基于故障录波器的直流滤波器接地故障分析方法  

DC Filter Grounding Fault Analysis Method Based on Transient Fault Recorder

作　　者：孙玥[1] 孙小羊[2] 魏欣[1] SUN Yue;SUN Xiaoyang;WEI Xin(School of Intelligent Transportation,Nanjing Vocational College of Information Technology,Nanjing Jangsu 210023,China;School of Electronic Information Engineering,San Jiang University,Nanjing Jangsu 210012,China)

机构地区：[1]南京信息职业技术学院智能交通学院,江苏南京210023 [2]三江学院电子信息工程学院,江苏南京210012

出　　处：《电子器件》2022年第3期695-700,共6页Chinese Journal of Electron Devices

基　　金：国家自然科学基金面上项目(61674097)。

摘　　要：介绍了一种结合故障录波器和隐式欧拉法的直流滤波器雷电过电压闪络故障反演方法。首先,建立了在外部雷击直流线路直流滤波器内部接地故障情况下的标准状态空间方程。以故障录波器采集到的极直流母线电压和中性线母线电压作为输入激励,分别考虑高压侧电容接地故障和电抗器接地故障两种典型情形,通过数值计算得到各电气特征量。结合直流滤波器各元件的绝缘配合参数,以及电流差动保护判据,分析得到直流滤波器的保护动作情况。与实际现场的保护动作情况比较,可以有助于分析各类型直流滤波器故障的后果影响以及实际情况中的保护未动作和误动作情况,也可判别直流滤波器元件是否绝缘击穿。A DC filter lightning overvoltage flashover fault inversion method combining transient fault recorder and implicit Euler method is introduced.First,the standard state space equations for the internal ground fault of the DC filter of the DC line struck by external lightning are established.Taking the pole bus voltage and neutral bus voltage collected by the transient fault recorder as the input excitation,and considering the two typical cases of high-voltage side capacitor grounding fault and reactor grounding fault,each electrical characteristic value is obtained through numerical calculation.Combining the insulation coordination parameters of the components of the DC filter and the current differential protection criterion,the protection action of the DC filter is analyzed.Compared with the actual on-site protection action,it can help analyze the consequences of various types of DC filter failures,as well as non-operation and wrong action of the protection in the actual situation.It can also determine whether the DC filter components are insulation breakdown.

关 键 词：故障录波器 直流滤波器 雷电过电压 隐式欧拉法 故障反演 

分 类 号：TN713.5[电子电信—电路与系统]