Modeling and Structure Optimization of Acoustic Imaging Sensor Unit for Partial Discharge Detection of Electrical Equipment

In the process of power transfer, the load borne by the substation equipment is very high. In this process, the insulation facilities will not only be directly affected by electricity and heat, but also gradually weakened under the influence of many other factors, resulting in partial discharge. A short partial discharge will not have much effect, but if a persistent discharge occurs, the insulation performance of the device will be rapidly degraded, and eventually the entire insulation will be broken down. The acoustic imaging technique can detect the abnormal sound produced by partial discharge in electrical equipment. But the effect depends on the array. In this paper, the array is modeled, the influence of sensor number, aperture and other factors on detection is analyzed, and the array is optimized.