The yaw system is one of the essential components of the horizontal axis wind turbine. The active yaw generally uses a wind direction indicator, which is placed on the nacelle of the wind turbine, and the yaw system rotates at a certain angle in the corresponding direction according to the measured wind direction. Passive yaw mainly refers to the downwind fan, etc., which passively rotates with the wind. When the fan is not at an angle to the wind direction, the fan continues to rotate under the action of the wind. The wind direction indicator is installed on the top of the cabin and rotates with the cabin. Therefore, it can only measure the approximate angle between the cabin and the direction of the incoming wind to determine which direction to head into the wind, but cannot detect it. the actual direction of the wind. Therefore, the wind direction indicator used on the wind turbine and the indicatorWind direction sensor used on the wind measuring device are very different in structure and principle. The wind direction sensor is installed on a fixed bracket on the fiberglass nacelle cover of the wind turbine and can rotate synchronously with the wind turbine. Two photosensitive sensors are installed in the weather vane, OPT is a 0 degree angle sensor and OPT2 is a 90 degree angle sensor. Its working principle is as follows: a semi-circular barrel cover is driven by a weather vane. When the OPT1 or OPT2 sensor is not blocked by the semi-cylindrical cover, the sensor output signal is high level, otherwise it is low level.
Why can downwind wind turbines automatically yaw?
2024-08-06 19:30:02
Introduction Why can downwind wind turbines yaw automatically? The yaw system is one of the essential components of horizontal axis wind turbines. Active yaw typically uses a wind direction instrument, placed on the wind turbine.
