http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Surge Analysis on a Long Underground Cable System
Kawamura, Kazuki,Ametani, Akihiro,Gudmundsdottir, Unnur Stella The Korean Institute of Electrical Engineers 2013 The Journal of International Council on Electrical Vol.3 No.2
This paper investigates a basic characteristic of fault surge in a long cable system based on EMTP simulations. It is made clear from the simulation results that the sheath over-voltage is higher on a cross-bonded cable than that on a normal-bonded cable. Also, a resonant overvoltage appears when cables with shunt reactors are disconnected. It becomes clear that the period of the beat becomes long as the compensation rate increases. From simulations with earth continuity conductor (ECC), the ECC is effective to reduce an overvoltage in the case of a fault at an overhead line connected to the cable.
Yutthagowith, Peerawut,Ametani, Akihiro,Nagaoka, Naoto,Baba, Yoshihiro The Korean Institute of Electrical Engineers 2011 The Journal of International Council on Electrical Vol.1 No.4
This paper presents tower surge response calculations on an actual transmission tower including ground wires and phase wires. A frequency-domain partial element equivalent circuit (PEEC) method is applied as a simulation tool. Insulator voltages calculated by the voltage difference of crossarms and phase wires are compared with experimental results collected from the literature. In addition, a transmission line (TL) model is adopted with the PEEC method to increase efficiency for transient surge calculation. The results calculated by the PEEC method with and without the TL model agree well with the experimental results not only for amplitudes but also for waveshapes.