Electric Power Systems Research最新文献

{"title":"Maximizing the active power flow controllability in a distribution system with optimum SOP placement","authors":"Mustafa Erdem Sezgin ,&nbsp;Ayşenur Uzunalioğlu ,&nbsp;Umur Deveci ,&nbsp;Murat Göl","doi":"10.1016/j.epsr.2025.111550","DOIUrl":"10.1016/j.epsr.2025.111550","url":null,"abstract":"<div><div>The classical distribution system has recently begun evolving with the introduction of new assets, such as distributed energy resources and electric vehicles. Although these technologies help nations reduce their greenhouse gas emissions, their adoption at the distribution level presents challenges for system operators. For example, distributed generation can raise network voltage, and uneven electric vehicle use across neighborhoods can lead to feeder imbalance. Soft open points (SOPs) offer a potential solution to these issues without compromising radial operation. However, given their high investment costs, determining their optimal placement in the network is crucial. This paper proposes a linearized approach for optimal SOP placement, designed to maximize network controllability by analyzing the distribution system’s behavior and solving the problem using mixed-integer linear programming. The proposed approach can be applied to ring-designed but radial-operated systems by considering various open branches. The strategy is tested on both the IEEE 33-bus test system and the METU distribution system. Using this approach, optimal SOP locations can be determined for all possible radial operation scenarios in a ring-designed system.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"244 ","pages":"Article 111550"},"PeriodicalIF":3.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526647","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}

{"title":"Ultra-short-term wind farm cluster interval power prediction based on cluster division and MQ-WaveNet-MSA","authors":"Chao Wang ,&nbsp;Hong Lin ,&nbsp;Ming Yang ,&nbsp;Li Chen","doi":"10.1016/j.epsr.2025.111557","DOIUrl":"10.1016/j.epsr.2025.111557","url":null,"abstract":"<div><div>The grid integration of large-scale wind farms has posed challenges to the safety and stability of power systems. To address these challenges, this study proposes a clustering-based direct multi-step interval prediction method for wind farm clusters to quantify the uncertainty in regional wind power generation. In the proposed method, the empirical orthogonal function is combined with the K-means algorithm to divide a wind farm cluster. In addition, the training, validation, and test sets are constructed for each sub-cluster based on the division results. Further, by combining the long-term perception advantages of the multi-horizon quantile-WaveNet (MQ-WaveNet) model and the global information enhancement capability of the multi-head self-attention (MSA) mechanism, the MQ-WaveNet-MSA model is developed to predict an ultra-short-term interval of a wind farm cluster to realize the direct multi-step prediction of multiple quantiles. Finally, twelve wind farms in the Xinjiang area are selected for a case study. The results show that the proposed model has higher interval prediction accuracy than the existing prediction models, which verifies its effectiveness.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"244 ","pages":"Article 111557"},"PeriodicalIF":3.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519457","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}

{"title":"Multi-purpose control of bidirectional converters for power management in hybrid microgrids considering electric vehicles","authors":"Amir Eisapour-Moarref ,&nbsp;Hossein Sakhaei ,&nbsp;Mahyar Zarghami ,&nbsp;Atousa Yazdani","doi":"10.1016/j.epsr.2025.111563","DOIUrl":"10.1016/j.epsr.2025.111563","url":null,"abstract":"<div><div>Hybrid microgrids (HMGs) are impacted by a wide range of operational issues, which can lead to technical challenges for these systems. Power management and power sharing accuracy remain two major concerns due to lack of appropriate control strategies for bidirectional DC-DC converters (BDCs), which transfer power between distributed generations (DGs), such as electric vehicles (EVs), and HMGs. Similarly, interlinking converters (ICs), which are essential for power exchange between the AC and DC sides, can further intensify this challenge. Such deficiencies can pose threats to efficient operation of HMGs. To address these issues, this paper proposes a 3-D droop-based control scheme for BDCs, designed to coordinate the performance of both EVs and BDCs on the DC side. This approach ensures accurate power sharing between BDCs despite unequal line resistances and enhances the overall power management of the HMG by involving EVs in meeting the load demand. Additionally, a novel approach for decoupling the charging and discharging modes of the EVs is introduced to eliminate circulating power among parallel BDCs. Consequently, BDC losses will be minimized, and their operational capacity remains unburdened, as unnecessary performance is avoided. Furthermore, a multi-purpose IC, formed by integrating a conventional single-stage IC with an adjustable distribution static synchronous compensator (DSTATCOM), equipped with a coordinated 3-D droop control is suggested. This not only facilitates the AC side voltage regulation (VR) through optimal reactive power compensation, but also ensures accurate reactive power sharing among parallel ICs. To accomplish this, the capacitance of the DC-link of the DSTATCOM is optimized by precisely tuning the proposed 3-D droop gains of the IC. The effectiveness of this control strategy is demonstrated and compared with other methods in the literature using an HMG testbed.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"244 ","pages":"Article 111563"},"PeriodicalIF":3.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526646","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}

