Electric Power Systems Research最新文献_第7页

Event-triggered islanding in inverter-based grids

IF 3.3 3区工程技术

Electric Power Systems Research Pub Date : 2025-02-06 DOI: 10.1016/j.epsr.2025.111472

Ioannis Zografopoulos , Charalambos Konstantinou

{"title":"Event-triggered islanding in inverter-based grids","authors":"Ioannis Zografopoulos , Charalambos Konstantinou","doi":"10.1016/j.epsr.2025.111472","DOIUrl":"10.1016/j.epsr.2025.111472","url":null,"abstract":"<div><div>The decentralization of modern power systems challenges the hierarchical structure of the electric grid and necessitates automated schemes to manage adverse conditions. This work proposes an adaptive isolation methodology that can divide a grid into autonomous islands, ensuring stable and economical operation amid deliberate or unintentional abnormal events. The adaptive isolation logic is event-triggered to prevent false positives, enhance detection accuracy, and reduce computational overhead. A measurement-based stable kernel representation (SKR) triggering mechanism initially inspects distributed generation controllers for abnormal behavior. The SKR then alerts an ensemble classifier to assess whether the system behavior remains within acceptable operational limits. The event-triggered adaptive isolation framework is evaluated using IEEE RTS-24 and 118-bus systems. Simulation results demonstrate that the proposed framework detects anomalous behavior with 100% accuracy in real-time, i.e., within <span><math><mrow><mn>22</mn></mrow></math></span> ms. Supply-adequate partitions are identified outperforming traditional islanding detection and formation techniques while minimizing operating costs.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"243 ","pages":"Article 111472"},"PeriodicalIF":3.3,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143264394","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 solar energy system with a dual-input power converter and global MPPT for off-grid applications

IF 3.3 3区工程技术

Electric Power Systems Research Pub Date : 2025-02-06 DOI: 10.1016/j.epsr.2025.111497

Hwa-Dong Liu , Bin-Juine Huang , Wei-Yu Chen , Jyun-Wei Shih

{"title":"A solar energy system with a dual-input power converter and global MPPT for off-grid applications","authors":"Hwa-Dong Liu , Bin-Juine Huang , Wei-Yu Chen , Jyun-Wei Shih","doi":"10.1016/j.epsr.2025.111497","DOIUrl":"10.1016/j.epsr.2025.111497","url":null,"abstract":"<div><div>This study presents the development of a 200 W standalone solar power generation system. The system incorporates a simple dual-input power converter, utilizing a 200 W photovoltaic (PV) panel and a battery set as primary energy sources. Advanced PV charge controller technology is integrated, enabling the system to supply power to the load while charging the battery under varying environmental conditions. To enhance efficiency, the system employs a global maximum power point tracking (MPPT) technique, achieving up to 99 % MPPT efficiency, even in partially shaded or uniform sunlight conditions. Additionally, the system offers flexible frequency and duty cycle adjustments, maintaining total harmonic distortion (THD) below 0.087 % to ensure high-quality power output. For outdoor installations, a lightning protection device has been incorporated to safeguard the system from lightning damage, thereby improving overall stability. Simulated and experimental validation confirm the system's suitability for standalone applications, demonstrating high efficiency and practical feasibility. Ultimately, this power generation system not only functions as a 200 W power control device but can also be expanded into a plug-and-play microinverter, making it suitable for home use and promoting the adoption of sustainable energy solutions.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"243 ","pages":"Article 111497"},"PeriodicalIF":3.3,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143264393","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

Integrated emergency control strategy for single/three-phase hybrid microgrid group coupling load correlation factors and under-frequency load shedding

IF 3.3 3区工程技术

Electric Power Systems Research Pub Date : 2025-02-05 DOI: 10.1016/j.epsr.2025.111481

Fang Huang , Tangxian Chen , Xuefei Zhang , Can Wang , Wenhan Chang , Yuzheng Liu , Zhuoli Zhao , Chun Sing Lai , Loi Lei Lai

