A recent ice detector, the LID-3300IP, is for use on wind turbines, especially those operating in extremely cold harsh weather. Effective ice detection contributes to increased safety and reduced maintenance.
In recent years, extreme weather conditions around the world have proven an additional hazard to wind-turbine operations. Ice forming on rotor blades has an adverse effect on turbine reliability. It’s also a safety hazard should ice fall off the blades. It could damage buildings, vehicles, and people close by. Turbine malfunctions and maintenance shut-downs reduce productivity.
The LID-3300IP Ice Detector is based on ultrasonic signal detection in which an output signal weakens in the presence of ice. When a set alarm level is reached, the ice detector begins to either heat the rotor blades or halt turbine operation. This means that potential problems associated with ice formation can be avoided and use minimal energy in heating the blades. Ultrasonic sensing is particularly sensitive, able to detect even small amounts of ice as it forms on the turbine blades.
The compact and easy-to-install ice-detector sensors can be fitted to new and existing turbines regardless of manufacturer. The ice sensors are also interchangeable and do not require calibration with the main control unit. The LID-3300IP is easy to connect to wind turbine control systems using a relay, current data, serial or TCP/IP interface. It operates through a local area network. Communication between the sensors and control unit takes place by an RS-485 channel. Congealment status, alarms, and parameters can be monitored and adjusted through a built-in web-based user interface. The unit allows for two analogue output signals so that external temperatures and freezing conditions can be measured. The detector’s purpose is to improve turbine production reliability and reduce the risks associated with ice formation in arctic conditions.
Labkotec’s LID-3300IP Ice Detector has passed tests carried out by the Technical Research Centre of Finland. The company says the ice detector meets all requirements and building permit standards. More than 2,000 Labkotec ice detectors have been supplied to turbine manufacturers in Europe including Enercon, Nordex, Repower, Vestas, and GE Wind Energy, and they are used in airports and weather stations.
Filed Under: News, Sensors