{"title":"Designing vehicle-to-grid (V2G) aggregator fleet capacity for power grid reliability against cyberattacks","authors":"Hamid R. Sayarshad","doi":"10.1016/j.epsr.2025.111554","DOIUrl":"10.1016/j.epsr.2025.111554","url":null,"abstract":"<div><div>This study introduces an integrated model that examines the interactions between power systems, the potential impacts of cyberattacks, and the role of electric vehicles (EVs) in regulation-up markets. The model determines the optimal EV fleet size for vehicle-to-grid (V2G) services during disaster scenarios, improving grid flexibility and providing ancillary services. It enables V2G aggregators to balance fleet availability with grid demands, ensuring efficient allocation of energy resources during crises. The study also explores monitoring the state of charge (SOC) to maintain sufficient battery levels for users’ trips. The study quantifies the total cost of using EVs for frequency regulation, accounting for electricity and battery degradation costs. In addition, it optimizes power flow within the network, which is vital for power utilities to maintain system reliability under adverse conditions. A proactive network interdiction strategy is incorporated to mitigate cyberattacks on the power network. The combined impact of generator losses and infected nodes on critical infrastructure is also analyzed. The effectiveness of the model is benchmarked through four case studies. It successfully eliminated load shedding while tackling operational and cybersecurity challenges. Under the proposed model, the total vehicle count has decreased by up to 14.7% compared to the other cases.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"244 ","pages":"Article 111554"},"PeriodicalIF":3.3,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143511534","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}

{"title":"Application of fixed and mobile battery energy storage flexibilities in robust operation of two-way active distribution network","authors":"Min Zhu ,&nbsp;Rassol Hamed Rasheed ,&nbsp;Emad jassim kassed albahadly ,&nbsp;Jingyu Zhang ,&nbsp;Fayez Alqahtani ,&nbsp;Amr Tolba ,&nbsp;Kai Jin","doi":"10.1016/j.epsr.2025.111556","DOIUrl":"10.1016/j.epsr.2025.111556","url":null,"abstract":"<div><div>The use of flexibilities in the electricity distribution network is aimed at achieving more optimal operation of this network. One of the methods of using flexibility is using energy storage systems. In the operation of the distribution network with variable tariff, energy storage systems create flexibility in the network by charging in off-peak hours and discharging in peak hours. Batteries, which are the most widely used storage systems in the electricity distribution network for the operation of this network, are divided into two categories: fixed and mobile batteries. In fixed batteries, the installation location of the battery is already known, but in mobile batteries, the battery is transported on a truck and its location changes according to the operation, which is spatial-temporal flexibility of mobile batteries, and their location is determined according to the parking lots created to stop the truck. In this paper, the formulation of two-way distribution network operation in the presence of fixed and mobile batteries is presented. In the presented formulation, firstly, the model of fixed and mobile batteries is presented, and then it is aggregated in the problem of operation of two-way distribution network. The spatial-temporal flexibility of a mobile battery is a feature that allows for various applications. Unlike a fixed battery that only has temporal flexibility, in a mobile battery both temporal and spatial flexibility exist and are formulated. In the presented model, the robust optimization method is used to model the uncertainties of the problem. Finally, simulations on the IEEE 33-bus network have been presented to prove the capability of the presented model and the flexibility used. Considering 4 general states without fixed and mobile batteries, despite the fixed battery, despite the mobile battery and despite simultaneous both types of fixed and mobile batteries, in 3 cases, feeding from bus 1, feeding from bus 33 and feeding from both sides, the indices of the objective function value of the problem, the apparent power peak of the network and the active power losses have been investigated, which shows the effectiveness of using the flexibility mentioned in this paper. The value of the objective function, active power losses, and the apparent power peak of the network by using both types of storage devices in the network from both sides of supply has been reduced by 12, 70, and 13 percent, respectively, compared to the case where none of the storage devices were used.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"244 ","pages":"Article 111556"},"PeriodicalIF":3.3,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143511407","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}

