Research on the distributed capacitance for high-voltage key components on CRAFT NNBI  

作　　者：Bo LIU Zhimin LIU Caichao JIANG Sheng LIU Junjun PAN Shiyong CHEN Wei WEI Yuchen QU Lizhen LIANG Ruoxin BAI Yuanlai XIE 刘波;刘智民;蒋才超;刘胜;潘军军;陈世勇;魏伟;屈宇琛;梁立振;白若昕;谢远来

机构地区：[1]Institute of Plasma Physics,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,People’s Republic of China [2]University of Science and Technology of China,Hefei 230026,People’s Republic of China [3]College of Astronautics,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,People’s Republic of China

出　　处：《Plasma Science and Technology》2025年第4期58-63,共6页等离子体科学和技术(英文版)

基　　金：supported by the Comprehensive Research Facility for Fusion Technology Program of China(No.2018000052-73-01-001228);National Natural Science Foundation of China(No.11975263);Postgraduate Research and Practice Innovation Program of NUAA(No.xcxjh20231501)。

摘　　要：The negative ion based neutral beam injector(NNBI)with a beam energy of 400 keV is one of the subsystems at the Comprehensive Research fAcility for Fusion Technology(CRAFT)in China.The distributed capacitance of the high-voltage components is an important basis for the design of surge suppression devices at CRAFT NNBI.This study conducted calculations of distributed capacitance for the key components,including the high-voltage deck,transmission line and isolation transformer in the power supply system using the finite element method.The relationship between the high-voltage deck(HVD)distributed capacitance and the distance from the wall is discussed.The differences in distributed capacitance and energy storage between noncoaxial and coaxial transmission lines are also debated.Finally,the capacitance between the primary and secondary windings of the-400 kV isolation transformer,as well as between the secondary winding and the oil tank casing,was calculated.

关 键 词：NNBI power supply system direct-current high voltage distributed capacitance finite elements analysis(Some figures may appear in colour only in the online journal) 

分 类 号：TL62[核科学技术—核技术及应用]