{"title":"仅从终端测得的频率响应数据估算变压器绕组串联电容的非迭代分析方法","authors":"","doi":"10.1016/j.epsr.2024.111086","DOIUrl":null,"url":null,"abstract":"<div><p>This paper presents a novel and non-iterative methodology for estimating the series capacitance (<span><math><msub><mrow><mi>C</mi></mrow><mrow><mi>s</mi></mrow></msub></math></span>) of power transformer windings based on terminal measurements through Frequency Response Analysis (FRA). Departing from conventional approaches that require detailed geometrical information, the proposed method utilizes practical terminal-based FRA, making <span><math><msub><mrow><mi>C</mi></mrow><mrow><mi>s</mi></mrow></msub></math></span> estimation accessible to end-users. By categorizing the frequency response into low (<span><math><msub><mrow><mi>f</mi></mrow><mrow><mi>L</mi></mrow></msub></math></span>), mid (<span><math><msub><mrow><mi>f</mi></mrow><mrow><mi>M</mi></mrow></msub></math></span>), and high (<span><math><msub><mrow><mi>f</mi></mrow><mrow><mi>H</mi></mrow></msub></math></span>) frequency regions, targeted analysis is enabled. Extensive simulations and experimental studies on various windings, including single-layer, continuous disc, interleaved, and two-winding configurations, validate the method’s accuracy and versatility. The results show that estimated <span><math><msub><mrow><mi>C</mi></mrow><mrow><mi>s</mi></mrow></msub></math></span> values closely match those from analytical calculations and Finite Element Method (FEM) simulations, with minimal errors. Key contributions of this work include a clear, step-by-step methodology for <span><math><msub><mrow><mi>C</mi></mrow><mrow><mi>s</mi></mrow></msub></math></span> estimation through terminal-measured frequency response that eliminates the need for lookup tables, curve fitting, or model estimation, and demonstrates high accuracy under the impact of noise signals and transformer oil. The practical applicability of the proposed method is showcased through deformation diagnosis and voltage distribution analysis, highlighting its potential for widespread adoption in real-world scenarios.</p></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":null,"pages":null},"PeriodicalIF":3.3000,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0378779624009714/pdfft?md5=a9d849096ef32be21171dda658bafc3f&pid=1-s2.0-S0378779624009714-main.pdf","citationCount":"0","resultStr":"{\"title\":\"A non-iterative analytical approach for estimating series-capacitance in transformer windings solely from terminal measured frequency response data\",\"authors\":\"\",\"doi\":\"10.1016/j.epsr.2024.111086\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>This paper presents a novel and non-iterative methodology for estimating the series capacitance (<span><math><msub><mrow><mi>C</mi></mrow><mrow><mi>s</mi></mrow></msub></math></span>) of power transformer windings based on terminal measurements through Frequency Response Analysis (FRA). Departing from conventional approaches that require detailed geometrical information, the proposed method utilizes practical terminal-based FRA, making <span><math><msub><mrow><mi>C</mi></mrow><mrow><mi>s</mi></mrow></msub></math></span> estimation accessible to end-users. By categorizing the frequency response into low (<span><math><msub><mrow><mi>f</mi></mrow><mrow><mi>L</mi></mrow></msub></math></span>), mid (<span><math><msub><mrow><mi>f</mi></mrow><mrow><mi>M</mi></mrow></msub></math></span>), and high (<span><math><msub><mrow><mi>f</mi></mrow><mrow><mi>H</mi></mrow></msub></math></span>) frequency regions, targeted analysis is enabled. Extensive simulations and experimental studies on various windings, including single-layer, continuous disc, interleaved, and two-winding configurations, validate the method’s accuracy and versatility. The results show that estimated <span><math><msub><mrow><mi>C</mi></mrow><mrow><mi>s</mi></mrow></msub></math></span> values closely match those from analytical calculations and Finite Element Method (FEM) simulations, with minimal errors. Key contributions of this work include a clear, step-by-step methodology for <span><math><msub><mrow><mi>C</mi></mrow><mrow><mi>s</mi></mrow></msub></math></span> estimation through terminal-measured frequency response that eliminates the need for lookup tables, curve fitting, or model estimation, and demonstrates high accuracy under the impact of noise signals and transformer oil. The practical applicability of the proposed method is showcased through deformation diagnosis and voltage distribution analysis, highlighting its potential for widespread adoption in real-world scenarios.</p></div>\",\"PeriodicalId\":50547,\"journal\":{\"name\":\"Electric Power Systems Research\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.3000,\"publicationDate\":\"2024-09-20\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S0378779624009714/pdfft?md5=a9d849096ef32be21171dda658bafc3f&pid=1-s2.0-S0378779624009714-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Electric Power Systems Research\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0378779624009714\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENGINEERING, ELECTRICAL & ELECTRONIC\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Electric Power Systems Research","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0378779624009714","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
A non-iterative analytical approach for estimating series-capacitance in transformer windings solely from terminal measured frequency response data
This paper presents a novel and non-iterative methodology for estimating the series capacitance () of power transformer windings based on terminal measurements through Frequency Response Analysis (FRA). Departing from conventional approaches that require detailed geometrical information, the proposed method utilizes practical terminal-based FRA, making estimation accessible to end-users. By categorizing the frequency response into low (), mid (), and high () frequency regions, targeted analysis is enabled. Extensive simulations and experimental studies on various windings, including single-layer, continuous disc, interleaved, and two-winding configurations, validate the method’s accuracy and versatility. The results show that estimated values closely match those from analytical calculations and Finite Element Method (FEM) simulations, with minimal errors. Key contributions of this work include a clear, step-by-step methodology for estimation through terminal-measured frequency response that eliminates the need for lookup tables, curve fitting, or model estimation, and demonstrates high accuracy under the impact of noise signals and transformer oil. The practical applicability of the proposed method is showcased through deformation diagnosis and voltage distribution analysis, highlighting its potential for widespread adoption in real-world scenarios.
期刊介绍:
Electric Power Systems Research is an international medium for the publication of original papers concerned with the generation, transmission, distribution and utilization of electrical energy. The journal aims at presenting important results of work in this field, whether in the form of applied research, development of new procedures or components, orginal application of existing knowledge or new designapproaches. The scope of Electric Power Systems Research is broad, encompassing all aspects of electric power systems. The following list of topics is not intended to be exhaustive, but rather to indicate topics that fall within the journal purview.
• Generation techniques ranging from advances in conventional electromechanical methods, through nuclear power generation, to renewable energy generation.
• Transmission, spanning the broad area from UHV (ac and dc) to network operation and protection, line routing and design.
• Substation work: equipment design, protection and control systems.
• Distribution techniques, equipment development, and smart grids.
• The utilization area from energy efficiency to distributed load levelling techniques.
• Systems studies including control techniques, planning, optimization methods, stability, security assessment and insulation coordination.