용량성 전장센서를 이용한 과도전압측정계 = Transient Voltage Measuring System Using the Capacitive Electric Field Sensor

다국어 초록 (Multilingual Abstract)

This paper deals with the capacitive voltage divider which can measure a transient voltages generated by operating a high voltage impulse generator. The transient voltage measuring system using the capacitive electric field sensor consists of the planar-type electric field sensor having a fast response characteristic and the wide bandwidth voltage follower, and the input impedance of which is extremely high, about 10^(12)Ω. In order to analyze the response characteristics to a step input, the newly developed calibration method is proposed, and the error of voltage dividing ratio associated with set-up condition is investigated. Also the optimal set-up condition that is to be maintained within the range of 0.5 % is taken. From the calibration experiment, the frequency bandwidth of the transient voltage measuring system whose response time to a step input is about 15.8 ns, is from 6.37 Hz to 27.3 141Hz. Therefore it is possible to measure the commercial frequency voltages as well as the transient overvoltages without signal distortions.