685 / 2022-03-31 14:47:55

On-line monitoring of CVT measurement errors based on independent component analysis

CVT; ICA; measurement error; online monitoring

Realize the online monitoring of CVT measurement error, and overcome the difficulties of power failure and difficult operation during the regular offline detection process.


The CVT secondary output amplitude data is correlated under normal operation. The correlation analysis is performed on the data based on ICA, and a new comparison standard quantity is established without the standard transformer. The measurement error information is quantified, and the online monitoring of CVT measurement error is realized by comparing the quantized values.


Simulation experiments show that the measurement error on-line monitoring method meets the accuracy requirements of grade 0.2, and the assessable amplitude change is better than 0.35%.


It meets the requirements of 0.2-level accuracy, and the evaluable amplitude change is better than 0.35%. The measurement accuracy of its operation is of great significance to the safe and economic operation of the power system.