Transformer winding deformation tester is a professional power detection equipment, mainly used to detect whether the windings of power transformers and other special-purpose transformers have deformed. This equipment follows national power industry standards, such as DL/T911-2004, and determines whether the windings have deformed due to various reasons (such as short-circuit current impact, physical impact, mechanical stress during long-term operation, etc.) by analyzing the amplitude-frequency response characteristics of the transformer windings.
Working Principle and Functional Features:
Amplitude-Frequency Response Analysis: The tester applies a specific excitation signal (usually a sine wave voltage with adjustable frequency) to the transformer and measures the response of the windings. By analyzing the frequency response characteristics of the windings, it can determine whether there are structural changes in the windings.
Longitudinal and Transverse Comparison: Compare the test results with factory test data or historical data to determine the degree and nature of winding deformation. Longitudinal comparison involves comparing test results of the same transformer at different times, while transverse comparison involves comparing with standards or reference data of similar types of transformers.
FRA (Frequency Response Analysis) Method: Adopts the internal fault frequency response analysis method, which is an internationally recognized non-destructive testing technique that can accurately determine internal fault conditions of transformers, including winding distortion, displacement, and other deformation issues.
Comprehensive Analysis: Combine the structural characteristics of the transformer, operating history, and other test results (such as oil chromatographic analysis , insulation resistance testing, dielectric loss testing, etc.) to conduct a comprehensive assessment of winding deformation.
Safety and Convenience: Modern winding deformation testers are usually designed to be portable, convenient for on-site operation, and have a high level of safety protection to ensure the safety of test personnel and equipment.
Application Scenarios:
Preventive Maintenance: Regularly test transformers in operation to detect winding deformation issues early and prevent faults.
Fault Diagnosis: When transformers show abnormalities, such as local overheating or abnormal sounds, use the tester to assist in diagnosing the cause of the fault.
Post-Accident Assessment: After a transformer experiences short-circuit current impact or external force damage, conduct tests to assess the degree of winding damage.
In summary, the transformer winding deformation tester is an indispensable tool in power system maintenance and is of great significance for ensuring the stability and safety of power grid operation.