{"title":"Evaluation of battery energy storage system to provide virtual transmission service","authors":"Qiushi Wang,&nbsp;Xingpeng Li","doi":"10.1016/j.epsr.2025.111570","DOIUrl":"10.1016/j.epsr.2025.111570","url":null,"abstract":"<div><div>An immediate need in the transmission system is to find alternative solutions that improve system operation and defer the need for new transmission lines. This study comprehensively evaluates the performance and economic benefits of short-term operation of using battery energy storage systems (BESS) as virtual transmission (VT) to promote power transfer across distant regions. Specifically, this work implements various day-ahead energy scheduling models to analyze the impact of VT on system operation cost, network congestion, model computational time, and market performance. The performance of VT is compared with three alternative network congestion mitigation methods, including building new high-voltage physical transmission lines, cost-driven battery energy storage systems, and network reconfiguration, as well as combinations of two of the aforementioned methods. The benchmark day-ahead scheduling model is a traditional security-constrained unit commitment model without system upgrades or other network congestion mitigation. Numerical simulations conducted on the IEEE 24-bus system demonstrate that VT provides a 14 % operational cost reduction and 34 % congested line relief compared to the base case. Compared to other examined schemes, VT is the only one comparable to physical transmission lines that can provide satisfying congestion relief and operation cost reduction without significantly sacrificing computing time and load payment.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"244 ","pages":"Article 111570"},"PeriodicalIF":3.3,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143511533","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}

{"title":"Assessment method of new energy hosting capacity in distribution grid considering rotary power flow controllers and demand response","authors":"Junqing Jia ,&nbsp;Tianyu Wu ,&nbsp;Jia Zhou ,&nbsp;Wenchao Cai","doi":"10.1016/j.epsr.2025.111566","DOIUrl":"10.1016/j.epsr.2025.111566","url":null,"abstract":"<div><div>In response to the imbalance of energy in the spatiotemporal dimension caused by the high penetration of new energy, a method for evaluating the hosting capacity of distributed new energy (DNE) is proposed, which takes into account the rotary power flow controllers (RPFC) and demand response (DR). Firstly, models for the RPFC and DR are developed. Then, a two-layer optimization model for the hosting capacity of DNE is established. In this model, the upper layer aims to maximize the hosting capacity by optimizing the integration capacity of new energy, while the lower layer aims to minimize the system's overall operating costs by adjusting the output of various devices. A hybrid optimization algorithm based on grey wolf optimization (GWO) and second-order cone optimization is used to solve the model. Finally, the IEEE 33-node system is used as a simulation case to analyze and validate the model under different scenarios. The results indicate that the maximum hosting capacity for renewable energy reaches 2812.2 kW in Scenario 4, an increase of 13.87 % compared to Scenario 1. Moreover, the total operational cost is the lowest among all scenarios, demonstrating that the optimization strategy can significantly enhance the hosting capacity and effectively reduce operational costs.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"244 ","pages":"Article 111566"},"PeriodicalIF":3.3,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143509637","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}

