摘要
为了验证110 kV固态气体灭弧防雷间隙的工频续流遮断能力,需要对其进行雷电冲击放电试验,确定间隙距离和50%放电电压,再进行工频续流遮断试验,测量工频续流幅值和工频续流持续时间。依据GB/T 16927和IEC 60060中的相关规定使用3000 kV/675 kJ冲击电压发生器对间隙进行雷电冲击放电试验,试验确定110 kV固态气体灭弧防雷间隙的最大有效距离约890 mm,50%放电电压约568.4 kV。根据标准搭建工频续流遮断试验平台,该平台能同时产生1.2/50μs标准雷电冲击电压和50 Hz工频电压,并设置同步控制回路,能在不同相位角同时施加冲击电压和工频电压。工频续流遮断试验结果表明:110 kV固态气体灭弧防雷间隙能在4 ms以内熄灭最大幅值2.3 kA的工频续流,并且不会发生重燃。
In order to verify the capacity of the solid gas arc-quenching lightning protection gap(SGALPG)in 110 kV lines,lightning impulse test is needed to determine the distance and the 50%flashover voltage of SGALPG.Then power frequency follow current interruption test is carried out to measure the amplitude and duration of power frequency current.We conducted lightning impulse test on SGALPG with 3000 kV/675 kJ impulse voltage generator according to the provisions of GB/T 16927 and IEC 60060.It was determined that the maximum effective distance of SGALPG was approximately 890 mm,and the 50%flashover voltage should be greater than 568.4 kV.The test platform of the power frequency follow current interruption,built under specifications,could generate 1.2/50μs lightning impulse voltage and power frequency voltage of approximately 50 Hz at the same time.And the synchronous control circuit was set up,which could apply lightning impulse and power frequency voltage at different phase angles.The test results show that the gap of 110 kV SGALPG can extinguish a maximum value of 2.3 kA in approximately 4 ms with no reignition.
作者
王巨丰
徐宇恒
WANG Ju-feng;XU Yu-heng(School of Electrical Engineering,Guangxi University,Nanning 530004,China)
出处
《广西大学学报（自然科学版）》
CAS
北大核心
2021年第2期414-421,共8页
Journal of Guangxi University（Natural Science Edition）
基金
广西科技重大专项(AA18242050)。
关键词
固态气体灭弧
防雷间隙
冲击放电
工频续流
电弧重燃
solid gas arc-quenching
lightning protection gap
impulse discharge
power frequency follow current
arc reignition
