IEEE Transactions on Power Delivery最新文献_第7页

Earth Fault Detection Method for TN-C Systems Based on Comparison of Current Deviations 基于电流偏差比较的 TN-C 系统接地故障检测方法

IF 3.8 2区工程技术

IEEE Transactions on Power Delivery Pub Date : 2025-02-13 DOI: 10.1109/TPWRD.2025.3541201

Zhongyu Sun;Bingyin Xu;Wei Wang;Tony Yip

{"title":"Earth Fault Detection Method for TN-C Systems Based on Comparison of Current Deviations","authors":"Zhongyu Sun;Bingyin Xu;Wei Wang;Tony Yip","doi":"10.1109/TPWRD.2025.3541201","DOIUrl":"10.1109/TPWRD.2025.3541201","url":null,"abstract":"The existing low voltage (LV) earth fault detection techniques using residual current measurements cannot be effectively applied to the multi-earthed TN-C system. When an earth fault occurs on the multi-earthed TN-C system, the fault current passes through the combined protective and neutral (PEN) conductor back to the source, resulting in a low residual current. However, unbalanced load switching also generates residual current through the same path back to the source, thus making fault discrimination very difficult. To address this problem, the four-wire multi-earthed TN-C system was analyzed by decoupling the mode 0 and the mode N of the equivalent circuit so that the current characteristics can be clearly studied. A new earth fault detection method is developed which compares the residual current deviation with the PEN conductor current deviation. The scheme uses amplitude ratio and phase angle difference between these two measurements to discriminate between earth faults and unbalanced load switching. The feasibility of the proposed method was verified by digital simulation and by physical tests in an actual LV distribution network. Compared to approaches based only on residual current, the proposed method demonstrates better sensitivity and reliability.","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"40 2","pages":"1191-1202"},"PeriodicalIF":3.8,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143417169","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

Influence of Control and Limiter Schemes on Sequence-Domain Fault Models of Grid-Forming Inverter-Interfaced Distributed Generators

IF 3.8 2区工程技术

IEEE Transactions on Power Delivery Pub Date : 2025-02-11 DOI: 10.1109/TPWRD.2025.3540446

Soham Chakraborty;Sarasij Das;Utkarsh Singh;Aleksandra Lekić;Ravi Singh;Jose de Jesus Chavez;Marjan Popov

{"title":"Influence of Control and Limiter Schemes on Sequence-Domain Fault Models of Grid-Forming Inverter-Interfaced Distributed Generators","authors":"Soham Chakraborty;Sarasij Das;Utkarsh Singh;Aleksandra Lekić;Ravi Singh;Jose de Jesus Chavez;Marjan Popov","doi":"10.1109/TPWRD.2025.3540446","DOIUrl":"10.1109/TPWRD.2025.3540446","url":null,"abstract":"Unlike synchronous generators, the fault response of grid-forming (GFM) inverter-interfaced distributed generators (IIDGs) is notably governed by the selection of control and current limiting strategies rather than inherent physical traits. While recent research has focused on the sequence domain fault model of GFM IIDGs, a research gap exists in elucidating the influence of control and current limiting schemes on this model's characteristics. This article aims to fill this void by examining how different control and current limiting schemes influence the positive and negative sequence impedances in the phasor-domain fault model of GFM IIDGs. This investigation encompasses droop-based, virtual synchronous machine-based, and virtual oscillator-based reference generation controls alongside rotating and stationary reference-frame-based voltage controls. Furthermore, saturation-based, latching-based, circular and virtual impedance-based current limiting schemes are analyzed. To achieve this goal, a thorough numerical simulation study is conducted. Findings indicate that outer reference generation controls exhibit minimal impact. Conversely, the choice of voltage control and various current limiting schemes emerge as the predominant factors shaping the sequence models of GFM IIDGs. These analyses and results are instrumental in devising reliable protection strategies within inverter-based grids, as a comprehensive understanding of electrical elements in the sequence domain is imperative for effective protective measures.","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"40 2","pages":"1040-1053"},"PeriodicalIF":3.8,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143392914","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

