Bibliographic Details
| Title: |
Multi-Physics Coupling Analysis of Vibration and Noise Abnormalities in Transformer under Geomagnetically Induced Current. |
| Authors: |
Chao Pan1, Chuanhui Wang1 1249593929@qq.com, Tongrui Fu1, Shoukun Zou1 |
| Source: |
Progress in Electromagnetics Research B. 2025, Vol. 112, p43-59. 17p. |
| Subjects: |
Power transformers, Earth currents, Mechanical vibration research, Simulation methods & models, Electric power system stability |
| Abstract: |
Focusing on the instability problems of power grid transformer caused by geomagnetically induced current (GIC), this paper investigates the multi-physics coupling characteristics of a transformer under GIC. First, the propagation path of GIC is analyzed, and the variation characteristics are further studied based on measurement data. The variational signatures can be characterized by two key parameters: GIC distortion rate (Δk) and distortion time (tτ). A multi-physics coupling model considering GIC distortion is proposed, which includes mechanical domain coupling between electromagnetic and acoustic domains. Simulations are conducted on a three-phase transformer under varying conditions of Δk, tτ, and load factor (η). Then, the spatial-temporal variations of winding current, magnetic leakage, core vibration acceleration, and noise can be analyzed. Results reveal that vibration and noise exhibit abnormal intensification under GIC interference. Meanwhile, dynamic experimental platform is established. And the result is verified through consistency of virtual model and physical entity. On this basis, a nonlinear mapping relationship between Δk and sound pressure level (Lp) is established. Finally, a stability criterion is developed to represent anomalies in terms of thresholds, providing a foundation for situational awareness and full lifecycle management of grid equipment under GIC interference. [ABSTRACT FROM AUTHOR] |
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| Database: |
Engineering Source |