{"title":"Integrated emergency control strategy for single/three-phase hybrid microgrid group coupling load correlation factors and under-frequency load shedding","authors":"Fang Huang , Tangxian Chen , Xuefei Zhang , Can Wang , Wenhan Chang , Yuzheng Liu , Zhuoli Zhao , Chun Sing Lai , Loi Lei Lai","doi":"10.1016/j.epsr.2025.111481","DOIUrl":"10.1016/j.epsr.2025.111481","url":null,"abstract":"<div><div>Under-frequency load shedding is a necessary measure for the elimination of power shortages in a single/three-phase hybrid microgrid group under unintentional islanding. To date, research studies have considered virtual three-phase combination, load evaluation, and load shedding separately, rather than as in integrated whole. Therefore, an integrated emergency control strategy for a single/three-phase hybrid microgrid group with coupled load correlation factors and under-frequency load shedding is proposed in this paper. First, to reduce the complexity of the model and shorten the time needed to obtain the load shedding decision, an integrated emergency control strategy framework for coupled virtual three-phase combination-load evaluation-load shedding is constructed based on the meta-model. Second, a multistrategy ant lion optimization (MSALO) algorithm is designed, which combines the Lévy flight mutation mechanism and the golden sine search strategy and updates the optimization position parameters to enhance the global optimization capabilities and local optimization efficiency. This algorithm is applied to the correction and dynamic updating of the meta-model parameters, aiming to generate optimal emergency control decisions. Finally, the proposed strategy is validated using the improved IEEE-37 node and the improved IEEE-118 node single/three-phase hybrid microgrid group models. The simulation results show that the proposed strategy can reduce the economic loss and three-phase imbalance degree during the emergency control period, reduce the frequency fluctuation range and the frequency recovery time, and improve the response speed of emergency control decision-making.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"242 ","pages":"Article 111481"},"PeriodicalIF":3.3,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143131197","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

An active or reactive power distribution anomaly detection scheme for marine parallel synchronous generators

IF 3.3 3区工程技术

Electric Power Systems Research Pub Date : 2025-02-05 DOI: 10.1016/j.epsr.2025.111485

Tuhao Li , Chongkai Fang , Longhua Mu , Wei Zhuang

{"title":"An active or reactive power distribution anomaly detection scheme for marine parallel synchronous generators","authors":"Tuhao Li , Chongkai Fang , Longhua Mu , Wei Zhuang","doi":"10.1016/j.epsr.2025.111485","DOIUrl":"10.1016/j.epsr.2025.111485","url":null,"abstract":"<div><div>Power distribution anomalies represent major challenges to the reliability of marine synchronous generators (SGs) operating in parallel, particularly due to failures in prime movers and excitation systems. Since most conventional anomaly detection methods rely on centralized structures, communication-independent schemes remain largely unexplored. By analyzing the well-established active power-frequency and reactive power-voltage droop characteristics of SGs, the mechanisms behind active and reactive power distribution anomalies are clarified, and anomaly detection models for marine generators are developed. A new power distribution anomaly detection scheme based on droop characteristics is proposed. The scheme utilizes a distributed structure that depends only on local information for proper operation, with corresponding anomaly warning and protection criteria established. Theoretical analysis and simulation results demonstrate that the proposed scheme effectively detects power distribution anomalies and isolates faulty generators from non-faulty ones. The scheme offers a practical solution to address power distribution anomalies in marine parallel SGs.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"242 ","pages":"Article 111485"},"PeriodicalIF":3.3,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143294247","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

Integrating autoencoders to improve fault classification with PV system insertion

IF 3.3 3区工程技术

Electric Power Systems Research Pub Date : 2025-02-05 DOI: 10.1016/j.epsr.2025.111426

Andréia Silva Santos , Reginaldo José da Silva , Paula Andrea Montenegro , Lucas Teles Faria , Mara Lúcia Martins Lopes , Carlos Roberto Minussi

{"title":"Integrating autoencoders to improve fault classification with PV system insertion","authors":"Andréia Silva Santos , Reginaldo José da Silva , Paula Andrea Montenegro , Lucas Teles Faria , Mara Lúcia Martins Lopes , Carlos Roberto Minussi","doi":"10.1016/j.epsr.2025.111426","DOIUrl":"10.1016/j.epsr.2025.111426","url":null,"abstract":"<div><div>The extensive integration of distributed generation (DG) units leads to significant changes in the operation of power distribution systems (PDS). Integrating DG units contributes to meeting the growing energy demand, diversifying the energy matrix, and reducing power grid losses. In contrast, they can affect conventional protection systems in power grids by altering current flow, which affects the characteristics, direction, and amplitude of short-circuit currents. Consequently, improper operation of protection equipment can cause false positives, negatively affecting the detection, classification, and reliability of the power grid. This study addresses fault classification in PDS, considering the extensive integration of DG units, specifically PV systems. PDS is evaluated at various levels of PV insertion using different fault scenarios modeled in the IEEE 34-bus test system. This includes five scenarios with variations in the PV system insertion. Autoencoders are applied during the pre-processing phase, while eleven different algorithms are used in the classification stage to identify fault types. They can improve the performance of the classification system by reducing the size of input signals and extracting the most relevant features. The results reveal that the K-nearest neighbor (KNN) and random forest (RF) algorithms demonstrate the best performance, maintaining a minimum accuracy of 95.42% in all scenarios.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"242 ","pages":"Article 111426"},"PeriodicalIF":3.3,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143294248","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

