Electric Power Systems Research最新文献_第10页

A review on soft switched PFC boost converter for efficient lowering of switching losses

IF 3.3 3区工程技术

Electric Power Systems Research Pub Date : 2025-01-23 DOI: 10.1016/j.epsr.2025.111430

Irtiza Bashir , Abdul Hamid Bhat , Salman Ahmad

{"title":"A review on soft switched PFC boost converter for efficient lowering of switching losses","authors":"Irtiza Bashir , Abdul Hamid Bhat , Salman Ahmad","doi":"10.1016/j.epsr.2025.111430","DOIUrl":"10.1016/j.epsr.2025.111430","url":null,"abstract":"<div><div>The inefficient power factor (PF) of electrical loads can lead to high current consumption, straining the electricity distribution system. Correcting PF is crucial for minimizing electricity bills, reducing capacity charges, and monthly demand. Simultaneously, soft switching methods enhance the reliability and efficiency of Power Factor Correction (PFC) converters by minimizing switching losses, thereby improving power conversion effectiveness. Various PFC boost converters have been explored in existing works (2015–2023) to mitigate switching losses in diverse applications. This study aims to summarize these works, providing a comprehensive review of soft-switched PFC boost converters. It delves into theoretical aspects, including types of PFC methods, perspectives of soft-switching converters, and PFC boost converters with analog and digital circuits. The theoretical foundation aids in identifying significant drawbacks and understanding the complexities involved. The study employs tabular analysis to unveil the diverse converters used for switching loss reduction and assesses their prevalence in conventional works across different applications. In conclusion, the study identifies major issues during the analysis of conventional works and offers relevant suggestions. This comprehensive overview equips practitioners and researchers with insights into contemporary findings, guiding future research endeavors in the field of PFC boost converters and soft switching methods.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"242 ","pages":"Article 111430"},"PeriodicalIF":3.3,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143131195","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 interval-based model for stochastic optimal scheduling of multi carrier energy hubs in the presence of multiple sources of uncertainty

IF 3.3 3区工程技术

Electric Power Systems Research Pub Date : 2025-01-23 DOI: 10.1016/j.epsr.2025.111447

Armin Dolatnia , Pouya Sarvari , Behnam Karim Sarmadi , Alfred Baghramian

{"title":"An interval-based model for stochastic optimal scheduling of multi carrier energy hubs in the presence of multiple sources of uncertainty","authors":"Armin Dolatnia , Pouya Sarvari , Behnam Karim Sarmadi , Alfred Baghramian","doi":"10.1016/j.epsr.2025.111447","DOIUrl":"10.1016/j.epsr.2025.111447","url":null,"abstract":"<div><div>Multi-carrier energy hubs (MCEHs) are an innovative concept capable of meeting various types of energy demand simultaneously. MCEHs involve numerous components, many of which have varying degrees of uncertainty. Therefore, a detailed model is essential for managing the energy needs of MCEHs while addressing these uncertainties. This paper proposes a novel MCEH optimization model that incorporates renewable energy resources and addresses the uncertainty associated with an electric vehicle parking lot (EVPL), renewable energy generation, and multi-energy consumption, assessing their impacts on the operational cost of the hubs. The model considers three types of energy inputs: electrical power, gas, and water, corresponding to three types of demands met by various resources. Furthermore, the hubs are capable of trading electrical energy with each other and with the external grid. To reduce carbon emissions, hydrogen vehicles and EVs are utilized, enhancing the operational efficiency of the multi-hub system. This study models the uncertainty of EVPLs, renewable energy generation, and multi-energy consumption using a stochastic, scenario-based approach. An interval-based approach is employed to address the uncertainty of retail electricity prices. The numerical results demonstrate the effectiveness of the proposed multi-energy, multi-hub management strategy, achieving a 19.48 % reduction in operational costs. However, the mean overall operational cost increased by 2.54 %.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"242 ","pages":"Article 111447"},"PeriodicalIF":3.3,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143132319","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 predictor for areal blackout in power system under emergency state using measured data

IF 3.3 3区工程技术

Electric Power Systems Research Pub Date : 2025-01-23 DOI: 10.1016/j.epsr.2025.111410

