IEEE Transactions on Power Delivery最新文献_第9页

A Mixed-Integer Nonlinear Model to Support the Operation of Distribution Systems With Hidden DERs 支持带有隐藏 DER 的配电系统运行的混合指数非线性模型

IF 3.8 2区工程技术

IEEE Transactions on Power Delivery Pub Date : 2024-11-25 DOI: 10.1109/TPWRD.2024.3505843

Pedro N. Vasconcelos;Fernanda C. L. Trindade;Bala Venkatesh;Walmir Freitas;Antonio C. Zambroni de Souza;Glauco N. Taranto

{"title":"A Mixed-Integer Nonlinear Model to Support the Operation of Distribution Systems With Hidden DERs","authors":"Pedro N. Vasconcelos;Fernanda C. L. Trindade;Bala Venkatesh;Walmir Freitas;Antonio C. Zambroni de Souza;Glauco N. Taranto","doi":"10.1109/TPWRD.2024.3505843","DOIUrl":"10.1109/TPWRD.2024.3505843","url":null,"abstract":"With impending deep electrification powered by innumerable Distributed Energy Resources (DERs), modeling each DER individually is becoming a critical challenge to the Distribution System Operators (DSOs). Even though the DSOs know the total DER installed capacity at the feeder level, the exact individual type, location, and size of such generators may remain unknown. This paper proposes a mixed-integer nonlinear programming formulation to support the operation of distribution systems under massive DER integration. The proposal accurately estimates distribution system power flows, relying on a limited set of measurements. It aims to establish equivalent DER models representing hidden resources and improve the representation of limited-visibility networks. The only DER information required is the total solar and wind installed capacity at the feeder level. The performance is assessed by comparing estimated and measured values of bus voltage magnitudes and branch power flows. Results demonstrate the efficacy of the proposed formulation in accurately replicating measurements, achieving an accuracy of over 90% when estimating active power flows in unmetered branches.","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"40 1","pages":"484-496"},"PeriodicalIF":3.8,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142712537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Virtual Shaft Control of Virtual Synchronous Generator With Nonlinear Stiffness for Power Oscillation Suppression 具有非线性刚度的虚拟同步发电机虚拟轴控制用于抑制功率振荡

IF 3.8 2区工程技术

IEEE Transactions on Power Delivery Pub Date : 2024-11-25 DOI: 10.1109/TPWRD.2024.3505934

Xiangyu Zhang;Huazhi Liu;Yabo Cao;Yuan Fu;Yongxuan Huang;Yonggang Li

{"title":"Virtual Shaft Control of Virtual Synchronous Generator With Nonlinear Stiffness for Power Oscillation Suppression","authors":"Xiangyu Zhang;Huazhi Liu;Yabo Cao;Yuan Fu;Yongxuan Huang;Yonggang Li","doi":"10.1109/TPWRD.2024.3505934","DOIUrl":"10.1109/TPWRD.2024.3505934","url":null,"abstract":"Efficient power oscillation suppression in broad bandwidth and reduction of self-induced resonance risk are critical for the wide application of the virtual synchronous generator (VSG) in power systems with a high penetration of wind power generation. In this paper, the linear virtual shaft coupling relationship between the VSG emulated by the doubly fed induction generator (DFIG)-based wind turbine and synchronous generator (SG) is analyzed firstly. The two degrees of freedom model of the power system with the VSG is then established under the application of the virtual shaft to connect the generators. A novel virtual shaft with cubic stiffness is then introduced to the reduce the self-induced resonance risk of the VSGs. Using the optimal bandwidth theory, the oscillation suppression bandwidth of the VSG with the nonlinear virtual shaft are extended. To further improve the power support functions of the VSGs, a novel nonlinear virtual shaft control adapted to the DFIG-based wind turbine is proposed, and the design parameters are optimized. Finally, a typical 9-nodes power system with a high wind penetration of 32% is simulated on a controller hardware-in-the-loop platform. The test results demonstrate that the nonlinear virtual shaft reduces the risk of resonances by extending the oscillation suppression bandwidth of the VSG, thus improving the power support ability of wind turbines for system frequency regulation and power oscillation suppression.","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"40 1","pages":"497-508"},"PeriodicalIF":3.8,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142712538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Lifetime Improvement of Liquid-Immersed Power Transformers Based on Novel Nanofluids and Water Scavenger 基于新型纳米流体和水清除剂的液浸式电力变压器寿命改善技术

IF 3.8 2区工程技术

IEEE Transactions on Power Delivery Pub Date : 2024-11-25 DOI: 10.1109/TPWRD.2024.3502638

