METHOD OF HARMONIC SIGNALS DISTORTION PARAMETERS DETERMINING (VERSIONS) Russian patent published in 2017 - IPC G01R31/327 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering, in particular, to technologies, using electric equipment, installed on electric power plants and substations in systems of production, transmission and consumption of power, and can be used in all electrical installations using digital data processing. Method of harmonic signals distortion parameters determining, in which establishing additive aperiodic component harmonic signals distortion decreasing type and calculating constant component value in signals. To determine signal A_a additive aperiodic component initial value and signal τ_a aperiodic component damping time constant continuously N times during period T and in each current moment in time t_i, i=1, 2, …, N, measuring and recording signal x(t_i) instantaneous values, and calculating signal A_a additive aperiodic component values, signal τ_a aperiodic component damping time constant by signal instantaneous values two consecutive measurements x(t_i) and x(t_i-1) according to following mathematical expressions:

where A_a is additive aperiodic component initial value, signal unit: for voltage are volts, V, for current are amperes, A; τ_a is signal additive aperiodic component damping time, s, x(t_i) is measured signal current value at moment of time t_(i), signal measurement unit; x(t_i-1) is same signal previous value at moment of time t_i-1, signal measurement unit; X_INT is signal constant component, signal measurement unit; k_i=X_m⋅sin(ωt_i) – harmonic signal value at moment of time t_(i), signal measurement unit; k_i-1=X_msin(ωt_i-1) – harmonic signal value at moment of time t_i-1, signal measurement unit; X_m is harmonic signal amplitude value, signal measurement unit, V or A.

EFFECT: technical result consists in simplification of currents and/or voltages measuring method.

2 cl, 2 dwg, 1 tbl