Automatic calibration system and method for passive low-power voltage transformer
AssigneeG & W Electric Company
InventorsElisa Scala, Andrea Nalli, Simone Pezzolato
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Abstract
Systems and methods for calibrating a low-power voltage transformer (LPVT). Systems include a capacitive voltage divider and a variable capacitance device connected to the capacitive voltage divider. A parameter of the variable capacitance device is adjusted to minimize the ratio error of the LPVT. Methods include connecting a variable capacitance device to a capacitive voltage divider of the LPVT system, measuring a ratio error of the LPVT system based on an output of the variable capacitance device, and adjusting a parameter of the variable capacitance device.
Claims18
A system for calibrating a low-power voltage transformer (LPVT), the system comprising:
- a capacitive voltage divider;
- and
- a variable capacitance device connected to the capacitive voltage divider;
- wherein a parameter of the variable capacitance device is adjusted to minimize the ratio error of the LPVT,
- wherein the capacitive voltage divider is a stand-alone capacitive voltage divider or is an embedded capacitive voltage divider.
A method of calibrating a low-power voltage transformer (LPVT) system, the method comprising:
- connecting a variable capacitance device to a capacitive voltage divider of the LPVT system;
- measuring a ratio error of the LPVT system based on an output of the variable capacitance device;
- and
- adjusting a parameter of the variable capacitance device wherein the capacitive voltage divider is a stand-alone capacitive voltage divider or is an embedded capacitive voltage divider.
Dependencies are inferred from the claim text.