grounded system

IF 5 2区工程技术

International Journal of Electrical Power & Energy Systems Pub Date : 2025-01-20 DOI: 10.1016/j.ijepes.2025.110484

Jiandong Duan, Jinxuan Jiang, Wanying Yan, Zequan Hou

{"title":"Faulty feeder detection based on transient attenuation and waveform similarity for low-resistance grounded system","authors":"Jiandong Duan, Jinxuan Jiang, Wanying Yan, Zequan Hou","doi":"10.1016/j.ijepes.2025.110484","DOIUrl":"10.1016/j.ijepes.2025.110484","url":null,"abstract":"<div><div>In the case of a single-phase high-impedance fault (SPHIF) in a low-resistance grounded system (LRGS), the weak fault current makes it difficult to accurately detect the faulty feeder. To highlight the fault features, this paper first defines the concept of transient attenuation energy ratio and analyzes the fault features that can detect the faulty feeder. Under a specific phase condition, the transient attenuation energy ratio of the faulty feeder is much smaller than that of the healthy feeder. When the phase condition is not satisfied, the waveform similarity feature is analyzed to compensate for the lack of the transient attenuation energy ratio feature. Based on the two features, a comprehensive detection criterion for the faulty feeder is constructed. Moreover, to improve the efficiency and noise immunity of the feature parameter extraction process, this paper combines wavelet domain denoising and total least squares matrix pencil (WD-TLSMP). Based on this, a faulty feeder detection method that combines transient attenuation energy ratio and waveform similarity is proposed. The proposed method can accurately detect SPHIF under a variety of conditions as tested by simulation. Compared to other methods, it has a faster detection speed and is better adapted to intermittent SPHIFs.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"165 ","pages":"Article 110484"},"PeriodicalIF":5.0,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142616","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

Geometric power theory in the frequency domain for non-sinusoidal and unbalanced multiphase AC systems

IF 5 2区工程技术

International Journal of Electrical Power & Energy Systems Pub Date : 2025-01-20 DOI: 10.1016/j.ijepes.2025.110454

Francisco G. Montoya, Jorge Ventura, Alfredo Alcayde, Francisco M. Arrabal-Campos

引用次数: 0

A global inertia sharing control scheme for hybrid five-port power electronic transformer to achieve energy coordination, transient switching, and submodule balancing

IF 5 2区工程技术

International Journal of Electrical Power & Energy Systems Pub Date : 2025-01-18 DOI: 10.1016/j.ijepes.2025.110471

Wenjie Du, Wenjie Chen, Ling Li, Haowei Dang, Hongpeng Wang, Yongqi Huo, Huibin Wu, Ding Su, Xu Yang

{"title":"A global inertia sharing control scheme for hybrid five-port power electronic transformer to achieve energy coordination, transient switching, and submodule balancing","authors":"Wenjie Du, Wenjie Chen, Ling Li, Haowei Dang, Hongpeng Wang, Yongqi Huo, Huibin Wu, Ding Su, Xu Yang","doi":"10.1016/j.ijepes.2025.110471","DOIUrl":"10.1016/j.ijepes.2025.110471","url":null,"abstract":"<div><div>In high-power hybrid AC/DC distribution systems, multi-port power electronic transformer (PET) encounters challenges such as energy coordination, transient switching, and submodule balancing. In order to address these issues, especially improving transient dynamic performance, this paper proposes a global inertia sharing (GIS) control scheme for a hybrid five-port PET based on modular multilevel converter (MMC), dual active bridge (DAB), and energy storage system (ESS). Firstly, the scheme introduces an inertia sharing (IS) characteristic among internal submodules and external ports based on the capacitor’s properties, analyzing the control quantities and degrees of freedom for controlling IS. Next, according to the mathematical model of the PET, four IS controllers and three balancing controllers are designed for the GIS control scheme to achieve coordinated energy control, optimization of transient performance of the system, balance between submodules, and effectively reduce the number of control parameters and sampling hardware circuits. Additionally, the operation region of the system, power flow modes, and controller parameter selection are analyzed. Validation results in extreme conditions and numerous operating mode switching demonstrate that the proposed GIS control scheme enables seamless switching and submodule balancing under uninterrupted power supply, significantly enhancing system transient dynamic performance and enriching power flow modes.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"165 ","pages":"Article 110471"},"PeriodicalIF":5.0,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142625","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

