兆瓦级直驱式风力发电机组控制系统设计

Design on Control System of MW-Level Direct-Driven Wind Energy Generator

为了降低系统控制难度、提高机组转化效率,提出了一种以复合励磁同步发电机作为发电机的兆瓦级直驱式复合励磁同步风力发电系统,该系统由不可控二极管+直流环节+并联SPWM逆变器组成的交/直/交变流器将风能转化为电能送入电网。该机组控制系统由机组主控制器、复合励磁控制器、逆变器控制单元、变桨距机构、偏航机构等构成。对机组控制系统中各个部件的功能和结构进行了分析和设计,并通过Profibus现场总线将这些部件构成了一个集散控制系统。

In order to debase difficult of control system, and improve efficiency of transform, a new MW-level direct-driven mixed-excitation wind energy power system which uses mixed-excitation generator is put forward. This system adopts AC-DC-AC converter which is made up of a six-phase rectifier, common DC bus and two paralleled SPWM inverters, and control system of this set is made up of main controller, mixed-excitation controller, inverter controller, pitch controller and yaw controller. The function of those units is analyzed and designed, and those units construct a distributing center system using Profibus.