Fault diagnosis apparatus based on fluorescence multivariate correction analysis of transformer oil

A fault diagnosis apparatus based on fluorescence multivariate correction analysis of transformer oil, the fault diagnosis apparatus comprising:

• an apparatus housing, an oil extraction apparatus, a fluorescence excitation source, a fluorescence excitation detection apparatus, a fluorescence signal acquisition and analysis apparatus, and a display screen, wherein the oil extraction apparatus, the fluorescence excitation source, the fluorescence excitation detection apparatus, and the fluorescence signal acquisition and analysis apparatus are disposed inside the apparatus housing, and the display screen is disposed on a front panel of the apparatus housing;
• wherein the oil extraction apparatus is sealedly connected to the fluorescence excitation detection apparatus and an external transformer oil tank respectively through pipelines, the fluorescence excitation source is connected to the fluorescence excitation detection apparatus through an optical fiber, and the fluorescence excitation detection apparatus is connected to the fluorescence signal acquisition and analysis apparatus through an optical fiber;
• wherein the oil extraction apparatus comprises an air pump and an oil inlet valve;
• the air pump is configured to extract impurity gas in an internal pipeline of the oil extraction apparatus and impurity gas in a detection cell of the fluorescence excitation detection apparatus;
• and the oil inlet valve is configured to control an on-state of a flow of the transformer oil from the transformer oil tank into the detection cell of the fluorescence excitation detection apparatus, which is driven by a pressure difference between an oil outlet of the transformer oil tank and the evacuated detection cell;
• wherein the fluorescence excitation source comprises a monochromatic optimal wavelength light-emitting diode (LED) excitation light source, the monochromatic optimal wavelength LED excitation light source is configured to emit monochromatic excitation light having an optimal excitation wavelength, and the monochromatic excitation light is used for exciting the transformer oil in the fluorescence excitation detection apparatus to generate fluorescence;
• wherein the fluorescence excitation detection apparatus is configured to generate the fluorescence by exciting the transformer oil with the input monochromatic excitation light, and to input the fluorescence into the fluorescence signal acquisition and analysis apparatus;
• wherein the fluorescence signal acquisition and analysis apparatus comprises a multivariate correction filter group, the multivariate correction filter group is configured to acquire a fluorescence signal emitted by the transformer oil and to perform hardwareization on a multivariate linear regression correction coefficient vector for calculating a concentration of an aromatic hydrocarbon compound, wherein the multivariate linear regression correction coefficient vector for calculating the concentration of the aromatic hydrocarbon compound is c=a1s1+a2s2+ . . . +ansn+b, where c denotes the concentration of the aromatic hydrocarbon compound, a1 to an denote regression correction coefficients of fluorescence spectra obtained at a 1st to nth bands, s1 to sn denote the fluorescence spectra obtained at the 1st to nth bands, and b denotes a biasing coefficient, and the fluorescence signal acquisition and analysis apparatus is configured to analyze a type of failure of a transformer based on a result of the hardwareization;
• and
• wherein the display screen is configured to display a result acquired and analyzed by the fluorescence signal acquisition and analysis apparatus.