| 摘要 |
PROBLEM TO BE SOLVED: To provide a partial discharge detection method and a partial discharge detection device which are capable of detecting partial discharge generated by applying an impulse voltage to a charging part of an inspection object, by using an acoustic sensor attached to the inspection object.SOLUTION: A partial discharge detection method includes a step of applying a first impulse voltage to a charging part of an inspection object, a step of acquiring a first measurement signal by an acoustic sensor attached to an outer surface of the inspection object, a step of acquiring a second measurement signal by applying a low pass filter to the first measurement signal, and a step of acquiring a third measurement signal by removing a noise component due to mechanical vibration of the inspection object, from the second measurement signal. The noise component is determined on the basis of a fourth measurement signal which is acquired by the acoustic sensor when a second impulse voltage which does not generate partial discharge in the inspection object and is lower than the first impulse voltage is applied to the charging part of the inspection object. |
