Coupling Capacitor Voltage Transformer: A Device to Correct its Secondary Voltage in Real Time

[摘要] Usually, the secondary voltage of a Coupling Capacitor Voltage Transformer (CCVT) is not a perfect replica of its primary voltage. In this study, the steps to design a hardware capable of performing the correction of the CCVT secondary voltage is presented. The device is basically a recursive digital filter whose parameters are obtained from the CCVT frequency response. The evaluation of the device is made by connecting it to the Real Time Digital Simulator ((ext{ RTDS }^mathrm{TM})) and carrying out real time simulations for two case studies: harmonic distortion and short-circuit in a 230 kV system. It is shown that the hardware device brings the CCVT secondary voltage waveform close to the primary voltage signal...

[学科分类] 自动化工程

[关键词] Coupling capacitor voltage transformer ;Real time simulations ;Digital signal processing ;Electromagnetic transients