Development and application of remote sensing transformer winding deformation tester

The frequency response method testing of power transformers is a basic test project for transformers. In practical operation, this project requires a long test cable to facilitate the introduction of test signals into the testing instrument. At the same time, the response signal of this test can reach a minimum of microvolts. Due to the presence of test cables, the measurement results of small signals are greatly affected by the testing environment, wiring status, and external sudden RF interference. Different results are often obtained from the same measurement, which poses difficulties for correctly analyzing the status of transformers. <br/><br/> We have developed a winding deformation tester based on telemetry technology, which utilizes radio frequency communication technology and integrated high-frequency signal measurement technology. The testing unit can be directly connected to the sleeve, eliminating the influence of the testing line in the experiment. In principle, it achieves one-time wiring and multiple measurements, greatly improving the accuracy and efficiency of the experiment. After trial use on the transformer and comparison with the original test data, good test results have been achieved.