Jia Peng;Ruisong Zhang;Shurong Li;Daning Zhang;Junbo Deng
{"title":"一种用于电力电缆局部放电试验的新型阻尼交流发电机","authors":"Jia Peng;Ruisong Zhang;Shurong Li;Daning Zhang;Junbo Deng","doi":"10.1109/TPWRD.2025.3574802","DOIUrl":null,"url":null,"abstract":"Damped AC (DAC) testing is a widely utilized method for detecting partial discharge (PD) signals in power cables. However, the conventional approach is detrimental to the cable's insulation due to the accumulation of space charge during the DC charging process. To address this issue, this paper proposes a novel DAC generator topology. Compared with the conventional DAC generator, a storage capacitor and a switch are added. In the proposed DAC generator, by conducting switches at different moments, the voltage across the cable oscillates from near zero instead of starting from a high DC voltage, thus preventing the injection of space charge into the cable's insulation layer. To verify the effectiveness of the proposed DAC generator, an experimental platform was established. The results demonstrate that the DAC generator operates normally and successfully initiates PD signals at cable defect sites. The comparative experiments reveal that the total PD quantity under the novel DAC voltage is lower than that under the conventional DAC voltage for two types of defects, which suggests no space charge is injected in the novel DAC approach.","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"40 4","pages":"2278-2288"},"PeriodicalIF":3.7000,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A Novel Damped AC Generator Used for Off-Line Partial Discharge Testing of Power Cables\",\"authors\":\"Jia Peng;Ruisong Zhang;Shurong Li;Daning Zhang;Junbo Deng\",\"doi\":\"10.1109/TPWRD.2025.3574802\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Damped AC (DAC) testing is a widely utilized method for detecting partial discharge (PD) signals in power cables. However, the conventional approach is detrimental to the cable's insulation due to the accumulation of space charge during the DC charging process. To address this issue, this paper proposes a novel DAC generator topology. Compared with the conventional DAC generator, a storage capacitor and a switch are added. In the proposed DAC generator, by conducting switches at different moments, the voltage across the cable oscillates from near zero instead of starting from a high DC voltage, thus preventing the injection of space charge into the cable's insulation layer. To verify the effectiveness of the proposed DAC generator, an experimental platform was established. The results demonstrate that the DAC generator operates normally and successfully initiates PD signals at cable defect sites. The comparative experiments reveal that the total PD quantity under the novel DAC voltage is lower than that under the conventional DAC voltage for two types of defects, which suggests no space charge is injected in the novel DAC approach.\",\"PeriodicalId\":13498,\"journal\":{\"name\":\"IEEE Transactions on Power Delivery\",\"volume\":\"40 4\",\"pages\":\"2278-2288\"},\"PeriodicalIF\":3.7000,\"publicationDate\":\"2025-03-29\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"IEEE Transactions on Power Delivery\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://ieeexplore.ieee.org/document/11017690/\",\"RegionNum\":2,\"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":"IEEE Transactions on Power Delivery","FirstCategoryId":"5","ListUrlMain":"https://ieeexplore.ieee.org/document/11017690/","RegionNum":2,"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 Novel Damped AC Generator Used for Off-Line Partial Discharge Testing of Power Cables
Damped AC (DAC) testing is a widely utilized method for detecting partial discharge (PD) signals in power cables. However, the conventional approach is detrimental to the cable's insulation due to the accumulation of space charge during the DC charging process. To address this issue, this paper proposes a novel DAC generator topology. Compared with the conventional DAC generator, a storage capacitor and a switch are added. In the proposed DAC generator, by conducting switches at different moments, the voltage across the cable oscillates from near zero instead of starting from a high DC voltage, thus preventing the injection of space charge into the cable's insulation layer. To verify the effectiveness of the proposed DAC generator, an experimental platform was established. The results demonstrate that the DAC generator operates normally and successfully initiates PD signals at cable defect sites. The comparative experiments reveal that the total PD quantity under the novel DAC voltage is lower than that under the conventional DAC voltage for two types of defects, which suggests no space charge is injected in the novel DAC approach.
期刊介绍:
The scope of the Society embraces planning, research, development, design, application, construction, installation and operation of apparatus, equipment, structures, materials and systems for the safe, reliable and economic generation, transmission, distribution, conversion, measurement and control of electric energy. It includes the developing of engineering standards, the providing of information and instruction to the public and to legislators, as well as technical scientific, literary, educational and other activities that contribute to the electric power discipline or utilize the techniques or products within this discipline.