Addressing intra-area oscillations and frequency stability after DC segmentation of a large AC power system

IF 5 2区工程技术

International Journal of Electrical Power & Energy Systems Pub Date : 2025-01-18 DOI: 10.1016/j.ijepes.2025.110467

M. Robin , J. Renedo , J.C. Gonzalez-Torres , A. Garcia-Cerrada , L. Rouco , A. Benchaib , P. Garcia-Gonzalez

{"title":"Addressing intra-area oscillations and frequency stability after DC segmentation of a large AC power system","authors":"M. Robin , J. Renedo , J.C. Gonzalez-Torres , A. Garcia-Cerrada , L. Rouco , A. Benchaib , P. Garcia-Gonzalez","doi":"10.1016/j.ijepes.2025.110467","DOIUrl":"10.1016/j.ijepes.2025.110467","url":null,"abstract":"<div><div>Several events have shown that electromechanical oscillations are a major concern for large interconnected Alternating Current (AC) power systems. Segmentation of AC power systems with High Voltage Direct Current (HVDC) systems (DC segmentation, for short) turns large AC grids into a set of asynchronous AC clusters linked by HVDC links. It is a promising solution to mitigate electromechanical oscillations and other issues. In particular, an appropriate placement of DC segmentation can stop a selected inter-area electromechanical oscillation mode. However, without supplementary controllers, DC segmentation will not contribute to the damping of the intra-area oscillation modes in the remaining AC clusters and frequency stability of the overall system will deteriorate. This paper studies the use of DC segmentation with HVDC systems based on Voltage Source Converters (VSC-HVDC) with active and reactive power supplementary controllers in the converter stations. The former were tailored for frequency support among the asynchronous AC clusters and the latter for Power-Oscillation Damping (POD-Q) of the intra-area oscillation modes. The proposed supplementary controllers and their design will be presented, and their efficiency will be demonstrated on the Nordic 44 test system with DC segmentation by means of non-linear time-domain simulation and small-signal stability analysis.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"165 ","pages":"Article 110467"},"PeriodicalIF":5.0,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142617","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

Fast sequential clearing of Congestion-Aware local energy and flexibility markets

IF 5 2区工程技术

International Journal of Electrical Power & Energy Systems Pub Date : 2025-01-16 DOI: 10.1016/j.ijepes.2025.110456

Meng Song , Xinyi Jing , Yunfeng Cai , Ciwei Gao , Yunting Yao , Mingyu Yan , Shuangxue Ren , Feng Li

{"title":"Fast sequential clearing of Congestion-Aware local energy and flexibility markets","authors":"Meng Song , Xinyi Jing , Yunfeng Cai , Ciwei Gao , Yunting Yao , Mingyu Yan , Shuangxue Ren , Feng Li","doi":"10.1016/j.ijepes.2025.110456","DOIUrl":"10.1016/j.ijepes.2025.110456","url":null,"abstract":"<div><div>The local energy market (LEM) is a promising solution to address the imbalance problem caused by the increasing renewable energy. The network costs can serve as a price signal to guide nearby trading. However, the security-constrained economic dispatch method with large-scale prosumers has a lower calculation efficiency which fails to meet the high-frequency clearing needs of the LEM. Therefore, this paper proposes a fast sequential clearing method for congestion-aware local energy and flexibility markets. The LEM is designed based on continuous double auctions (CDA) to clear the market quickly. During CDA, network losses, and transmission fees are dynamically calculated based on AC power flow sensitivity factors and added to the bids/offers. To address congestion issues and prevent transaction cancellations, a local flexibility market (LFM) is established to utilize prosumers’ flexible capacity. The Market clearing efficiency of LFM is improved by adopting the fictitious nodal demand (FND) model and linear approximation of inscribed regular polygon constraint. The improved CDA in LEM promotes local transactions and enables effective network cost recovery. The LFM expands the total transaction volume by employing local flexibility. Case studies validate that the proposed methodology improves clearing efficiency, benefits prosumers, and ensures the operational security of distribution networks.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"165 ","pages":"Article 110456"},"PeriodicalIF":5.0,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142626","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 study on carbon emission flow tracking for new type power systems

