US 12,455,327 B2
Transfer learning-based power transformer partial discharge diagnosis
Hongbo Sun, Lexington, MA (US); and Kyeong Jin Kim, Lexington, MA (US)
Assigned to Mitsubishi Electric Research Laboratories, Inc., Cambridge, MA (US)
Filed by Mitsubishi Electric Research Laboratories, Inc., Cambridge, MA (US)
Filed on Dec. 4, 2023, as Appl. No. 18/527,754.
Prior Publication US 2025/0180666 A1, Jun. 5, 2025
Int. Cl. G01R 31/62 (2020.01); G01R 31/08 (2020.01); G06F 18/213 (2023.01); G06F 18/24 (2023.01); H02J 3/00 (2006.01); H02J 3/38 (2006.01)
CPC G01R 31/62 (2020.01) [G01R 31/086 (2013.01); G06F 18/213 (2023.01); G06F 18/24 (2023.01); H02J 3/0012 (2020.01); H02J 3/388 (2020.01); H02J 2203/10 (2020.01); H02J 2203/20 (2020.01)] 21 Claims
OG exemplary drawing
 
1. A system for detecting partial discharge (PD) faults of power transformers in a power distribution network comprising:
a PD signal collection circuit configured to acquire sensor signals measured by sensors arranged in target power transformers, wherein the sensor signals include address data indicative of locations of the transformers;
an input/output (I/O) interface configured to receive the sensor signals from the signal collection circuit;
a memory to store computer-implemented programs including a PD feature extractor, a PD fault type classifier, a PD domain discrepancy discriminator, and a power transformer isolation and maintenance procedure; and
a processor configured to perform instructions of the computer-implemented programs using the sensor signals, wherein steps of the instructions comprise:
extracting, for each of the target power transformers, signal features from the sensor signals by using the PD feature extractor;
identify, if the extracted signal features corresponding to an online transformer among the target power transformers indicate a fault type of the online transformer by using the PD fault classifier trained along with the PD feature extractor and the PD domain discrepancy discriminator to determine PD fault types of the online transformer;
generating and transmitting a power transformer isolation signal, if the sensor signal of the online transformer is greater than a defective threshold and a fault type is identified, to a set of switches relevant to the online transformer to disconnect the online transformer from service, wherein the relevant switches include switches to isolate the online transformer and re-route power supply of customers connected to the online transformer.