Development of Deterioration Diagnosis System for Aged ACSR-OC Conductors in HV Overhead Distribution Lines

고압 가공배전선의 노화된 ACSR-OC 도체에 대한 열화진단시스템 개발

  • 김성덕 (정회원, 대전산업대학교 전기·전자공학부) ;
  • 이승호 (정회원, 대전산업대학교 전기·전자공학부)
  • Published : 2000.11.01

Abstract

Design and experiments of a nondestructive testing system with a solenoid eddy current sensor to inspect deterioration of ASCR-OC (ACSR Outdoor Cross-linked Polyethylene Insulated Wires) usually used in HV overhead distribution lines in domestic areas in presented in this paper. Through corrosion mechanisms and deterioration results for ACSR-OC conductors are examined, it is shown that corrosion may lead to the reduction of the effective cross section area of conductors is proposed. The measurement system consisting of a constant current source with a RF frequency, a signal processing unit and a motor driver/ controller is designed and implemented. This instrument has such capabilities as detecting the sensor output and estimating diameter change of the testing conductors, continuously. As a result, it was verified that such corrosion detector system with an eddy current sensor can be shown good effectiveness for estimating the serious faults due to deterioration in overhead distribution lines and giving an early warming before severe aged conductor may lead to fail.

본 논문에서는 국내의 고압 가공배전선으로 일반적으로 사용되는 ACSR-OC의 열회를 검출하기 위하여, 솔레 노아드 와류센서를 가진 비파괴 검사시스템의 설계와 실험을 다루었다. ACSR-OC 도체에 대한 부식기구와 열회 상태를 검토하므로써, 부식이 도채의 유효단면적을 감소시키는 것을 확인하였다. 노화도체의 극심한 부적정도룹 검출하고 정량화하기 위한 실용적인 전기.자기적인 방법올 제시하였다. 고주파 정전류원, 신호처리 부와 모터 구동/제어기로 구생되눈 계측시스템이 설계되고 시험되었다. 이 장치는 센서의 출력을 검출하고 검사도체의 직경변화를 연속적으로 추정하는 기능을 갖고 있다. 그 결과, 와류센서를 가진 부각검출시스템은 가공 재전선의 열화에 기인한 심각한 결함을 추정하고 극심한 노호도체가 단선되기 전에 사전 경고를 하는데 양호한 효용성을 나타내는 것을 확인하였다.

Keywords

References

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