Disturbance Observation and Improved MPC Based Harmonic Resonance Suppression Strategy for MMC in Offshore Wind Farms

IF 3.8 2区工程技术

IEEE Transactions on Power Delivery Pub Date : 2025-02-10 DOI: 10.1109/TPWRD.2025.3540163

Qingchuan Fan;Shuaijie Wang;Zhi Zheng;Rong Wu;Ping Liu;Qiuqin Sun

{"title":"Disturbance Observation and Improved MPC Based Harmonic Resonance Suppression Strategy for MMC in Offshore Wind Farms","authors":"Qingchuan Fan;Shuaijie Wang;Zhi Zheng;Rong Wu;Ping Liu;Qiuqin Sun","doi":"10.1109/TPWRD.2025.3540163","DOIUrl":"10.1109/TPWRD.2025.3540163","url":null,"abstract":"As considerable offshore wind farms (OWFs) are penetrated into power gird. The capacitive effect of long submarine cable causes serious harmonic resonance problems. An improved control strategy for modular multilevel converter (MMC) in OWF is investigated in this paper. The disturbance observer (DOB), which is used to monitor the variation of various system parameters and grid voltage disturbances, is integrated into the control framework of a dual-vector model predictive control (MPC), which aims at the minimum of the enclosed area between the output and the reference current in a single cycle, which ensures the optimal THD of the output current. The DOB compensates the output current and improves the quality of the AC current, which in turn suppresses the harmonic resonance, and enables active damping and enhances the dynamic response performance. A set of simulations have been performed, and the proposed scheme is verified by hardware-in-the-loop experiments by using RT-LAB. The results indicate that the proposed scheme has high current quality with low THD value, high dynamic performance and interference immunity under sudden current change, inductor parameter mismatch and harmonic injection.","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"40 2","pages":"1129-1142"},"PeriodicalIF":3.8,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143385545","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

CMKR-PBDM: A Transmission Line Pin-Missing Bolts Detection Method Based on Cross-Media and Knowledge Reasoning

IF 3.8 2区工程技术

IEEE Transactions on Power Delivery Pub Date : 2025-02-10 DOI: 10.1109/TPWRD.2025.3540475

Wenqing Zhao;Yingxue Ding;Le Zhang;Bin Liu;Cen Yang;Zhenhuan Zhao;Zhenbing Zhao;Yongjie Zhai;Minfu Xu

{"title":"CMKR-PBDM: A Transmission Line Pin-Missing Bolts Detection Method Based on Cross-Media and Knowledge Reasoning","authors":"Wenqing Zhao;Yingxue Ding;Le Zhang;Bin Liu;Cen Yang;Zhenhuan Zhao;Zhenbing Zhao;Yongjie Zhai;Minfu Xu","doi":"10.1109/TPWRD.2025.3540475","DOIUrl":"10.1109/TPWRD.2025.3540475","url":null,"abstract":"To address the limited single-image information-processing method, insufficient global knowledge-processing capability of the traditional model, and the lack of explainability in detection results for the task of transmission line pin-missing bolts detection, the researchers propose a pin-missing bolts detection method based on cross-media and knowledge reasoning (CMKR-PBDM). First, we construct a fitting-bolt image-text pair dataset and a bolt knowledge graph (BoltKG). Subsequently, a cross-media bolt knowledge fusion model (CBKFM) is proposed, thus generating the image's overall text description by fusing the global knowledge extracted by the FB-GPT with the local knowledge captured by YOLOv8. Finally, the study proposes a large language reasoning model based on the knowledge graph (LLRM-KG), which utilizes BoltKG to guide the big language model in performing knowledge reasoning on the CBKFM output information; thus, explainable pin-missing bolts detection results are obtained. In the experimental stage, the researchers select bolts on four types of background fittings as experimental objects. The experimental results indicate that the method not only improves the accuracy of pin-missing bolts detection, but also makes the pin-missing bolts detection results explainable.","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"40 2","pages":"1030-1039"},"PeriodicalIF":3.8,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143385614","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

