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VestasPower [MW] Vestas’ extended yaw mode: Control feature of Vestas’ yaw system that maintains the yawing functionality of turbines under high wind speeds. Vestas’ yaw system operates in extended yaw mode when the wind speed exceeds the defined value for yaw start, and stops when the wind speed reduces below the defined extended yaw stop value*. Availability of Vestas Yaw Power Backup System: V100-2.0 MW® V110-2.0 MW® V120-2.2 MW™ V117-4.2 MW™ V136-4.2 MW™ V136-4.5 MW™ V150-4.2 MW™ V150-4.5 MW™ V150-6.0 MW™ V162-6.2 MW™ V162-6.8 MW™ *All Vestas wind turbines available for the Vestas Yaw Power Backup System can operate in extended yaw mode using grid power as a standard. The configuration and size of the Vestas Yaw Power Backup sys- tem is country and site dependent, subject to regulation and site conditions. **Vestas does not guarantee full turbine protection by the Vestas Yaw Power Backup System in cut-out events. Extended yaw start wind speed Extended yaw stop wind speed Stop due to high wind Wind speed [m/s] Protecting your wind turbines in case of grid loss Vestas Yaw Power Backup System includes a power backup unit based on a diesel generator, as well as compensation and control equipment. These elements are placed centrally in the wind park to provide electricity to the wind turbines in case of power outage from the grid. In addition, Vestas Yaw Power Backup System includes dedicated control features and wind measurement equipment in the wind turbine. This allows the individual wind turbine to preserve the yawing functionality under unusual conditions. Depending on site conditions and turbine type, the maximum wind speed the turbine can withstand safely after a cut-out event can double with the Vestas Yaw Power Backup System**. Full system integration Vestas Yaw Power Backup System is compatible with Vestas SCADA system and operates as a fully integrated part of the wind power plant. Vestas SCADA system monitors the operations of the Vestas Yaw Power Backup System, and it also enables to control the start and stop of the system if needed. When wind speeds decrease below the defined value for extended yaw mode stop, Vestas SCADA system automatically ceases the extended yaw mode and enables the turbine to re-enter normal operation. In addition, in case alarms have been activated during extended yaw mode operation, these can be acknowledged through Vestas SCADA system to resume regular turbine operation. For more information Learn more on vestas.com. Please contact your local Vestas office for market specific availability and further information. 04/2020 – EN ©Vestas 2021 This document was created by Vestas Wind Systems A/S and contains copyrighted material, trademarks and other proprietary information. All rights reserved. No part of the document may be reproduced or copied in any form or by any means such as graphic, electronic or mechanical, including photocopying, taping or information storage and retrieval systems, without the prior written permission of Vestas Wind Systems A/S. All specifica- tions are for information only and are subject to change without notice. Vestas does not make any representa- tions or extend any warranties, expressed or implied, as to the adequacy or accuracy of this information. Vestas Wind Systems A/S Hedeager 42 . 8200 Aarhus N . Denmark Tlf: +45 9730 0000 . Fax: +45 9730 0001 vestas@vestas.com . vestas.comPage 1