Sampled-data high gain observers for dynamic state estimation in power system

IF 3.3 3区工程技术

Electric Power Systems Research Pub Date : 2025-02-05 DOI: 10.1016/j.epsr.2025.111491

Irenge Baguma Raoul , Nkwawo Homère , Tarek Ahmed-Ali

引用次数: 0

Wide-Area damping control enhanced by non-invasive data verification against false data injection attacks

IF 3.3 3区工程技术

Electric Power Systems Research Pub Date : 2025-02-05 DOI: 10.1016/j.epsr.2025.111448

Zhenglong Sun , Hao Long , Zewei Li , Bo Gao , Xiaoqiang Wei , Yoash Levron , Juri Belikov

{"title":"Wide-Area damping control enhanced by non-invasive data verification against false data injection attacks","authors":"Zhenglong Sun , Hao Long , Zewei Li , Bo Gao , Xiaoqiang Wei , Yoash Levron , Juri Belikov","doi":"10.1016/j.epsr.2025.111448","DOIUrl":"10.1016/j.epsr.2025.111448","url":null,"abstract":"<div><div>The increasing interconnectivity of power systems and the integration of renewable energy sources into the grid have exacerbated the low-frequency oscillation problem, which directly impacts the stability of the power grid. The performance of wide-area damping control (WADC), which is an effective oscillation suppression technique, is susceptible to false data injection attacks (FDIA). In this study, a non-intrusive data verification method based on an adaptive variational autoencoder (AVAE) and a deep convolutional neural network (DCNN) is proposed to enhance the immunity of WADC to FDIA. The method constitutes a detection module by combining the data dimensionality reduction and reconstruction capability of AVAE and the feature extraction advantage of DCNN. By dynamically adapting to the cyclical changes of grid data through adaptive thresholds, it accurately identifies the behavior of the system in steady and transient states, effectively distinguishes normal and abnormal measurements, and significantly improves the accuracy of performance discrimination and attack detection. In addition, the study proposes an intelligent repair process based on latent representations for anomalous data in the repair module. The module utilizes hierarchical clustering and Gaussian mixture model (GMM) after Bayesian inference to repair the potential space of anomalous data. Then, it accurately repairs the anomalous data to mitigate the impact of attacks through AVAE reconstruction. Simulation experiments on IEEE 39-Bus, 68-Bus, and 118-Bus systems verify that the method can detect network attacks with high accuracy under different attack strengths and noise environments. It can restore manipulated signals with small reconstruction errors to ensure the stability and reliability of the power grid.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"242 ","pages":"Article 111448"},"PeriodicalIF":3.3,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143353614","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 novel grid dynamics indicator based advanced relay for grid connected microgrid under volatile conditions

IF 3.3 3区工程技术

Electric Power Systems Research Pub Date : 2025-02-05 DOI: 10.1016/j.epsr.2025.111460

Sindhura Miraj, Divya S. Nair, Rajeev T.

{"title":"A novel grid dynamics indicator based advanced relay for grid connected microgrid under volatile conditions","authors":"Sindhura Miraj, Divya S. Nair, Rajeev T.","doi":"10.1016/j.epsr.2025.111460","DOIUrl":"10.1016/j.epsr.2025.111460","url":null,"abstract":"<div><div>The large-scale penetration of renewable sources and dynamic load in a grid-connected microgrid leads to nuisance tripping due to the various dynamic circumstances involving transformer energizing, capacitor switching, source-side and load-side dynamics. The volatile nature of Renewable Energy Sources (RES) and dynamically varying loads, such as Electric Vehicles (EVs), further worsens the situation. The paper presents a novel grid dynamics indicator (GDI) based intelligent relay to avoid nuisance tripping in a grid-connected microgrid under varying grid dynamics. The dynamics indicator based hybrid detection scheme combines the Discrete Wavelet Transform (DWT) and Support Vector Machine (SVM) techniques. The relay uses a DWT-based features extraction process to fetch six significant features of one cycle of voltage and current. Comprehensive tests were conducted on the IEEE 9-bus system to verify the performance of the relay. The evaluation process involved Controller Hardware in Loop (CHIL) real-time experiments using the OPAL-RT and Raspberry Pi microcontroller, which provided satisfactory performance with a desired accuracy of 98.99<span><math><mtext>%</mtext></math></span>. A GDI-based solid state relay is developed and the experiment with the advanced relay in a working microgrid validates the reliability and effectiveness of GDI based relay logic for the grid-connected microgrid under varying dynamics.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"242 ","pages":"Article 111460"},"PeriodicalIF":3.3,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143131126","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

