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1. (WO2013120976) METHOD FOR AVOIDING VOLTAGE INSTABILITY IN AN ELECTRICAL GRID OF AN OFFSHORE WIND PARK

Pub. No.:    WO/2013/120976    International Application No.:    PCT/EP2013/053029
Publication Date: Fri Aug 23 01:59:59 CEST 2013 International Filing Date: Fri Feb 15 00:59:59 CET 2013
IPC: H02J 3/24
Applicants: ALSTOM RENOVABLES ESPAÑA, S.L.
Inventors: GOMÍS BELLMUNT, Oriol
ARAGÜÉS PEÑALBA, Mónica
Title: METHOD FOR AVOIDING VOLTAGE INSTABILITY IN AN ELECTRICAL GRID OF AN OFFSHORE WIND PARK
Abstract:
Method for avoiding voltage instability in an electrical grid of an offshore wind park, the offshore wind park electrical grid being connected at a first end of a high voltage alternating current (HVAC) transmission and the main land electrical grid being connected at a second end of the HVAC transmission, each of the wind turbines being connected to the wind park electrical grid, the method comprises determining a main land phase angle at or near the second end of the HVAC transmission; measuring an individual wind turbine phase angle at one or more wind turbines; determining the difference between each of the measured individual wind turbine phase angles and the main land phase angle; and determining whether the difference between one of the measured individual wind turbine phase angle and the main land phase angle exceeds a threshold phase angle difference.