US 12,631,673 B2 · Measurement apparatus and measurement method

Abstract

A measurement apparatus includes a controller configured to inject an injection current with a second frequency through an insulator into the core wire, to which the voltage to be measured, with a first frequency, is applied, acquire a composite current in which the injection current and a leakage current of the voltage to be measured having leaked out of the core wire through the insulator are superimposed in a circuit unit, calculate, by analyzing the composite current, measured active and reactive powers equivalent to active and reactive powers based on a contribution of the voltage to be measured, calculate the voltage to be measured, based on the measured active and reactive powers, the first and second frequencies, a voltage of the injection current, and a current effective value of the leakage current, and output the calculated voltage to be measured.

Claims10

Dependent claims

A measurement apparatus comprising a controller configured to:

inject an injection current with a second frequency into a core wire through an insulator, a voltage to be measured, with a first frequency, being applied to the core wire;
acquire a composite current that is composed of the injection current and a leakage current of the voltage to be measured having leaked through the insulator;
calculate a measured active power and a measured reactive power based on the composite current, the measured active power and the measured reactive power being equivalent to an active power and a reactive power based on a contribution of the voltage to be measured;
calculate the voltage to be measured, based on the measured active power, the measured reactive power, the first frequency, the second frequency, a voltage of the injection current, and a current effective value of the leakage current;
and
output the voltage to be measured.

3 more elements

A measurement method by a measurement apparatus including a controller, the measurement method comprising:

injecting, by the controller, an injection current with a second frequency into a core wire through an insulator, a voltage to be measured, with a first frequency, being applied to the core wire;
acquiring, by the controller, a composite current that is composed of the injection current and a leakage current of the voltage to be measured having leaked through the insulator;
calculating, by the controller, a measured active power and a measured reactive power based on the composite current, the measured active power and the measured reactive power being equivalent to an active power and a reactive power based on a contribution of the voltage to be measured;
calculating, by the controller, the voltage to be measured, based on the measured active power, the measured reactive power, the first frequency, the second frequency, a voltage of the injection current, and a current effective value of the leakage current;
and
outputting, by the controller, the voltage to be measured.

3 more elements

Dependencies are inferred from the claim text.

Measurement apparatus and measurement method

Life of this patent

Measurement apparatus and measurement method

Life of this patent

Abstract

Claims10