基于直流电动机的风力机特性模拟

首先分析了风力机吸收风能原理.以此建立了风力机运行特性的数学模型,给出了风力机运行的功率特性和转矩特性,并利用Matlab/Simulink实现仿真.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,通过风力机与直流电动机的模型,对比研究了风力机与直流电动机运行特性的异同,制定了实现简单、特性优良的转矩模拟方案,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.以此为基础在Matlab环境中组建了风力机特性的模拟系统.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,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 Machine

This paper firstly analyzes the aerodynamic principle of wind turbine.Based on this principle,it realizes the mathematic model for acquiring the operation characteristics of wind turbine.This model is used to analyze the power and torque characteristics of wind turbine.This model is realized by using the Matlab/Simulink software.Using the DC machine to imitate wind turbine for meeting the need of laboratory.By contrasting the operational characteristic of wind turbine and DC machine,the paper investigates the torque imitation scheme,which can be realized simply the paper controls PI current loop to control the armature voltage for achieving the torque characteristics of the simulated wind turbine.Based on this,the whole wind turbine imitation system is realized by using Matlab. The imitation is done under two typical conditions of variable wind speed and variable machine velocity.The imitation results are highly consistent with theoretical data.The torque imitation scheme of wind turbine characteristics can be conveniently used in the study of wind power generation in laboratory.