Method for judging and processing operation state of secondary protection equipment of transformer substation

The invention relates to a substation secondary protection equipment operation state judgment and processing method, which comprises the following steps of: establishing classifiers related to an indicator lamp, a pressing plate and an air switch, collecting and marking data samples of the classifiers, and calculating and extracting characteristic values of the classifiers; obtaining a fixed-point picture of the transformer substation protection device, intercepting a candidate recognition region, extracting a feature value of the candidate region through calculation, obtaining the confidence coefficient of the candidate recognition region, removing the region with the low confidence coefficient, and outputting the results of an indicator lamp, a pressing plate and an air switch on the transformer substation protection device. And judging a line operation mode according to the output indicating lamp, pressing plate and air switch results so as to judge whether the pressing plate is normally switched on or off