Transformer winding deformation tester has two test methods: frequency response method and low voltage short-circuit impedance method. Two different methods are used to measure the winding of power transformer, which fully reflects the winding characteristics of the transformer and more accurately analyzes and diagnoses the winding deformation. The frequency response method and the impedance method are perfectly combined to save test time and improve work efficiency. According to the measurement of the characteristic parameters of the internal winding of the transformer, the transformer winding deformation tester adopts the internal fault frequency response analysis (FRA) method developed by developed countries, which can make an accurate judgment on the internal fault of the transformer. PUR Barrel 55-Gal Hot Melt Adhesive Machine Pur Barrel 55-Gal Hot Melt Adhesive Machine,Pur Barrel 5 Gal,Pur Hot Glue Machine,Adhesive Viscosities Machine Wahrheit Automation & Trading Co., Ltd. , https://www.wahrheitcn.com
After the transformer is designed and manufactured, its coil and internal structure are determined. Therefore, for a multi-winding transformer coil, if the voltage level is the same and the winding method is the same, the corresponding parameters (Ci, Li) of each coil should be It is ok. Therefore, the frequency domain characteristic response of each coil is also determined, and the frequency spectrum of the corresponding three-phase coils is comparable.
During the test, the transformer is inter-turned, phase-to-phase short-circuited, or collided during transportation, causing relative displacement of the coil, and deformation of the coil due to electromagnetic tension during short-circuit and fault conditions during operation, which will cause distribution parameters of the transformer winding. A change has occurred. In turn, it affects and changes the original frequency domain characteristics of the transformer, that is, the frequency response amplitude change and the resonance frequency offset. And the transformer winding tester developed according to the response analysis method is such a novel non-destructive testing device for internal faults of the transformer. It is suitable for internal structure fault detection of 63kV ~ 500kV power transformers.
The instrument quantifies the response variation of the internal winding parameters of the transformer in different frequency domains, and determines the degree of variation of the internal winding of the transformer according to the magnitude of the variation, the magnitude of the frequency response change, and the trend of the regional and frequency response. According to the measurement result, it can be judged whether the transformer has been seriously damaged and whether overhaul is required.
For the running transformer, no matter whether the frequency domain characteristic map is saved in the past, the degree of fault can be judged by comparing the difference of the characteristic map between the coils of the faulty transformer. Of course, if the original winding characteristic map of the transformer is saved, it is easier to provide a more accurate and powerful basis for the operation of the transformer, post-accident analysis and maintenance.