Szczegóły publikacji
Opis bibliograficzny
A new method for noninvasive measurement of grid harmonic impedance with data selection / Dariusz BORKOWSKI // International Transactions on Electrical Energy Systems [Dokument elektroniczny]. - Czasopismo elektroniczne ; ISSN 2050-7038. — 2015 — vol. 25 iss. 12, s. 3772–3791. — Bibliogr. s. 3789–3791, Summ. — Publikacja dostępna online od: 2015-03-05
Autor
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 95243 |
|---|---|
| Data dodania do BaDAP | 2016-01-20 |
| Tekst źródłowy | URL |
| DOI | 10.1002/etep.2068 |
| Rok publikacji | 2015 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | International Transactions on Electrical Energy Systems |
Abstract
The paper presents a new, noninvasive method for the measurement of power grid harmonic impedance. The method is a robust variant of transfer function estimation method. Its novelty lays in the way of selecting local harmonic impedance estimates for averaging, based on input–output coherence estimates, which immunizes it against background voltage variations. The method is validated by simulation including varying background voltage harmonics, both for fixed and slowly varying harmonic impedance. It has also been tested with noisy and nonsynchronously sampled signals. The method is compared with another noninvasive method with data selection. Simulation results clearly show that the proposed method returns lower estimation errors. Also, its computational complexity is significantly reduced compared with the reference one. The presented results of a field test conducted at medium-voltage/low-voltage substation prove that the method works well in real conditions.