Siavash Shadpey , Mohammad Reza Aghamohammadi , Alireza Sobbouhi , Enrico Zio

{"title":"A novel predictor for areal blackout in power system under emergency state using measured data","authors":"Siavash Shadpey , Mohammad Reza Aghamohammadi , Alireza Sobbouhi , Enrico Zio","doi":"10.1016/j.epsr.2025.111410","DOIUrl":"10.1016/j.epsr.2025.111410","url":null,"abstract":"<div><div>Power systems are always under the risk of various disturbances threating their stability and integrity with the potential for blackouts. Due to unforeseen contingencies, uncertain renewable resources and insufficient corrective measures, the pre-fault dynamic security assessment (DSA) methods cannot guarantee full security under alert operating state of power systems, and pulling to emergency state becomes inevitable. Furthermore, these methods provide a global view of the security of whole power systems. To address the limitations of DSA-based methods, this paper proposes an agile approach to prevent the propagation of blackouts in the power network, requiring a local identification strategy based on blackout areas. An online power system blackout predictor (PSBP) is designed to predict the amount of future potential blackouts (AFPB) under emergency conditions as a supplement to traditional DSA methods. This approach introduces a new paradigm for system vulnerability assessment. For each blackout area, the PSBP employs decision tree-based ensemble algorithms. By continuously tracking incremental changes in the dominant transient operating variables that reflect disturbances and system vulnerability, the PSBP can predict the potential for a blackout area to progress toward a full blackout. The vulnerability index, calculated based on incremental changes observed in the moving window of snapshots (MWS), is updated incrementally. This index serves as input to the PSBP to predict the likelihood of a blackout in each area. The method is demonstrated using the IEEE 39-bus test system, and the results highlight its potential as a valuable tool for assessing the future vulnerability of power systems based on historical behavior data.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"242 ","pages":"Article 111410"},"PeriodicalIF":3.3,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143131112","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

Enhanced primary protection scheme for MTDC network using modified linear quadratic score

IF 3.3 3区工程技术

Electric Power Systems Research Pub Date : 2025-01-23 DOI: 10.1016/j.epsr.2025.111418

Praveen Kumar Gupta, Subhransu Ranjan Samantaray

{"title":"Enhanced primary protection scheme for MTDC network using modified linear quadratic score","authors":"Praveen Kumar Gupta, Subhransu Ranjan Samantaray","doi":"10.1016/j.epsr.2025.111418","DOIUrl":"10.1016/j.epsr.2025.111418","url":null,"abstract":"<div><div>As MTDC network expands, identifying faults and developing reliable protection schemes is crucial. This paper presents a single-ended, fast and reliable primary protection scheme based on Linear Quadratic Score (LQS) for fault detection. The scheme requires only line current and leverages LQS to distinguish between sudden changes due to faults and gradual variations from load change. This feature allows for detection of faults ranging from a bolted fault to high-resistance fault (up to 800 Ω) on a 400 km long transmission line. Further, LQS is modified to enable the scheme to differentiate between internal and external faults. The scheme also incorporates Minimum Time Fault Detection (MTFD), preventing false tripping during disturbances. It operates effectively in noise environment (30 dB SNR), evaluated for different CLR size, and avoids mis operation during adjacent line breaker operations. Further, performance of proposed scheme is also validated on Real Time Digital Simulator (RTDS) environment. Results demonstrate that, proposed protection scheme is fast, sensitive, and selective under different faults and can be implemented on any network configuration.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"242 ","pages":"Article 111418"},"PeriodicalIF":3.3,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143131117","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

Microgrid and grid synchronization: A critical analysis of challenges and opportunities

IF 3.3 3区工程技术

Electric Power Systems Research Pub Date : 2025-01-23 DOI: 10.1016/j.epsr.2025.111434

Ila Rai , Suchetha C

{"title":"Microgrid and grid synchronization: A critical analysis of challenges and opportunities","authors":"Ila Rai , Suchetha C","doi":"10.1016/j.epsr.2025.111434","DOIUrl":"10.1016/j.epsr.2025.111434","url":null,"abstract":"<div><div>Microgrids provide a viable way to integrate renewable energy sources, enhance energy security, and boost grid resilience. However, substantial operational and technological challenges exist in achieving smooth synchronization with the larger power grid. The primary challenges associated with microgrids, and grid synchronization are examined extensively in this paper. These difficulties include phase and frequency coordination, problems with power quality, methods for islanding and reconnecting, infrastructure for communication and control, and regulatory barriers. The research examines new developments in smart grid technology, sophisticated control algorithms, and creative finance strategies that may enable more seamless synchronization and help microgrids reach their full potential. The research also proposes a method for managing energy while emphasizing the importance of implementing an effective energy management plan, particularly in energy storage systems. A method is suggested for managing energy storage and controlling energy storage system charge and discharge in a microgrid connected to a solar system, using linear programming optimization methods to minimize variable electricity prices and compare it with heuristic optimization approaches. In order to overcome the remaining obstacles and clear the path for the broad deployment of microgrids, the article ends with suggestions for future research and development projects.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"242 ","pages":"Article 111434"},"PeriodicalIF":3.3,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143131196","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

