용량성 프로브와 광전송회로를 이용한 광대역 전압측정장치
A Study on the Development of a Lightning Warning System by the Measurement of Electric Field at the Ground
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Abstract
A reliable voltage measurement system is necessary to monitor status of power facilities in substations, which is easy to set up and is not influenced by electromagnetic interference in and around substation. In this paper, we described a voltage measurement system(VMS) which is composed of a capacitive voltage probe, an impedance converter, and an optical linker. To get a wide-band characteristic of the VMS, a high speed impedance convertor was used, and the output impedance of the VMS was set at 50[Ω] to match any types of observing instruments. The frequency bandwidth of the VMS, which was estimated by a step pulse, was ranges from 11.42[Hz] to 13.65[MHz], and the VMS showed a good response characteristic in a high frequency domain such as impulse voltages as well as a commercial frequency voltage.
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