IF 5 2区工程技术

International Journal of Electrical Power & Energy Systems Pub Date : 2025-01-15 DOI: 10.1016/j.ijepes.2025.110455

Jiang Hu , Ke Qin , Rui Ma , Wenxia Liu , Jiayuan Zhang , Luming Pang , Jiawang Zhang

{"title":"A study on carbon emission flow tracking for new type power systems","authors":"Jiang Hu , Ke Qin , Rui Ma , Wenxia Liu , Jiayuan Zhang , Luming Pang , Jiawang Zhang","doi":"10.1016/j.ijepes.2025.110455","DOIUrl":"10.1016/j.ijepes.2025.110455","url":null,"abstract":"<div><div>The new energy system is a component and a key carrier for achieving the goal of “carbon peak/carbon neutrality”. Carbon emission flow tracking helps to clarify the carbon emission responsibility and provides important data support and decision-making basis for realizing the dual-carbon target. In view of this, a novel model is proposed to analyze the carbon emissions of units and loads within the power system. Firstly, the parameters at each node and branch are calculated using the Newton-Raphson method based on the nodal load data, generator power output, and so on. Secondly, the real-time carbon emission intensity model between different units is established considering the unit characteristics and fuel attributes. Then the power flow distribution matrix as well as the unit carbon emission injection intensity matrix are constructed, which are used to allocate the generator power to each node load, branch power and network loss, so as to obtain the corresponding power components. On this basis, the actual carbon consumption of the unit as well as the load in the corresponding period is calculated. The approach above makes it possible to characterize the distribution of carbon emission contributions within the system. By tracking power flow, an accurate quantification of the carbon emissions caused by network losses is achieved, which in turn provide an immediate allocation result for the system’s carbon emissions. Finally, the validity, accuracy and generalizability are verified in IEEE 5-bus and IEEE 39-bus standard systems. In addition, the application of the power flow tracking green certification model for green power traceability is prospected.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"165 ","pages":"Article 110455"},"PeriodicalIF":5.0,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142628","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 fault section location method based on the slope similarity of zero-sequence current waveform for the non-effectively grounding system

IF 5 2区工程技术

International Journal of Electrical Power & Energy Systems Pub Date : 2025-01-15 DOI: 10.1016/j.ijepes.2025.110470

Xinhui Zhang , Aiyu Guo , Changyong Hu , Shuyu Xie , Jinghua Wang

{"title":"A fault section location method based on the slope similarity of zero-sequence current waveform for the non-effectively grounding system","authors":"Xinhui Zhang , Aiyu Guo , Changyong Hu , Shuyu Xie , Jinghua Wang","doi":"10.1016/j.ijepes.2025.110470","DOIUrl":"10.1016/j.ijepes.2025.110470","url":null,"abstract":"<div><div>When a single-phase ground (SPG) fault occurs in a non-effectively grounding system (NUGS), it is crucial to locate the fault section quickly. However, existing detection methods for high-resistance grounding faults suffer from low locating accuracy, and their reliability needs urgent improvement. To address this issue, this paper analyzes the slope of the zero-sequence current at the upstream and downstream of the fault spot during a single-phase ground fault occurred in the NUGS. According to the differences in the slope curves between the upstream and downstream of the fault spot, this paper proposes a fault section location method that utilizes the similarity of the slope of the zero-sequence current waveform. First, the locally weighted linear regression (LWLR) is employed to fit the discrete zero-sequence current data collected at each detection point, obtaining the LWLR curve of the zero-sequence current, and accordingly, the corresponding slope curve is derived. Then, the Pearson product-moment correlation coefficient (PPMCC) of the two slope curves between adjacent detection spots is calculated. Finally, the fault section is determined by utilizing the principle that the similarity of the slope curves upstream and downstream of the fault spot is very low, that is, the section with the minimum PPMCC is judged as the fault section. Notably, this method does not require filtering out the power frequency component of the zero-sequence current, enabling excellent sensitivity in locating the high-resistance grounding fault sections. The locating results based on MATLAB/Simulink demonstrate the effectiveness of the proposed method in accurately pinpointing the fault section under various fault conditions.</div></div>","PeriodicalId":50326,"journal":{"name":"International Journal of Electrical Power & Energy Systems","volume":"165 ","pages":"Article 110470"},"PeriodicalIF":5.0,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142627","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