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Comparative study on corona-generated audible noise and radio noise of ac long-term operating conductors with two bundle types
Institution:1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China;2. Beijing Key Laboratory of High Voltage and EMC, North China Electric Power University, Beijing, 102206, China;3. Jibei Electric Power Company Limited, Beiijing 100053, PR China;4. Jiangsu Electric Power Company Research Institute, Nanjing, Jiangsu Province 210036, PR China;5. State Grid Chongqing Nan''an Power Supply Company, Chongqing 400060, PR China;6. Graduate School at Shenzhen, Tsinghua University, Shenzhen, Guangdong Province 518055, PR China;1. Département Fluide-Thermique-Combustion, Institut PPRIME, Université de Poitiers, Boulevard Pierre et Marie Curie, BP 30179, 86962 Futuroscope-Chasseneuil, France;2. Departamento de Electrónica y Electromagnetismo, Universidad de Sevilla, Facultad de Física, Avenida Reina Mercedes s/n, 41012 Sevilla, Spain;3. Departamento de Física Aplicada III, Universidad de Sevilla, ESI, Camino de los Descubrimientos s/n, 41092 Sevilla, Spain;1. State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China;2. Siyuan Laboratory, Department of Physics, Jinan University, Guangzhou 510632, China;3. School of Chemistry & Environment, South China Normal University, Guangzhou 510006, China;4. State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, 510641, China;1. College of Instrumentation and Electrical Engineering, Jilin University, Changchun 130021, China;2. School of Transportation, Jilin University, Changchun 130025, China;1. Graduate School of Science and Engineering, Saitama University, Saitama, Japan;2. R&D Center, Tokyo Electric Power Co., Yokohama, Japan
Abstract:The corona-generated audible noise (AN) and radio noise (RN) of the long-term operating conductors with two bundle types was investigated and compared based on a corona cage measurement system. The surface morphologies of eight conductors were measured and the average surface roughness (Ra) was calculated. With the raise of conductor bundles, the maximum electric field distortion level (β4), the relative difference of ionization intensity (γ4) between long-term operating conductors and new conductors decreased. Adding the number of sub-conductors turned out to be an effective method to improve AN and RN of long-term operating conductors in the contaminated areas.
Keywords:Corona discharge  Conductor bundle  Surface roughness  Corona cage  Radio noise  Audible noise
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