电动变桨系统（Electric variable pitch system）.docVIP

电动变桨系统（Electric variable pitch system） An electric paddle changing system Variable pitch is the blade installed on the hub of a wind turbine. The aerodynamic characteristics of the blade are changed by changing the pitch angle with the control technology and the power system, so that the stress condition of the blade in the whole machine is greatly improved. Variable pitch mechanism is to adjust the angle of the pulp at any time near the rated wind speed, according to the change of wind speed, to control the mechanical energy absorbed. On the one hand, the maximum energy (corresponding to the rated power) is guaranteed. The same is to reduce the impact of wind on the wind turbine. In the process of grid connected, fast and no impact can be realized. Variable pitch control combined with variable speed constant frequency technology ultimately improves the power generation efficiency and power quality of the whole wind power generation system. An electrically variable pitch system allows 3 oars to paddle independently, providing power output and sufficient braking capacity for the wind turbine. This will avoid overloading the fan. As we all know, each of our paddles has a super capacitor and servo motors placed at the hub, each blade set, and of course, the super capacitor is placed in the paddle control cabinet. The control cabinet is placed at the junction of the wheel hub and the blade. The communication bus and cable of the whole system are connected with the main control by the slip ring. The main control and the variable disk communicate with the field bus to achieve the purpose of controlling 3 independent changing devices. According to the wind speed, generator power and speed, the main control sends the command value to the variable pitch control system, and the electric variable pitch system feedback the actual value and operation state to the main controller. Also, the electric paddle changing system must be able to meet the fast response master command. Ind