Robustness assessment of primal–dual gradient projection-based online feedback optimization for real-time distribution grid management

IF 3.3 3区工程技术

Electric Power Systems Research Pub Date : 2025-02-04 DOI: 10.1016/j.epsr.2025.111468

Sen Zhan , Johan Morren , Wouter van den Akker , Anne van der Molen , Nikolaos G. Paterakis , J.G. Slootweg

{"title":"Robustness assessment of primal–dual gradient projection-based online feedback optimization for real-time distribution grid management","authors":"Sen Zhan , Johan Morren , Wouter van den Akker , Anne van der Molen , Nikolaos G. Paterakis , J.G. Slootweg","doi":"10.1016/j.epsr.2025.111468","DOIUrl":"10.1016/j.epsr.2025.111468","url":null,"abstract":"<div><div>The increasing deployment of distributed energy resources causes voltage and congestion issues in distribution grids. Recently, online feedback optimization (OFO) emerges as a promising real-time solution approach. OFO uses measurements as feedback and employs optimization algorithms as feedback controllers to steer the distribution system towards optimal operating points. OFO does not need an accurate grid model nor consumption data of non-controllable loads and affords fast implementation, which make it particularly suitable for real-time distribution grid management. This paper aims to provide an extensive robustness assessment of OFO based on the primal–dual gradient projection (PDGP) algorithm under practical distribution grid operational conditions. To quantify system performance, we use metrics including active power curtailment ratio, voltage and loading constraint violations, normalized reference power tracking error, and distance to the deterministic-case trajectory. Simulations conducted on a 136-bus medium-voltage grid using second-scale data reveal that the algorithm demonstrates satisfactory robustness to time-varying generation and loads, grid model inaccuracy, measurement errors, and communication failures, but is susceptible to systematic communication delays and unnoticed topology changes particularly involving tripping of cables at the beginning of distribution feeders. Potential solutions to these shortcomings are discussed.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"242 ","pages":"Article 111468"},"PeriodicalIF":3.3,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143131128","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

Fault-induced current limitation control for grid-forming inverters: A framework for rapid grid code compliance

IF 3.3 3区工程技术

Electric Power Systems Research Pub Date : 2025-02-04 DOI: 10.1016/j.epsr.2025.111471

Arjita Pal , Pankaj Dilip Achlerkar , Bijaya Ketan Panigrahi

{"title":"Fault-induced current limitation control for grid-forming inverters: A framework for rapid grid code compliance","authors":"Arjita Pal , Pankaj Dilip Achlerkar , Bijaya Ketan Panigrahi","doi":"10.1016/j.epsr.2025.111471","DOIUrl":"10.1016/j.epsr.2025.111471","url":null,"abstract":"<div><div>This paper presents a current limitation scheme for a grid-forming inverter-based resource (IBR). The proposed controller allows the IBR to be integrated into distribution networks while ensuring rapid overcurrent protection and adherence to grid codes for low and medium-voltage grids. The method employs event-triggered time control logic that deactivates grid-forming inverter (GFMI)’s outer power control loop and uses the angle of the current reference as a variable to determine the current injection into the grid during faults. It also monitors the duration the IBR should endure a fault before deciding to trip. The performance of the proposed controller in limiting current is assessed through time-domain simulations after a 100% grid voltage sag. The controller demonstrates a significant improvement in the fault-ride-through (FRT) characteristics and post-fault synchronization dynamics of the GFMI. The study also explores and compares the proposed framework with existing strategies of virtual impedance (VI), current saturation (CS), and priority-based current saturation (PCS). The effectiveness of the proposed controller is also validated through experiments conducted on a power-hardware-in-the-loop (PHiL) test bench that explores the interactions between a physical GFMI and a simulated power grid under various critical operating scenarios like a severe symmetrical fault at the point of common coupling (PCC).</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"242 ","pages":"Article 111471"},"PeriodicalIF":3.3,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143131127","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