METHOD FOR MEASURING THE REAL AND IMAGINARY COMPONENTS OF ALTERNATING VOLTAGE Russian patent published in 2022 - IPC G01R19/00 

FIELD: measuring technology.

SUBSTANCE: method relates to electrical measurements and can be used to accurately measure the real and imaginary components of alternating voltage. The method for measuring the real and imaginary components of alternating voltage consists in the fact that the measured voltage is applied to the inverting input of the adder, the compensating voltage is applied to the non-inverting input of the adder, the difference signal is amplified with an extremely high gain, resulting in rectangular pulses or a sequence of logical signals that process and isolate the fundamental harmonic. The signs (+ or –) of the real and imaginary components of the fundamental harmonic are distinguished. Analyzing these signs, the steps of the iterative sequence of the method for midpoints are implemented. The midpoint method is a two-dimensional analogue of the half division method. The steps are performed until the specified accuracy is reached. The method makes it possible to find a compensating alternating voltage as close as possible to the measured alternating voltage. At the end of the iterative sequence, the next point s is considered to be the found value. The real component Re(s) corresponds to the real component of the measured current, and the imaginary component Im(s) corresponds to the imaginary component of the measured current.

EFFECT: implementation of the claimed solution provides an increase in accuracy, resolution and sensitivity, a reduction in the measurement error of the real and imaginary components of alternating voltage, an increase in the reliability of the device implementing the method.

1 cl, 8 dwg