TY - GEN
T1 - Analysis of Accelerated Performance Degradation of Transformer in Thermal-Electrical and Thermal-Humidity Aging Conditions
AU - Feng, Jiayun
AU - Peng, Yu
AU - Xiang, Gang
AU - Zhou, Xunli
AU - Duan, Siliang
AU - Yang, Tao
AU - Yang, Zhiming
AU - Tian, Yanhong
N1 - Publisher Copyright:
© 2025 IEEE.
PY - 2025
Y1 - 2025
N2 - The reliability of DC transformers is crucial for the safety and stability of DC microgrids. Aging of solder joints and insulation materials in high-temperature and high-humidity environments will pose significant risks to the reliability of transformers. This study investigated the aging performance of a specific DC-DC transformer module using step-stress accelerated life tests (SSALT), which offers advantages in sample amount and testing time compared to constant-stress tests. Thermal-electrical SSALT was conducted at 125°C, 150°C and 175°C, and thermal-humidity SSALT was conducted at 85°C, 65%/85%/95% RH. Output voltage deviation was used as the failure criterion. Degradation data achieved from the thermal-electrical and thermal-humidity SSALT were fitted to calculate degradation rates according to Arrhenius model and Eyring model, respectively. Besides, the activation energy and acceleration factor for transformer aging were also calculated accordingly. Life predictions indicated times to parametric drift failure under normal conditions. The results demonstrated the effectiveness of SSALT and the developed models for predicting transformer life under thermal and humid conditions.
AB - The reliability of DC transformers is crucial for the safety and stability of DC microgrids. Aging of solder joints and insulation materials in high-temperature and high-humidity environments will pose significant risks to the reliability of transformers. This study investigated the aging performance of a specific DC-DC transformer module using step-stress accelerated life tests (SSALT), which offers advantages in sample amount and testing time compared to constant-stress tests. Thermal-electrical SSALT was conducted at 125°C, 150°C and 175°C, and thermal-humidity SSALT was conducted at 85°C, 65%/85%/95% RH. Output voltage deviation was used as the failure criterion. Degradation data achieved from the thermal-electrical and thermal-humidity SSALT were fitted to calculate degradation rates according to Arrhenius model and Eyring model, respectively. Besides, the activation energy and acceleration factor for transformer aging were also calculated accordingly. Life predictions indicated times to parametric drift failure under normal conditions. The results demonstrated the effectiveness of SSALT and the developed models for predicting transformer life under thermal and humid conditions.
KW - DC transformer
KW - life prediction
KW - reliability
KW - step-stress accelerated life test(SSALT)
UR - https://www.scopus.com/pages/publications/105033235931
U2 - 10.1109/ICCASIT66611.2025.11348869
DO - 10.1109/ICCASIT66611.2025.11348869
M3 - 会议稿件
AN - SCOPUS:105033235931
T3 - Proceedings of 2025 IEEE 7th International Conference on Civil Aviation Safety and Information Technology, ICCASIT 2025
SP - 321
EP - 326
BT - Proceedings of 2025 IEEE 7th International Conference on Civil Aviation Safety and Information Technology, ICCASIT 2025
A2 - Sun, Huabo
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 7th IEEE International Conference on Civil Aviation Safety and Information Technology, ICCASIT 2025
Y2 - 22 October 2025 through 24 October 2025
ER -