EP 3818384 A1 20210512 - WIND ENERGY SYSTEM AND METHOD FOR IDENTIFYING LOW-FREQUENCY OSCILLATIONS IN AN ELECTRICAL SUPPLY NETWORK
Title (en)
WIND ENERGY SYSTEM AND METHOD FOR IDENTIFYING LOW-FREQUENCY OSCILLATIONS IN AN ELECTRICAL SUPPLY NETWORK
Title (de)
WINDENERGIESYSTEM UND VERFAHREN ZUM ERKENNEN NIEDERFREQUENTER SCHWINGUNGEN IN EINEM ELEKTRISCHEN VERSORGUNGSNETZ
Title (fr)
SYSTÈME ÉOLIEN ET PROCÉDÉ POUR DÉTECTER DES OSCILLATIONS DE BASSE FRÉQUENCE DANS UN RÉSEAU D'ALIMENTATION ÉLECTRIQUE
Publication
Application
Priority
- DE 102018116446 A 20180706
- EP 2019068107 W 20190705
Abstract (en)
[origin: WO2020008036A1] The invention relates to a method for identifying low-frequency oscillations, in particular subsynchronous resonances, in an electrical supply network (510), wherein the electrical supply network (510) has a network voltage with a nominal network frequency, comprising the following steps: detecting at least one electrical signal of the electrical supply network (510) as at least one test signal and filtering and/or transforming the at least one detected test signal into at least one analysis signal, deriving the at least one analysis signal with respect to time or calculating the difference between temporally spaced values of the analysis signal, in order to obtain a gradient signal in each case, identifying the presence of a low-frequency oscillation if the gradient signal or at least one of the gradient signals satisfies a predefined analysis criterion, in particular that at least one predefined analysis limit is exceeded.
IPC 8 full level
G01R 19/25 (2006.01); G01R 23/02 (2006.01); H02J 3/24 (2006.01); H02J 3/38 (2006.01)
CPC (source: EP US)
G01R 19/2513 (2013.01 - EP); G01R 23/177 (2013.01 - EP); G05B 15/02 (2013.01 - US); H02J 3/381 (2013.01 - EP US); H02J 3/241 (2020.01 - EP US); H02J 3/46 (2013.01 - EP US); H02J 2300/28 (2020.01 - EP US); Y02E 10/76 (2013.01 - EP)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2020008036 A1 20200109; CA 3105412 A1 20200109; CA 3105412 C 20231128; CN 112384813 A 20210219; DE 102018116446 A1 20200109; EP 3818384 A1 20210512; US 11658490 B2 20230523; US 2021159705 A1 20210527
DOCDB simple family (application)
EP 2019068107 W 20190705; CA 3105412 A 20190705; CN 201980045318 A 20190705; DE 102018116446 A 20180706; EP 19737082 A 20190705; US 201917258130 A 20190705