부분방전 측정용 비접촉식 HFCT 센서개발 및특성평가에 관한 연구
A Study on the Development and Characteristics Evaluation of Non-Contact HFCT Sensor for Partial Discharge Measurement
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초록
본 연구에서는 전력설비의 전력선에 탈부착이 용이하도록 전류계(CT) 방식의 비접촉식 부분방전 측정용 센서를 자체 개발하고,그 특성평가 결과에 대하여 논하였다. 자체 제작한 HFCT센서의 주파수 응답특성이 20[kHz]에서 20[MHz]까지 측정 가능함을 보였으며, 정극성 방향으로 배치한 경우의 평균감도가 0.308[mV/pC], 부극성 방향으로 배치한 경우는 0.459[mV/pC]로서 부극성으로배치한 경우가 정극성으로 배치한 경우보다 감도특성이 우수함을 보였다. 실제 부분방전 발생 및 특성측정 실험을 통하여 침전극끝단에서 매우 미소한 코로나 기중방전이 시작되는 펄스 신호를 측정하는 것이 가능하므로 전력설비에서 발생될 수 있는 다양한 형태의 부분방전을 충분히 측정가능할 것으로 판단된다.
Abstract
In this study, the sensor such as current transformer type was developed for measuring non-contact partialdischarge in power electrical facilities, and the results of the characteristic evaluation were discussed. Thefrequency response characteristics of the HFCT sensor were shown to be measurable from 20 [kHz] to 20 [MHz]. The average sensitivity for the positive direction was 0.308 [mV/pC], and the negative direction was 0.459[mV/pC]. Which showed that the sensitivity for the negative direction was better than that for the positivedirection. The developed HFCT sensor is possible to measure very small partial discharge pulse signals and can bemeasured various types of partial discharge that may occur at power electrical facilities.
참고문헌 (11)
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