The application discloses a low-rated capacity
transformer identification method, device, equipment and medium, first, the
nameplate capacity value,
transformer short-circuit resistance, short-circuit
reactance per unit value and historical operation data of the target
transformer are acquired. Then, the estimated
capacity value of the target transformer is calculated according to the historical operation data, and the
voltage regulation rate of the target transformer is calculated according to the transformer short-circuit resistance, short-circuit
reactance per unit value and historical operation data. Finally, whether the target transformer has the first low-rated capacity suspicion is judged according to the estimated
capacity value and the
nameplate capacity value, and whether the target transformer has the second low-rated capacity suspicion is judged according to the
voltage regulation rate; if the target transformer has the first low-rated capacity suspicion and the second low-rated capacity suspicion, the target transformer is determined as a low-rated capacity transformer. In summary, the application can realize the automatic screening of the low-rated capacity transformer, and the double suspicion judgment is made by comprehensively considering the
nameplate capacity value, the estimated capacity value and the
voltage regulation rate, and the occurrence of misjudgment is also effectively reduced.