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최소 단어 이상 선택하여야 합니다.
최소 단어 이상 선택하여야 합니다.
선택한 단어 수는 30입니다.
최대 10 단어까지만 선택 가능합니다.
최대 10 단어까지만 선택 가능합니다.
제안 방법
- UHF PD signals from the sensor were amplified using a 20dB gain, 100 ~ 2000MHz amplifier and recorded using a commercial spectrum analyzer (Anritsu MS2721A). After a PD data measurement completes, analysis based on the phase resolved PD pattern was processed to distinguish the PD sources (protrusion, free moving particle, floating electrode, insulator defect and noise).
- waves. For this, after insert artificial defect into the mock-up switchgear, generate PD pulse of 10pC, 20pC and 50pC as test voltage is adjusted. And UHF PD signal was detected at frequency bands of 610~630, 1150~1170 and 1300~1320 MHz.
대상 데이터
- In this work, we developed two type UHF sensors. One is the internal type UHF sensor mounted on the MV switchgear enclosure as manufacturing process.
- To detect the electromagnetic waves excited somewhere inside the MV switchgear, the internal and the external type UHF PD sensor were used. And using handheld spectrum analyzer, the detected PD signals were analyzed in frequency domain.
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