Hybrid algorithm for directly detecting and classification of multiple power quality disturbances

IF 3.3 3区工程技术

Electric Power Systems Research Pub Date : 2025-01-22 DOI: 10.1016/j.epsr.2025.111428

Cagri Altintasi

{"title":"Hybrid algorithm for directly detecting and classification of multiple power quality disturbances","authors":"Cagri Altintasi","doi":"10.1016/j.epsr.2025.111428","DOIUrl":"10.1016/j.epsr.2025.111428","url":null,"abstract":"<div><div>Detecting potential power quality (PQ) events that may occur in the network is an important issue to provide safe electricity to customers. In this study, a new hybrid algorithm named adaptive fitness distance balance hybrid artificial hummingbird algorithm-artificial rabbit optimization (AFDB-AHAARO) algorithm is introduced for the detection and classification of PQ events. A hybrid algorithm is developed to improve the early convergence of the AHA algorithm by expanding the search to avoid local minima. The proposed method, unlike the optimization algorithms used in the literature, is directly applied to the detection and classification of PQ events. The performance of the proposed algorithm is investigated by 6000 different single and multiple PQ events in the Matlab in noisy and noiseless environments, considering the IEEE-1159 standards. The obtained results are compared with the AHA algorithm and the methods proposed in the literature, and it is shown that the proposed method outperforms in noisy environments. It also provides information about the time interval of PQ events. The validity of the proposed algorithm in real systems is demonstrated by testing it on the voltage signal with flicker disturbance obtained from the electrical network and on experimentally generated sag and swell events.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"242 ","pages":"Article 111428"},"PeriodicalIF":3.3,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143131114","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

Evaluative approach of transmission line and substation insulation failure probability in climate changing

IF 3.3 3区工程技术

Electric Power Systems Research Pub Date : 2025-01-21 DOI: 10.1016/j.epsr.2025.111436

Hadi Norouzi

{"title":"Evaluative approach of transmission line and substation insulation failure probability in climate changing","authors":"Hadi Norouzi","doi":"10.1016/j.epsr.2025.111436","DOIUrl":"10.1016/j.epsr.2025.111436","url":null,"abstract":"<div><div>Due to many kinds of climate phenomena and changes, power transmission lines and substations have faced many events that cause some failures, outages and local blackouts which can have root in insulation behavior. Fine dust, as introduced recently, climate changing can effect on insulation equipment according to contamination probability function values and weather conditions that need to be evaluated in many situations, with and without climate changing, to obtain the new failure probability function based on area and zone contamination which is categorized initially. This paper at first presents failure mechanism for insulation and next, by using conceptual explanation, introduces a failure probability modeling to investigate the climate change effects on lines and substations. The movement acceleration (MA) index has been proposed with aim to be applied in preventively possess and any planning for decreasing the failure probability. The main concept of proposed MA index has been shown the trend of climate parameter changing which need to be inter as initial data in calculation and process for selection or design of an equipment in power system such as equivalent salt deposit density and any environmental specification. Based on the presented states that determine existence contamination levels of line routs and zones, the events and outages have been classified to determine the failure probability curves and showing the difference between pre-expected of insulation failures without climate changing. Khuzestan utility from Iran as an experimental case study has been investigated in this paper for realizing the hidden weather conditional effects and events.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"242 ","pages":"Article 111436"},"PeriodicalIF":3.3,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143132314","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 planning method of enhancing grid-connected flexibility for offshore wind power HVDC integration systems

IF 3.3 3区工程技术

Electric Power Systems Research Pub Date : 2025-01-21 DOI: 10.1016/j.epsr.2025.111431

