The Online Calibration System for Transformers Based on Hybrid Convolution Window Technology
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2022-09-07 |
| Journal | 2022 China International Conference on Electricity Distribution (CICED) |
| Authors | Di Chen, Chao Fu, Yue Tong, Yuan Tian |
| Institutions | China Electric Power Research Institute |
| Citations | 1 |
Abstract
Section titled āAbstractāFor the problems that cannot be solved by electronic voltage transformer online calibration, This paper designs a live calibration system with simple operation, high accuracy and flexibility. The use of a standard voltage transformer and a diamond-shaped automatic lifting device to obtain the primary voltage signal, And the voltage is divided by the voltage divider composed of SF6 cylindrical capacitor and precision NPO capacitor to complete the verification, The influences of overvoltage, gas leakage and temperature on the measurement accuracy of standard voltage transformers are analyzed, and it is judged whether they meet the requirements of system accuracy. A four-spectrum line interpolation algorithm based on trapezoidal self-convolution window is designed. This algorithm not only has better side lobe characteristics, but also has better main lobe characteristics than classic triangular windows. The four-spectrum line interpolation algorithm based on the trapezoidal self-convolution window greatly improves the accuracy of data processing. This paper uses the cooperation of virtual instrument LabVIEW and PC to realize the four-spectrum interpolation algorithm of trapezoidal self-convolution window. It is easy to operate, shortens the verification cycle, saves development costs, and has good human-computer interaction and scalability.