Reza Ilka;JiangBiao He;Jingjing Yang;Jose E. Contreras;Carlos G. Cavazos

{"title":"Lifetime Improvement of Liquid-Immersed Power Transformers Based on Novel Nanofluids and Water Scavenger","authors":"Reza Ilka;JiangBiao He;Jingjing Yang;Jose E. Contreras;Carlos G. Cavazos","doi":"10.1109/TPWRD.2024.3502638","DOIUrl":"10.1109/TPWRD.2024.3502638","url":null,"abstract":"Liquid-immersed power transformers are an integral part of the electrical grid. Long and reliable service life is of crucial importance in the design and operation of these power apparatuses. Transformer lifetime is mainly determined by the winding insulation system, which ages faster at high temperature. Nanofluid is a new type of oil with enhanced thermal and dielectric properties. Adding nano particles to the cooling oil increases its thermal conductivity, leading to more effective thermal conduction of the transformer. Therefore, hotspot temperature in the transformer windings decreases and hence the lifetime of the transformer is improved. On the other hand, utilization of nanofluids enhances the withstanding capability of the insulation material by scavenging the moisture in the transformer oil. In this paper, various laboratory oil samples will be introduced to serve as the next-generation transformer coolant. In order to understand and verify the behavior of the newly developed oils, finite element analysis and finite volume methods are used for the multi-physics simulations. A comparative study and experimental validation are conducted to show the superiority of nanofluid with respect to the state of the art mineral oil in terms of hotspot temperature and dielectric insulation strength which lead to lifetime improvement.","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"40 1","pages":"434-446"},"PeriodicalIF":3.8,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142712547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 Graphical Tool to Examine the Coordination Details of Directional Overcurrent Protections as a Function of Fault Location 根据故障位置检查定向过流保护器协调细节的图形工具

IF 3.8 2区工程技术

IEEE Transactions on Power Delivery Pub Date : 2024-11-21 DOI: 10.1109/TPWRD.2024.3504133

Paulo M. De Oliveira-De Jesus;Elmer Sorrentino

引用次数: 0

IEEE Power & Energy Society Information IEEE 电力与能源学会信息

IF 3.8 2区工程技术

IEEE Transactions on Power Delivery Pub Date : 2024-11-21 DOI: 10.1109/TPWRD.2024.3490097

引用次数: 0

On Analytical Estimation of Inductances in Equivalent Ladder Network Model of a Homogeneous Transformer Winding Using FRA Data 论利用 FRA 数据分析估计同质变压器绕组等效梯形网络模型中的电感值

IF 3.8 2区工程技术

IEEE Transactions on Power Delivery Pub Date : 2024-11-21 DOI: 10.1109/TPWRD.2024.3504961

Tirlingi Madhava Rao;Saurav Pramanik;Sourav Mitra

{"title":"On Analytical Estimation of Inductances in Equivalent Ladder Network Model of a Homogeneous Transformer Winding Using FRA Data","authors":"Tirlingi Madhava Rao;Saurav Pramanik;Sourav Mitra","doi":"10.1109/TPWRD.2024.3504961","DOIUrl":"10.1109/TPWRD.2024.3504961","url":null,"abstract":"The determination of ladder-network model parameters for transformer winding holds paramount significance in validating the design constraints of the transformer winding, with a particular emphasis on facilitating thorough analysis of its impulse behaviour. As these parameters cannot be measured directly, the majority of studies documented in the literature rely on iterative optimization techniques for estimation, and as of now, no analytical solution has been reported and implemented. To address this concern, this paper introduces an analytical approach for estimating unknown self and mutual inductances in equivalent ladder-network model of a homogeneous transformer winding, employing frequency response measurement. For this purpose, the method derived necessary linear and non-linear equations of unknown inductances pertaining to the coupled ladder-network model of the winding. The solution is directly obtained utilizing essential peak and trough frequencies extracted from three measured admittance magnitude responses along with series and ground capacitances determined separately. The practicality of the method has been verified using experimental results on three different transformer windings including one with iron-core. For improved precision, the estimated inductance values were fine-tuned further using conventional optimization technique. Results indeed demonstrate the practicality as well as efficacy of the method.","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"40 1","pages":"472-483"},"PeriodicalIF":3.8,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142684344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

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IF 3.8 2区工程技术

IEEE Transactions on Power Delivery Pub Date : 2024-11-21 DOI: 10.1109/TPWRD.2024.3490101

