배전선로에서의 조가선 차폐 효과 연구

A Study on a Shielding Effect of the Messenger Wires in Distribution Lines

  • 김인수 ;
  • 한웅 (성균관대 정보통신공학부) ;
  • 여상민 (성균관대 정보통신공학부) ;
  • 김철환 (성균관대 정보통신공학부) ;
  • 원봉주 (전력IT추진 통신계획팀 전력유도담당) ;
  • 임용훈 (한전전력연구원 연구지원실)
  • 발행 : 2009.03.01

초록

As the telecommunication lines bring into widespread use, one of the most important aspects related to power distribution systems is effectively to evaluate the effect on the telecommunication lines from power lines. One of the efficient methods to evaluate the effect is to measure the induced voltage of a telecommunication line as a result of a ground-loop. If the power lines cause high induced voltage, the ground reference in the telecommunication lines is no longer a stable potential, so signals may ride on the noise. A ground loop is common wiring conditions where a ground current may take more than one path to return to the grounding electrode at the arrangement between the power lines and telecommunication lines. When a multi-path connection between the power lines and telecommunication line circuits exists, the resulting arrangement is known as a ground loop. Whenever a ground loop exists, there are potential for damages or abnormal operations of the telecommunication lines. The power lines can induce the voltage on the communication line. The effects can be calculated by considering the inductances and capacitances. However, if we assume that there are only power lines, it doesn't have a practical meaning because there are conductors with other purpose in the neighborhood of the lines. If we consider that case, we need more complex system. Therefore we suggest more complex system considering the conductors with other purpose in the neighborhood of the lines. The neutral wires and the overhead ground wires are considered for calculating the induced voltage. We assume that there are the messenger wires beside the power line as a result of increased use of them. The main purpose of this paper is a study on a shielding effect of messenger wires in the distribution lines. EMTP(Electro-Magnetic Transients Program) program is used for the induced voltage calculation.

키워드

참고문헌

  1. 전자통신동향분석, '통신선에 대한 전력유도장해발생 근접규격 분석(Analysis on the Distance Specification for Inducing Voltage to Telecommunication Line by Power Line)', 제18권 제2호 2003년 4월
  2. 오호석, '차폐선 활용방안 연구', 한국통신 가입자망연구소
  3. 명노훈, '통신선의 차폐계수 산정', 전자파기술학회지, 제4권 3호, pp.82, 1993년 9월