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Electrostatic Discharge Characteristics of Cable Discharge Event
Yu Zhang,Yafei Yuan,Xiaoqing Li,Ming Yang,Na Feng,Ziwei Lu,Jihao He,Qizheng Ji 대한전기학회 2019 Journal of Electrical Engineering & Technology Vol.14 No.1
The characteristics of cable electrostatic discharge event are investigated, which has been proved to be a hazard leading to ESD damage. The electrostatic voltage under operations on cable is measured and the effects of the discharge parameters including electrostatic voltage, cable length, cable type and the distance to the ground on cable discharge event (CDE) are studied experimentally. The CDE current waveform appears as a sequence of oscillating rectangular pulses with fast rising time, short pulse width but high amplitude. The current amplitude linearly increases with the electrostatic voltage, while the pulse width is mainly determined by the cable length. The distance to the ground and the cable type has little influence once the distance is relatively large. The discharge by cable with multiple cores is also investigated. Theoretical discussion is made to explain the phenomenon and its mechanism.
Jun Zou,Jaebok Lee,Yafei Ji,Sughun Chang Institute of Electrical and Electronics Engineers 2007 IEEE transactions on power delivery Vol.22 No.4
<P>This paper describes an efficient numerical approach for the calculation of the per-unit length earth-return impedance of a conductor inside a tunnel. The influence of the tunnel on the per-unit length impedance is replaced by a set of equivalent current sources via the fictitious medium method. The main advantage of the proposed approach is that it can solve the boundary value problem within the tunnel region. The proposed method can reduce the calculation region and, thus, leads to time savings. A comparison of the numerical results with published data shows very good agreement. The proposed method is a good candidate for impedance calculation of a conductor inside a tunnel.</P>