引用次数: 0

Optimal Co-Planning of Multi-Port Soft Open Points and Energy Storage Systems for Improving Hosting Capacity and Operation Efficiency in Distribution Networks 优化多端口软开放点和储能系统的协同规划，提高配电网络的托管能力和运行效率

IF 3.8 2区工程技术

IEEE Transactions on Power Delivery Pub Date : 2024-11-21 DOI: 10.1109/TPWRD.2024.3503662

Hanbin Diao;Peiqiang Li;Chunming Tu;Liang Che

{"title":"Optimal Co-Planning of Multi-Port Soft Open Points and Energy Storage Systems for Improving Hosting Capacity and Operation Efficiency in Distribution Networks","authors":"Hanbin Diao;Peiqiang Li;Chunming Tu;Liang Che","doi":"10.1109/TPWRD.2024.3503662","DOIUrl":"10.1109/TPWRD.2024.3503662","url":null,"abstract":"Soft open points (SOPs) and energy storage systems (ESSs) are seen as promising options to improve hosting capacity (HC) for renewable energy sources and the operation efficiency of distribution networks. However, there is a need for proper co-planning of multi-port SOPs (MSOPs) and ESSs to better exploit their spatial and temporal flexibility. Thus, this paper proposes a co-planning method to determine the locations, capacities, and integration forms of MSOPs and ESSs that can achieve optimal cooperative benefits in terms of HC and operation efficiency while guaranteeing cost-effective investments. A two-layer stochastic programming model is formulated with a cooperative benefits metric combining the degree of branch current's temporal even distribution and network loss sensitivity. To regulate the cost-effectiveness level, the profit constraint that accounts for stochastic electricity prices is developed in the two-layer model. Moreover, a convex MSOP-ES model, based on Kirchhoff's law and current polynomials, is embedded in the two-layer model, enabling multiple integration of MSOPs and ESSs. Then, a customized decomposition algorithm and a sequential strategy of siting and sizing solve this two-layer programming problem. Case studies on the IEEE 33-bus distribution network and a real distribution network are executed to validate the effectiveness of the proposed method.","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"40 1","pages":"459-471"},"PeriodicalIF":3.8,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142684345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

IEEE Transactions on Power Delivery Information for Authors IEEE Transactions on Power Delivery 给作者的信息

IF 3.8 2区工程技术

IEEE Transactions on Power Delivery Pub Date : 2024-11-21 DOI: 10.1109/TPWRD.2024.3490099

引用次数: 0

Design Scheme and Experimental Research on the Main Insulation Structure of 126 kV OIP Bushing Based on a New-Type Aramid Insulation Paper 基于新型芳纶绝缘纸的 126 kV OIP 套管主绝缘结构设计方案与试验研究

IF 3.8 2区工程技术

IEEE Transactions on Power Delivery Pub Date : 2024-11-19 DOI: 10.1109/TPWRD.2024.3502410

Hanwen Bi;Xiaozhou Fan;Hai Xiao;He Dong;Fangcheng Lv

{"title":"Design Scheme and Experimental Research on the Main Insulation Structure of 126 kV OIP Bushing Based on a New-Type Aramid Insulation Paper","authors":"Hanwen Bi;Xiaozhou Fan;Hai Xiao;He Dong;Fangcheng Lv","doi":"10.1109/TPWRD.2024.3502410","DOIUrl":"10.1109/TPWRD.2024.3502410","url":null,"abstract":"Aramid paper with higher heat resistance grade is considered to be an ideal material for the internal insulation in oil-impregnated-paper (OIP) bushing in order to improve its electrical, thermal and mechanical performance. However, due to the significant differences in dielectric and mechanical properties between aramid and cellulose paper, specified design for main insulation structure should be put forward. This paper took the aramid-based 126 kV OIP bushing as an example, and for the first time combined equal-capacitor and equal-margin method to propose a quantitative internal insulation structure design scheme. Compared with conventional bushings at the same voltage level, the capacitor core volume and screen number has been respectively reduced by 50% and 7 layers. Then, the internal electric field distribution of conventional and aramid-based bushing was compared using COMSOL simulation, with the highest value increased by 36.4%. Finally, a prototype 126 kV aramid-based OIP bushing was produced according to the design scheme proposed, and type tests were carried out. Results showed that partial discharge and dielectric loss were respectively 5.03 pC and 0.483%, meeting the requirements of national standard, which proves the feasibility and superiority of the aramid-based insulation system, providing a research foundation and data support for its further engineering application.","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"40 1","pages":"423-433"},"PeriodicalIF":3.8,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142673489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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