Yang Liu , Jiahao Lin , Ruanming Huang

{"title":"A novel planning method of enhancing grid-connected flexibility for offshore wind power HVDC integration systems","authors":"Yang Liu , Jiahao Lin , Ruanming Huang","doi":"10.1016/j.epsr.2025.111431","DOIUrl":"10.1016/j.epsr.2025.111431","url":null,"abstract":"<div><div>With the successive proposal of carbon reduction goals in various countries, offshore wind power has gradually become one of the important forms of energy in some countries. The contradiction between the consumption of large-scale offshore wind power and the shortage of flexibility resources of the receiving-end grid has become increasingly prominent. It is urgent to improve the flexibility of large-scale offshore wind power. Based on the advantages of VSC<img>HVDC in the long-distance transmission of offshore wind power, this paper proposes a planning method for VSC-MTDC systems of offshore wind power integration considering flexible operation characteristics. A flexibility model of VSC-MTDC systems for offshore wind power integration is built. Incorporating the flexible operation requirements of offshore wind power integration into the planning of electrical systems, a bilevel optimization model is proposed. The upper layer plans the electrical system under steady-state scenarios, and the lower layer performs the operation verification under wind speed fluctuation scenarios. The case study based on MATLAB R2020a shows that the proposed method can provide flexible and adjustable wind power for the onshore grid as much as possible while saving investment costs, which can provide a reference for the engineering design of offshore wind power integration systems based on MTDC.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"242 ","pages":"Article 111431"},"PeriodicalIF":3.3,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143132318","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

Transient and steady currents in a parallel RL circuit

IF 3.3 3区工程技术

Electric Power Systems Research Pub Date : 2025-01-21 DOI: 10.1016/j.epsr.2025.111420

Oldřich Coufal

{"title":"Transient and steady currents in a parallel RL circuit","authors":"Oldřich Coufal","doi":"10.1016/j.epsr.2025.111420","DOIUrl":"10.1016/j.epsr.2025.111420","url":null,"abstract":"<div><div>Part of electrical engineering is circuit theory, which includes methods for calculating steady and transient currents in a parallel RL circuit. Power systems are typically inductive and can be modelled with RL circuits. The proposed methods can be used in the calculation of short-circuit currents and in the calculation of current density in solid conductors that form transmission lines. An RL circuit is formed by real voltage sources, inductors and resistors. The inductance and resistance of the circuit elements do not depend on time. The ideal voltage source, which is part of the real source, has voltage depending on time. Currents in a parallel RL circuit are solutions to ordinary differential and algebraic equations, which are mathematical expressions of Kirchhoff’s laws. The original contribution of this paper is the derivation of equations for the calculation of currents in a circuit for all possible combinations of circuit elements. The importance of the initial conditions of currents whose first derivative occurs in the equations is emphasized. An original definition of steady current and transient current is proposed. The theory is supplemented with solutions of illustrative examples.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"242 ","pages":"Article 111420"},"PeriodicalIF":3.3,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143132316","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 location technique for multi-terminal DC-microgrid based Gaussian process regression

IF 3.3 3区工程技术

Electric Power Systems Research Pub Date : 2025-01-21 DOI: 10.1016/j.epsr.2025.111414

Mohamed Elmadawy , Abdelhady Ghanem , Fujin Deng , Sayed Abulanwar , Ahmed Shahin

{"title":"Fault location technique for multi-terminal DC-microgrid based Gaussian process regression","authors":"Mohamed Elmadawy , Abdelhady Ghanem , Fujin Deng , Sayed Abulanwar , Ahmed Shahin","doi":"10.1016/j.epsr.2025.111414","DOIUrl":"10.1016/j.epsr.2025.111414","url":null,"abstract":"<div><div>This study presents an effective fault location technique for a multiterminal DC microgrid. Zonal fault detection is first completed by intelligent protection devices that capture voltages and currents, and then the resistance at both cable terminals is estimated. The polarities of the estimated front-end and remote-end resistances are compared by their respective intelligent protection devices to examine the fault. If both polarities are negative, a cable fault has occurred. If the voltages across two small inductors inserted around each junction have opposite polarities, a junction fault is identified. After identifying the faulted line, the proposed Gaussian process regression model is used to determine the fault distance based on one-sided data. The proposed algorithm shows considerable enhancements in terms of detection accuracy and time response. Besides, this technique can successfully identify a range of fault scenarios, such as close-in, mid-point, and remote faults, even amidst noise and under different operational conditions regardless of fault resistance. Furthermore, the method is capable of determining fault distance within 2 ms, achieving an error margin of less than 1%. Extensive simulations and experimental investigations reveal the effectiveness and high accuracy of the proposed approach in detecting and locating various faults under a wide range of fault resistances.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"242 ","pages":"Article 111414"},"PeriodicalIF":3.3,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143132317","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