Abnormality diagnosing system and method for a high voltage power apparatus

An abnormality diagnosing system for a high-voltage power apparatus comprising:

• means for detecting an oscillation signal from the high-voltage power apparatus, said oscillation signal detecting means includes an acceleration sensor for detecting frequency of a low frequency sound level and an acoustic sensor for detecting a high frequency sound level higher than that of the acceleration sensor;
• means for analyzing the frequency components of the detected oscillation signal from said oscillation signal detecting means and generating a frequency spectrum indicative of spectral intensity to frequency;
• and
• means for determining at least one type of abnormality of the high-voltage power apparatus on the basis of the frequency spectrum from said frequency analyzing means and for outputting at least one type of abnormality signal in accordance therewith.

An abnormality diagnosing system for a high-voltage power apparatus

• means for detecting an oscillation signal from the high-voltage power apparatus, said oscillation signal detecting means including a first sensor for detecting a frequency below 400 MHz and a second sensor for detecting a frequency between 500 MHz to 1500 MHz;
• means for analyzing the frequency components of the detected oscillation signal from said oscillation signal detecting means and generating a frequency spectrum indicative of spectral intensity to frequency;
• and
• means for determining at least one type of abnormality of the high-voltage power apparatus on the basis of the frequency spectrum from said frequency analyzing means and for outputting at least one type of abnormality signal in accordance therewith.

An abnormality diagnosing system for a high-voltage power apparatus comprising:

• means for detecting an oscillation signal from the high-voltage power apparatus, said oscillation signal detecting means including an acceleration sensor detecting a frequency of a low frequency sound level and an acoustic sensor for detecting a high frequency sound level higher than that of the acceleration sensor;
• means for analyzing frequency components of the detected oscillation signal from said oscillation signal detecting means and generating a frequency spectrum indicative of spectral intensity to frequency;
• and
• means for determining at least one type of abnormality of the high-voltage power apparatus on the basis of the frequency spectrum from said frequency analyzing means and outputting at least one type of abnormality signal in accordance therewith, said abnormality determining means further determining a type of abnormality on the basis of factors including a proportion of low frequency component to high frequency component of the detected sound.