| Title |
A Consideration on 3-Phase Non-Loop, Multiple-Point Ground Method in 22.9[㎸] CNCV Underground Cable Systems |
| Authors |
Myung-Su Jeon ; Joong-Ho Song |
| Keywords |
Corculatlng current in co-axial neutral lines of distribution cables ; Multlple-point ground ; Non-loop multiple-point ground ; Induction interference ; Tolerant Current of cables |
| Abstract |
In 22.9[㎸]-y distribution systems, underground cables are provided with 3-wire loop multiple-point ground in which each coaxial-neutral line of the distribution cable lines(A, B, C phases) is 3-wire common grounded at every connecting section. In the underground cable distribution systems, circulating current flows in the coaxial-neutral lines and its magnitude amounts to about 40~50[%] load currents, even though loads are balanced. This paper presents a new ground method to overcome such a problem and a comprehensive analysis in terms of current capacity of power cables, induced voltage of cable sheath, and electromagnetic interference voltage from power cable lines. |