基于直流电动机的风力机特性模拟

为采用直流电动机模拟风力机特性以满足实验室风力发电研究的需要,分析了风力机和直流电动机的运行原理,探讨了各自的功率及转矩特性,对比研究了两者运行特性的异同。制定了实现简单、特性优良的转矩模拟方案,它通过控制直流电动机电枢绕组电流来实现风力机转矩特性的模拟。建立了由PC机、数据采集卡和晶闸管调速器构成的风力机模拟硬件平台,开发了风力机模拟监控软件,在此基础上组成了完整的风力机特性模拟系统。对风速变化及机组转速变化两种典型运行条件下的风力机运行特性进行了模拟实验,模拟结果与理论数据达到了高度的吻合。基于转矩模拟算法的风力机特性模拟方案,可方便地应用于实验室条件下风力发电技术的研究。

Imitation of the Characteristic of Wind Turbine Based on DC Motor

In order to imitate wind turbine in laboratory, this paper firstly analyzed the operation principles and power & torque characteristics of wind turbine and direct current(DC) motor, then it investigated the operation characteristics of wind turbine contrast to those of DC motor. The torque imitation scheme was provided, which imitates the torque characteristics of wind turbine by controlling the armature current of DC motor. The scheme has good performance and high feasibility. The whole wind turbine imitation system, which includes not only hardware platform comprising PC, datum-collection board and thyristor velocity-regulator, but also wind turbine imitation software. At last, the imitation experiments of wind turbine operation characteristics were performed, The experiments were done under two typical conditions of variable wind speed and variable machine velocity. The experimental results are highly consistent with theoretical datum. The torque imitation scheme of wind turbine characteristics can be conveniently used in the study of wind power generation in laboratory.