The development and the characterization of a resistive-capacitive divider, intended for indoor calibrations and measurements at medium voltage level, are described. A numerical tool is developed and largely used in the design phase to optimize the divider performances with respect to frequency behavior and insulation strength. The divider, with a coupled matching stage, is laboratory characterized both at low and high voltage, taking into account the expected operating conditions. The estimated measurement uncertainty associated with its on-site use as a reference is within 550 ppm for the ratio error and 310 µrad for the phase displacement. Results of the first tests performed in MV/LV substations confirm that it can be effectively used in the calibration of medium voltage measurement transformers.
Development and Use of a Medium Voltage RC Divider for On-Site Calibration / Crotti, Gabriella; Giordano, Domenico; Sardi, Angelo. - (2011), pp. 53-57. (Intervento presentato al convegno IEEE International Workshop on Applied Measurements for Power Systems (AMPS) tenutosi a Aachen, Germany nel September 28-30, 2011).
Development and Use of a Medium Voltage RC Divider for On-Site Calibration
CROTTI, GABRIELLA;GIORDANO, DOMENICO;SARDI, ANGELO
2011
Abstract
The development and the characterization of a resistive-capacitive divider, intended for indoor calibrations and measurements at medium voltage level, are described. A numerical tool is developed and largely used in the design phase to optimize the divider performances with respect to frequency behavior and insulation strength. The divider, with a coupled matching stage, is laboratory characterized both at low and high voltage, taking into account the expected operating conditions. The estimated measurement uncertainty associated with its on-site use as a reference is within 550 ppm for the ratio error and 310 µrad for the phase displacement. Results of the first tests performed in MV/LV substations confirm that it can be effectively used in the calibration of medium voltage measurement transformers.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
