http://nozebra.ipapercms.dk/Vestas/Communication/Productbrochure/TurbineOptions/VestasShadowDetectionSystem/RSS.ashxVestas PagesMon, 07 May 2012 14:43:38 +0200http://nozebra.ipapercms.dk/Vestas/Communication/Productbrochure/TurbineOptions/VestasShadowDetectionSystem/http://nozebra.ipapercms.dk/Vestas/Communication/Productbrochure/TurbineOptions/VestasShadowDetectionSystem/?Page=1http://nozebra.ipapercms.dk/Vestas/Communication/Productbrochure/TurbineOptions/VestasShadowDetectionSystem/?Page=1Green light for green energy At Vestas, the future is green. We believe sustainable energy sources – wind power in particular – will dominate the energy market in place of fossil fuels. This means increasing the public acceptance of turbines, a task best achieved by winning the hearts and minds of communities. Shadow flicker – the effect caused by the sun shining through the rotating blades of a turbine – is one of the drawbacks of locating a wind farm near houses. In fact, shadow flicker can sometimes dictate whether planning permission is granted or not. By equipping our turbines with Vestas Shadow Detection System, we can open up more areas for wind farm investment. And that means more opportunities for investors to profit from harvesting wind energy. Your benefits at a glance: · Higher chance of planning permission · Greater community acceptance of wind farms · Economical to install and maintain · Reliable, proven technology · Suitable for a range of turbines and environments Product Availability: VSDS is available across a range of turbines and is a reliable and effective option for Vestas turbines with: · Free IO signals · VMP global software platform Farewell to the flicker In response to this, we’ve developed our Vestas Shadow Detection System (VSDS) to overcome shadow flicker. A reliable and economic solution To provide the diagnostics and performance required by our customers, the VSDS system is engineered for complete technological reliability. Its direct connection to the turbine means it can operate even if the SCADA systems fail. VSDS has a good track record with more than fifty installations already in operation. For flawless compatibility, the control box and interfaces is designed with Vestas in control of overall specifications. Vestas Wind Systems A/S Hedeager 44 . 8200 Aarhus N . Denmark Tel.: +45 9730 0000 . Fax: +45 9730 0001 vestas@vestas.com . vestas.com2012-05-07T14:43:38+02:00http://nozebra.ipapercms.dk/Vestas/Communication/Productbrochure/TurbineOptions/VestasShadowDetectionSystem/?Page=2http://nozebra.ipapercms.dk/Vestas/Communication/Productbrochure/TurbineOptions/VestasShadowDetectionSystem/?Page=2How does it work? The VSDS system is integrated with the control system of the turbine. If the unit registers shadow flicker beyond a certain threshold, it pauses the blades to avoid the strobing effect on nearby properties. The equipment comprises two sensors, fitted to the east and west aspects of the turbine. A shadow controller unit measures the difference in intensity between those two readings and calculates how pronounced a shadow is at any given moment. The sensors are: · Heated to prevent freezing in conditions as low as -38oC. · Resistant to ground reflection for consistent results · Magnetised for cost-effective installation Shadow controllers are uniquely configured for each turbine. They are programmed with the locations of neighbouring properties, as well as timetables indicating when shadow flicker must be avoided. Don’t be in the dark about shadows The intensity of shadow casting is primarily dependent on four factors: · The angle and position of the sun in relation to the turbine and the property affected · The distance from the turbine to the property · The size of the rotor · The hub height Based on these values, WindPro software is used to calculate values for each turbine. These are a ‘theoretical’ worst-case shadow scenario, and an ‘actual’ shadow scenario. The latter takes into account live factors such as the weather conditions and whether or not the turbine is running These two values are important because in many markets they can be critical for planning permission. In Germany, for example, wind farms are limited to 30 hours of ‘theoretical’ shadow casting per year, but only eight hours per year of ‘actual’ shadow casting. The sensors are magnetised for cost-effective installation. © 2012 Vestas Wind Systems A/S. All rights reserved. This document was created by Vestas Wind Systems A/S on behalf of the Vestas Group and contains copyrighted material, trademarks and other proprietary information. This document or parts thereof may not be reproduced, altered or copied in any form or by any means without the prior written permission of Vestas Wind Systems A/S. All specifications are for information only and are subject to change without notice. Vestas Wind Systems A/S does not make any representations or extend any warranties, expressed or implied, as to the adequacy or accuracy of this information. This document may exist in multiple language versions. In case of inconsistencies between language versions the English version shall prevail. Certain technical options, services and wind turbine models may not be available in all locations/countries. 01/2012-EN2012-05-07T14:43:38+02:00