Pub Date : 2024-09-23DOI: 10.1109/tpwrd.2024.3466314
Yin Chen, Lie Xu, Agustí Egea-Àlvarez, Eoin Hodge, Shahab Sajedi, Keith McCullough, Paul McKeever, Michael Smailes
{"title":"Stability Assessment and Improvement of MTDC System Connected with Offshore Wind Farms","authors":"Yin Chen, Lie Xu, Agustí Egea-Àlvarez, Eoin Hodge, Shahab Sajedi, Keith McCullough, Paul McKeever, Michael Smailes","doi":"10.1109/tpwrd.2024.3466314","DOIUrl":"https://doi.org/10.1109/tpwrd.2024.3466314","url":null,"abstract":"","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"77 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142313467","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}
Pub Date : 2024-09-23DOI: 10.1109/tpwrd.2024.3466297
Marko Novkovic, Federico Torriano, Patrick Picher, Zoran Radakovic
{"title":"Application of Dynamic Detailed Thermal Hydraulic Model on a Transformer with zig-zag winding scale model","authors":"Marko Novkovic, Federico Torriano, Patrick Picher, Zoran Radakovic","doi":"10.1109/tpwrd.2024.3466297","DOIUrl":"https://doi.org/10.1109/tpwrd.2024.3466297","url":null,"abstract":"","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"25 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142313474","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}
{"title":"A denoising method for partial discharge ultrasonic signals in GIS based on ultra-high frequency signal synchronization","authors":"Xing Li, Dengwei Ding, Yuan Xu, Jinpeng Jiang, Xiaoxin Chen, Minghu Yuan","doi":"10.1109/tpwrd.2024.3465506","DOIUrl":"https://doi.org/10.1109/tpwrd.2024.3465506","url":null,"abstract":"","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"22 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142275385","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}
Pub Date : 2024-09-18DOI: 10.1109/tpwrd.2024.3463174
Yihua Dan, Zhanlong Zhang, Siqi Bu, Chak-Nam Wong, Puiyu Lin
{"title":"Analysis of Grounding Performance of Tower Grounding Electrodes in Elevated Terrain","authors":"Yihua Dan, Zhanlong Zhang, Siqi Bu, Chak-Nam Wong, Puiyu Lin","doi":"10.1109/tpwrd.2024.3463174","DOIUrl":"https://doi.org/10.1109/tpwrd.2024.3463174","url":null,"abstract":"","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"98 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142245739","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}
{"title":"Common-Mode Frequency of Power Systems Affected by Voltage Dynamics","authors":"Huisheng Gao, Huanhai Xin, Guang Hu, Hui Yuan, Linbin Huang, Ping Ju","doi":"10.1109/tpwrd.2024.3461340","DOIUrl":"https://doi.org/10.1109/tpwrd.2024.3461340","url":null,"abstract":"","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"63 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142231644","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}
Pub Date : 2024-09-13DOI: 10.1109/tpwrd.2024.3461448
Mahmoud A. Elshenawy, Amr Radwan, Yasser Abdel-Rady I. Mohamed
{"title":"Analysis and Weakening of Sequence Impedance Coupling in Grid-Forming Converters","authors":"Mahmoud A. Elshenawy, Amr Radwan, Yasser Abdel-Rady I. Mohamed","doi":"10.1109/tpwrd.2024.3461448","DOIUrl":"https://doi.org/10.1109/tpwrd.2024.3461448","url":null,"abstract":"","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"32 1","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142231643","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}
Moisture equilibrium curve of oil paper (MEC-OP) is an important and commonly used foundational curve in transformer design and condition assessment. For AC transformers, the MEC-OP is weakly affected by the electric field, so only considering the temperature. However, for the converter transformer, the DC electric field present inside has not yet been considered. Therefore, Based on a new method of moisture distribution measurement by terahertz spectroscopy, a novel curve of MEC-OP considering the effect of DC electric field is obtained. The results show that the moisture in oil and paper increases as the field strength grows, the reason leading to the rise of moisture may be the effect of electric field force and dielectrophoretic force, while molecular simulation calculation is employed to support in explaining the experimental phenomena. Then, the coefficient of the field strength affecting the moisture content is introduced to correct the MEC-OP, and the moisture of cardboard calculated at 25 kV/mm under 40 °C, 60 °C, and 80 °C increases by 15.65%, 19.68%, and 32.92%, respectively. This research fills a gap in the effect of DC electric field on the MEC-OP under the converter transformer and provides support for the accurate calculation of the moisture in insulating paper.