{"title":"A calculation method of impedance matrix for three-core submarine cables based on measurement of sequence impedance and mutual impedance parameters in multi-conductor loop","authors":"Wenxia Pan,&nbsp;Dapeng Zhang","doi":"10.1016/j.epsr.2025.111543","DOIUrl":"10.1016/j.epsr.2025.111543","url":null,"abstract":"<div><div>The three-core submarine cables have been widely used in offshore wind farm engineering as an important power transmission channel. The conventional methods for calculating the impedance matrix of submarine cables exhibits deviation between the computed and actual results. This is primarily due to their failure to fully consider the structural characteristics, specialized electromagnetic materials, and variations in burial depth of the cables. These limitations impact the accuracy of electrical characteristic calculations for submarine cables. To address factors affecting the accuracy of the impedance matrix calculations, this paper analyzes the relationship between measured sequence impedance of each metal layer and impedance matrix in three-core submarine cables. It derives equations to obtain the impedance matrix from sequence impedance. In addition, measurement methods for the sequence impedance and mutual impedance of each metal layer are provided to solve the equations. The impedance matrix of a 220 kV three-core submarine cable was calculated using the equations and the proposed measurement methods. The calculated impedance matrix is compared and analyzed against that obtained through finite element method. The results indicate that the proposed calculation and measurement approach is more effective, feasible, and with higher accuracy for the impedance matrix of laid three-core submarine cables.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"244 ","pages":"Article 111543"},"PeriodicalIF":3.3,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143509638","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}

{"title":"A distributed dispatch approach for district-level electric-heat-gas integrated energy systems considering carbon emission and green certificate trading","authors":"Jun Yang ,&nbsp;Lincheng Lei ,&nbsp;Dongyu Liu ,&nbsp;Wenyue Luo","doi":"10.1016/j.epsr.2025.111541","DOIUrl":"10.1016/j.epsr.2025.111541","url":null,"abstract":"<div><div>With a particular focus on enhancing energy consumption efficiency and addressing the challenge of low-carbon energy supply, this paper proposes a distributed dispatch approach for a district-level electric-heat-gas integrated energy system, incorporating an integrated mechanism for trading carbon credits and green certificates. A hierarchical dispatch framework is constructed, dividing the system into distribution networks and multi-energy microgrids, which addresses the limitations of existing centralized approaches by ensuring privacy and autonomy for different operators. On the distribution network side, a stepped carbon emission trading is considered, prioritizing both economic feasibility and carbon neutrality. On the side of multi-energy micro-networks, both carbon and green certificate trading are considered. Each micro-network adjusts its own dispatch approach to achieve maximum benefits. Then, through carbon quotas and renewable energy quotas, the low-carbon objective is converted into the system cost, which becomes part of the total cost. Finally, the interaction power at the interface connecting the upper and lower tiers serves as the coupling variable, which is decoupled and solved by the analysis target cascade. The dispatch approach is verified through simulations on an integrated heating and cooling network based on the IEEE 33-node distribution grid and 20-bus natural gas grid, demonstrating its effectiveness in achieving both economic and low-carbon objectives.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"244 ","pages":"Article 111541"},"PeriodicalIF":3.3,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143509640","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}

{"title":"The influence of Shield Wires on GIC simulations for realistic power grids","authors":"Rute Rodrigues Santos ,&nbsp;Maria Alexandra Pais ,&nbsp;João M.R. Cardoso ,&nbsp;Joana Alves Ribeiro ,&nbsp;Fernando J.G. Pinheiro","doi":"10.1016/j.epsr.2025.111540","DOIUrl":"10.1016/j.epsr.2025.111540","url":null,"abstract":"<div><div>Geomagnetically Induced Currents (GICs) can potentially disrupt power transmission systems causing power outages during geomagnetic storms. This study investigates the influence of Shield Wires (ShW) on GIC simulations in a real power grid, considering both resistive and current source additional contributions introduced into the electric circuit model. Using the modified Lehtinen–Pirjola method, we incorporate ShW in the network circuit model. Results from simulations for the Portuguese mainland network, assuming a uniform induced field, cannot be explained in the light of the single-line analytical model. Our results indicate that including ShW in GIC calculations for the power grid in this study leads to an overall reduction of GICs in substation grounding resistors by about 24%, an increase in transformer windings by about 11% and a slight increase in power lines of about 2.5%.</div></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":"244 ","pages":"Article 111540"},"PeriodicalIF":3.3,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143509639","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}