Verfahren, Vorrichtungen und Systeme zur Dynamischen Netzzeigerschätzung

Details

Veröffentlichungs-Nr.

EP4819425

Anmeldetag

31. März 2025

Veröffentlichung

7. Oktober 2026

Rechtsraum

EP

Abstract

The present disclosure relates to a computer-implemented method comprising: estimating a plurality of dynamic phasors x̂_in,k(θ) of a single- or multi-phase input signal x_in(θ), corresponding to an electrical parameter of an electrical power system (EPS), wherein said step of estimating said plurality of dynamic phasors x̂_in,k(θ) comprises: based on information at least indicative of a highest harmonic order of non-negligible dynamic phasors of the input signal x_in(θ), selecting a finite harmonic order k_max equal to or greater than said highest harmonic order of non-negligible dynamic phasors of the input signal x_in(θ), providing a set of matrix representations (x̂, K, d, ŷ, G, I, Γ) based on said input signal x_in(θ) and/or said finite harmonic order k_max, and computing a plurality of matrix operations applied to said set of matrix representations (x̂, K, d, ŷ, G, I, Γ) to provide a corresponding plurality of dynamic phasor estimates x̂_k(θ) (k ∈ {-k_max, ..., k_max}) to said plurality of dynamic phasors x̂_in,k(θ), wherein the plurality of matrix operations represents at least a first step of extracting signals ŷ_k(θ) (k ∈ {-k_max, ..., k_max}) from the input signal x_in(θ) by application of a plurality of lowpass filters, and a second step of applying harmonic cancellation on the signal components y_k(θ) = e^jkθŷ_k(θ), wherein said phase angle θ is controlled via a phase locked loop, PLL, which PLL receives as input at least one component of the plurality of dynamic phasor estimates x̂_k(θ).The present disclosure further relates to a phasor measurement unit, PMU, a monitoring system, a control device, and a power supporting system.

Anmelder

Firma

Hitachi Energy Ltd

Land

🇨🇭 Schweiz