METHOD FOR ESTIMATING A VOLTAGE AND DEVICE ENABLING SUCH AN ESTIMATION

摘要

A method of estimating a periodic voltage, such as an input voltage, of one of the phases of an electrical circuit with at least two phases including a voltage sensor for each of its phases, each voltage sensor being capable of outputting a signal representative of at least a part of period of the periodic voltage of the phase. The method including the following steps: measure the representative signal starting from the voltage sensor; amplify the representative signal by a gain determined in the absence of an electrical fault in the circuit and based on a reference voltage common to all phases in the electrical circuit (1); use the amplified representative signal to estimate the periodic voltage. A device for estimating a voltage and an electrical circuit including such a device.

主权项

1. A method of estimating a periodic voltage, such as an input voltage, the periodic voltage being one of the phases of an electrical circuit with at least two phases, the electrical circuit comprising a voltage sensor for each of its phases, each voltage sensor being capable of outputting a signal representative of at least a part of period of the periodic voltage of said phase, the method comprising the following steps:
measuring the representative signal representative of at least a portion of a period of the periodic voltage of the phase using the voltage sensor, amplifying the representative signal by a gain determined in the absence of an electrical fault in the electrical circuit and based on a reference voltage common to all phases in the electrical circuit, using the amplified representative signal to estimate the periodic voltage.