高电压技术2017，Vol.43Issue(9)：3036-3041,6.DOI:10.13336/j.1003-6520.hve.20170831035
高海拔地区高压直流屏蔽金具电晕特性
Corona Characteristics of HVDC Shielding Fittings in High Altitude Area
摘要
Abstract
With the advance of the localization of HVDC shielding fittings,more and more domestic shielding fittings such as shielding rings are gradually applied to the converter station,and the corona onset characteristics of the shielding ring with its own size is not clear yet.In order to study the corona characteristics of domestic shielding ring,we designed three groups of shielding ring with the diameter 600,800,and 1 000 mm,according to the typical shielding ring dimensions in ± 500 kV Mujia converter station and Zhaotong converter station valve hall.The experiments were carried out in Kunrning South Network EHV test base (about 2 100 m elevation),loading DC voltage step by step.The ultraviolet imaging instrument was used to determine whether shielding ring had corona discharge and to measure the corresponding corona inception voltage.According to the layout of the test,a 3D simulation model was established to calculate the corresponding corona inception field strength of the shielding ring with the finite element method.The variation tendency between corona inception voltage and electric field with ring diameter and pipe diameter was obtained according to the analysis of corona characteristics of shielding ring,and the corona inception control field strength of typical-size domestic-shielding ring in high altitude area was also obtained.The minimum control value of the field strength is above 21 kV/cm,which can provide the checking reference data for practical engineering and a reference for the design and selection for the advance of the localization valve hall shielding fittings.关键词
屏蔽环/电晕起始电压/电晕起始场强/环径/管径/有限元法Key words
shielding ring/corona inception voltage/corona inception field strength/ring diameter/pipe diameter/finite element method引用本文复制引用
周涛涛,阮江军,杜志叶,金硕,周胜,胡蓉..高海拔地区高压直流屏蔽金具电晕特性[J].高电压技术,2017,43(9):3036-3041,6.基金项目
国家自然科学基金(51477120).Project supported by National Natural Science Foundation of China(51477120). （51477120）