MiT-UNet: Mixed Transformer UNet for Transmission Line Segmentation in UAV Images

IF 4.4 2区工程技术

IEEE Transactions on Power Delivery Pub Date : 2025-02-07 DOI: 10.1109/tpwrd.2025.3536858

Ning Wei, Jianwei Chen, Shuifa Sun

引用次数: 0

Adaptive-Grained Exponential Integrator Algorithm for Efficient Simulation of Power Converter Systems 用于高效模拟功率转换器系统的自适应粒度指数积分器算法

IF 3.8 2区工程技术

IEEE Transactions on Power Delivery Pub Date : 2025-02-07 DOI: 10.1109/TPWRD.2025.3539681

Jared Paull;Carl Knickle;Nicole Lofroth;Liwei Wang;Wei Li

{"title":"Adaptive-Grained Exponential Integrator Algorithm for Efficient Simulation of Power Converter Systems","authors":"Jared Paull;Carl Knickle;Nicole Lofroth;Liwei Wang;Wei Li","doi":"10.1109/TPWRD.2025.3539681","DOIUrl":"10.1109/TPWRD.2025.3539681","url":null,"abstract":"Electromagnetic transient (EMT) simulation is increasingly important for complex power electronic converter system design and validation. This paper proposes an adaptive-grained exponential integrator (AGEI) algorithm designed to efficiently simulate power electronic networks. The AGEI algorithm relies on precomputation of carefully-chosen discretization steps to reduce memory burden. It then performs sequential intermediate integrations between discrete switching events to accelerate transient simulation. The variable time-step, high-order integration algorithm finds a balance between simulation run-time and computational overhead. The AGEI algorithm varies the number of the forcing function terms to meet desirable error thresholds. The proposed algorithm is L-stable and can be flexibly applied to stiff and non-stiff circuit systems, rendering it suitable for a wide arrange of power converter topologies and parameters. A hardware experimental study validates the AGEI algorithm's accuracy while simulation case studies demonstrate the AGEI algorithm significantly improves numerical efficiency. It is shown in the typical converter case studies that the proposed algorithm enables more than 8-fold and 3-fold simulation speedup compared to popular simulation tools, i.e., Simulink and PLECS, respectively. The numerical efficiency gains of the proposed algorithm become more apparent for power converter circuits with only-DC input sources or stiff circuit systems.","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"40 2","pages":"1114-1128"},"PeriodicalIF":3.8,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143367312","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

Distribution Systems Fault Location Identification Using Mixed Datasets

IF 3.8 2区工程技术

IEEE Transactions on Power Delivery Pub Date : 2025-02-07 DOI: 10.1109/TPWRD.2025.3539734

Ali Shakeri Kahnamouei;Saeed Lotfifard

{"title":"Distribution Systems Fault Location Identification Using Mixed Datasets","authors":"Ali Shakeri Kahnamouei;Saeed Lotfifard","doi":"10.1109/TPWRD.2025.3539734","DOIUrl":"10.1109/TPWRD.2025.3539734","url":null,"abstract":"This paper proposes a method for identifying fault locations in active distribution networks equipped with inverter-interfaced distributed generations (IIDGs). The proposed method is capable of utilizing all available mixed datasets of modern distribution networks to improve the performance and precision of the fault location identification results. The dataset may include analog/oscillography data and discrete/status data. A causal model for the faulted system based on probabilistic Petri-Nets and backward reachability analysis is developed that utilizes the collected discrete/status data to determine the faulted section of the system. The model accounts for possible failures of protective devices and false notifications from fault indicators. An enhanced impedance-based fault location identification method is proposed that utilizes analog data from micro-PMUs and/or legacy measuring devices to estimate the exact location of the fault within the identified faulted section. It explicitly accounts for the uncertainties in the collected data. The proposed method's performance is showcased by simulating the IEEE 34-node distribution test system.","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"40 2","pages":"951-964"},"PeriodicalIF":3.8,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143367311","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

