论文信息 - Measurements and correction of no-load losses of power transformers

Measurements and correction of no-load losses of power transformers

This paper investigates the practice of correcting the results of no-load loss measurements of power transformers for the effect of distorted supply voltage waveform. A three-phase 700-MVA power transformer is tested twice: first with its low-voltage windings connected line-to-neutral, with nearly sinusoidal test voltage conditions, and then for the second test with its windings connected line-to-line with more distorted voltage waveforms. The test data obtained during the measurement was reproduced at the National Research Council (NRC) Laboratory to demonstrate the limits of the application of the loss correction formula currently used.

E. So | E. Hanique | R. Arseneau

[1] R. Arseneau,et al. An improved three phase digital recorder system for calibrating power instrumentation , 1996, Proceedings of 20th Biennial Conference on Precision Electromagnetic Measurements.

[2] P.S. Filipski. A TDM wattmeter with 0.5 MHz carrier frequency , 1989, 6th IEEE Conference Record., Instrumentation and Measurement Technology Conference.

[3] P. S. Filipski,et al. A calibration system for evaluating the performance of harmonic power analyzers , 1995 .

[4] Eddy So,et al. No-load loss measurements of power transformers under distorted supply voltage waveform conditions , 2002, CPEM 2002.

[5] Eddy So. The Application of the Current Comparator in Instrumentation for High Voltage Power Measurements at Very Low Power Factors , 1986, IEEE Transactions on Power Delivery.

[6] Rejean Arseneau,et al. A Comparison of Instrumentation for Measuring the Losses of Large Power Transformers , 1983, IEEE Power Engineering Review.