{"title":"A Novel Curve of Moisture Equilibrium of Oil Paper Based on the Effect of Electric Field","authors":"Hao Luo;Li Cheng;Zhiling Chen;Wangjun Deng;Xuetong Zhao;Lijun Yang;Ruijin Liao","doi":"10.1109/TPWRD.2024.3459047","DOIUrl":"10.1109/TPWRD.2024.3459047","url":null,"abstract":"Moisture equilibrium curve of oil paper (MEC-OP) is an important and commonly used foundational curve in transformer design and condition assessment. For AC transformers, the MEC-OP is weakly affected by the electric field, so only considering the temperature. However, for the converter transformer, the DC electric field present inside has not yet been considered. Therefore, Based on a new method of moisture distribution measurement by terahertz spectroscopy, a novel curve of MEC-OP considering the effect of DC electric field is obtained. The results show that the moisture in oil and paper increases as the field strength grows, the reason leading to the rise of moisture may be the effect of electric field force and dielectrophoretic force, while molecular simulation calculation is employed to support in explaining the experimental phenomena. Then, the coefficient of the field strength affecting the moisture content is introduced to correct the MEC-OP, and the moisture of cardboard calculated at 25 kV/mm under 40 °C, 60 °C, and 80 °C increases by 15.65%, 19.68%, and 32.92%, respectively. This research fills a gap in the effect of DC electric field on the MEC-OP under the converter transformer and provides support for the accurate calculation of the moisture in insulating paper.","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"39 6","pages":"3268-3278"},"PeriodicalIF":3.8,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142174751","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}
Pub Date : 2024-09-12DOI: 10.1109/TPWRD.2024.3458804
Amir Aghazadeh;Ehsan Hajipour;Vladimir Terzija;Sadegh Azizi
Inrush current refers to the high-magnitude current drawn by a power transformer upon energization. The severity of inrush current is a function of the instantaneous value of voltage at the energization instant and the transformer's residual flux density. This paper proposes an effective energization method for mitigating the inrush current of single-phase power transformers. The method does not rely on the knowledge of transformer design specifications, but the magnitude of the transformer's excitation current. The reference residual flux density is determined with respect to the limitations of the closing operation of the circuit breaker. The method then adjusts the residual flux density of the core to a value deemed appropriate by injecting controlled current into the transformer's winding. This is followed by identifying an appropriate instant for transformer energization that matches the instantaneous value of the steady-state flux density with the adjusted flux density. To validate the efficiency of the proposed method, over 8,000 simulations are conducted in PSCAD/EMTDC. The method is also implemented on a laboratory-scale testbed and extensively tested to demonstrate its effectiveness and superiority over most recent methods under a wide variety of realistic conditions.
{"title":"A Flux Matching Method for Mitigating the Inrush Current of Single-Phase Transformers","authors":"Amir Aghazadeh;Ehsan Hajipour;Vladimir Terzija;Sadegh Azizi","doi":"10.1109/TPWRD.2024.3458804","DOIUrl":"10.1109/TPWRD.2024.3458804","url":null,"abstract":"Inrush current refers to the high-magnitude current drawn by a power transformer upon energization. The severity of inrush current is a function of the instantaneous value of voltage at the energization instant and the transformer's residual flux density. This paper proposes an effective energization method for mitigating the inrush current of single-phase power transformers. The method does not rely on the knowledge of transformer design specifications, but the magnitude of the transformer's excitation current. The reference residual flux density is determined with respect to the limitations of the closing operation of the circuit breaker. The method then adjusts the residual flux density of the core to a value deemed appropriate by injecting controlled current into the transformer's winding. This is followed by identifying an appropriate instant for transformer energization that matches the instantaneous value of the steady-state flux density with the adjusted flux density. To validate the efficiency of the proposed method, over 8,000 simulations are conducted in PSCAD/EMTDC. The method is also implemented on a laboratory-scale testbed and extensively tested to demonstrate its effectiveness and superiority over most recent methods under a wide variety of realistic conditions.","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"39 6","pages":"3255-3267"},"PeriodicalIF":3.8,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142174698","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}
Pub Date : 2024-09-10DOI: 10.1109/TPWRD.2024.3457578
Qiucen Tao;Maëva Courcelle;Johanna Geis-Schroer;Thomas Leibfried;Giovanni De Carne
The power-to-voltage sensitivity of a load describes how power consumption depends on changes in voltage magnitude. It is a critical system characteristic used for power system control actions such as conservation voltage reduction and voltage-led load management. Voltage sensitivity depends on the operating state of loads, which can vary over time. However, the time-varying characteristic of voltage sensitivity is often ignored in power system analysis and has been considered as a constant parameter. This paper seeks to contribute to filling this gap by experimentally analyzing the time-varying voltage sensitivity profiles of 21 common residential appliances with a sub-minute time scale resolution, conducted in a 60 m 2 apartment-like laboratory. The obtained sensitivity profiles, provided as an open-access dataset, can be used as building blocks that allow a flexible synthesis of voltage sensitivity profiles for complex aggregated residential loads. In addition to the individual load profiles, a typical daily power profile for a 2-person apartment was experimentally reproduced to study the voltage sensitivity profile of an aggregated residential load.
{"title":"Experimental Investigation of Power-to-Voltage Sensitivity Profiles of Residential Loads for Load Management Studies","authors":"Qiucen Tao;Maëva Courcelle;Johanna Geis-Schroer;Thomas Leibfried;Giovanni De Carne","doi":"10.1109/TPWRD.2024.3457578","DOIUrl":"10.1109/TPWRD.2024.3457578","url":null,"abstract":"The power-to-voltage sensitivity of a load describes how power consumption depends on changes in voltage magnitude. It is a critical system characteristic used for power system control actions such as conservation voltage reduction and voltage-led load management. Voltage sensitivity depends on the operating state of loads, which can vary over time. However, the time-varying characteristic of voltage sensitivity is often ignored in power system analysis and has been considered as a constant parameter. This paper seeks to contribute to filling this gap by experimentally analyzing the time-varying voltage sensitivity profiles of 21 common residential appliances with a sub-minute time scale resolution, conducted in a 60 m\u0000<sup>2</sup>\u0000 apartment-like laboratory. The obtained sensitivity profiles, provided as an open-access dataset, can be used as building blocks that allow a flexible synthesis of voltage sensitivity profiles for complex aggregated residential loads. In addition to the individual load profiles, a typical daily power profile for a 2-person apartment was experimentally reproduced to study the voltage sensitivity profile of an aggregated residential load.","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"39 6","pages":"3243-3254"},"PeriodicalIF":3.8,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10670516","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142166442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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