Evaluation of Uncertainty in the Calibration Measurement Results of Power Voltage Transformers
Power voltage transformer is a conversion device installed in the power system for metering and measuring power frequency voltage signals.It converts a high voltage signal into a standard secondary signal,providing standard voltage signals to measuring devices,protection devices,and metering devices.Because power voltage transformers involve accurate measurement of electrical energy,their conversion accuracy is very important.According to JJG1189.4-2022"Measurement Transformers Part 3:Verification Regulations for Power Voltage Transformers",this article uses the method of simulating and comparing standard transformers and tested power voltage transformers to measure the ratio difference and phase difference of the tested power voltage transformers,and evaluates the uncertainty based on the measurement results.
power voltage transformersimulation comparison methoduncertainty assessment
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