Single-Ended Remote Backup Protection Based on Fault Distance Factor of Traveling Wavefront

IF 3.8 2区工程技术

IEEE Transactions on Power Delivery Pub Date : 2025-02-06 DOI: 10.1109/TPWRD.2025.3539280

Chenhao Zhang;Yan Jifei;Guobing Song

{"title":"Single-Ended Remote Backup Protection Based on Fault Distance Factor of Traveling Wavefront","authors":"Chenhao Zhang;Yan Jifei;Guobing Song","doi":"10.1109/TPWRD.2025.3539280","DOIUrl":"10.1109/TPWRD.2025.3539280","url":null,"abstract":"Zone III distance protection has long operating time and its sensitivity decreases significantly in renewable energy scenarios. In this paper, novel single-ended remote backup protection is proposed based on fault location information contained in traveling wavefront. Firstly, it is demonstrated that the fault distance factor of traveling wavefront is effective in reflecting location of fault in both radial and meshed topologies. Then fault distance-operating time inverse-time characteristic is designed based on fault distance factor, realizing spontaneous sequencing of operating time between the relays at higher and lower zones. This inverse-time characteristic is only determined by location of fault and not influenced by operation mode, control strategy, fault type, fault resistance, etc. A robust algorithm is proposed to efficiently extract the fault distance factor, ensuring protection reliability. Resetting criterions are designed to re-check the existence of fault, avoiding leapfrog tripping and maloperation confronting disturbances. The setting of proposed protection is simple, without the need to update the threshold value according to the system status. Verifications have demonstrated that the proposed protection can be self-adaptive to flexible operation mode of renewable energy transmission system and different topologies. The proposed method also demonstrates high tolerance to fault resistance and noise while maintaining fast operating speed.","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"40 2","pages":"1143-1157"},"PeriodicalIF":3.8,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143258522","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 State Variables Elimination-Based EMTP-Type Constant Admittance Equivalent Modeling Method for Power Electronic Converters

IF 3.8 2区工程技术

IEEE Transactions on Power Delivery Pub Date : 2025-02-06 DOI: 10.1109/TPWRD.2025.3539334

Mingwang Xu;Wei Gu;Yang Cao;Shuaixian Chen;Fei Zhang;Wei Liu

{"title":"A State Variables Elimination-Based EMTP-Type Constant Admittance Equivalent Modeling Method for Power Electronic Converters","authors":"Mingwang Xu;Wei Gu;Yang Cao;Shuaixian Chen;Fei Zhang;Wei Liu","doi":"10.1109/TPWRD.2025.3539334","DOIUrl":"10.1109/TPWRD.2025.3539334","url":null,"abstract":"Currently, a multitude of power electronic devices are connected to the grid, and the safe and stable operation of the grid depends on the analysis of electromagnetic transient (EMT) simulation technology. This paper proposes a state variables elimination-based EMTP-type constant admittance equivalent modeling method for power electronic converters. The method employs a three-layer architecture consisting of ‘network-nodal voltages-historical current source’. The low-order equivalent nodal voltage equation is generated by using matrix splitting and adding output equations. The proposed method is distinguished by a constant admittance matrix and the consideration of internal characteristics, which facilitates straightforward access to external circuit, low time-complexity, and uncomplicated modeling procedures in comparison with the classical node elimination method (NEM). Furthermore, it exhibits a degree of generality regarding modular and unitized electrical equipment. The accuracy of the proposed method is validated by comparison with the off-line EMT simulation and experiments. The test results demonstrate that the proposed method exhibits high accuracy and efficiency in a variety of scenarios.","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"40 2","pages":"1100-1113"},"PeriodicalIF":3.8,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143258568","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

Synchronous Machine Imitation Control of MMC Stations Adaptable for Both Strong and Weak Grids

IF 3.8 2区工程技术

IEEE Transactions on Power Delivery Pub Date : 2025-02-05 DOI: 10.1109/TPWRD.2025.3538914

Zheren Zhang;Hanlin Guo;Zheng Xu

引用次数: 0