摘要
实时仿真是硬件在环(HIL)仿真的特点,在实时仿真中必须采用定步长仿真。针对定步长仿真中所出现的脉宽调制(PWM)采样失真现象,提出了一种基于面积等效原理的处理方法,该方法不仅能够避免采样失真问题,而且由于可设置仿真步长等于脉冲周期,故减少了仿真的计算量,提高了实时性和精确性。在Matlab中,根据DC/DC变换电路和三相逆变电路的数学模型搭建其离散模型进行实时仿真,针对定步长仿真中出现的不同PWM采样失真现象,通过加入基于面积等效原理的处理方法,与理想状况下的连续仿真结果进行对比,最后通过实验验证了该方法在实时仿真PWM信号采样处理方面的有效性和通用性。
Real-time simulation is the characteristic of hardware-in-the-loop(HIL) simulation,which must adopt the simulation of fixed step size.Aiming at the pulse width modulation(PWM) sampling distortion in the simulation of fixed step size,a processing method based on the area equivalent principle is proposed,which can not only avoid the sampling distortion,but also set the simulation step size equal to the pulse period,which reduces the computation of simulation and improves the real-time and accuracy.In Matlab,according to DC/DC conversion circuit and the mathematical model of three-phase inverter circuit structures,its discrete model is built for real-time simulation.Aiming at the different PWM sampling distortion phenomenon in the simulation of fixed step size,by adding processing method based on the area equivalent principle,it’s compared with the continuous simulation results under the ideal conditions.At last,through experiment,the effectiveness and versatility of this method are verified in real-time simulation PWM signal sampling.
作者
应鹏飞
苏建徽
汪海宁
施永
YING Peng-fei;SU Jian-hui;WANG Hai-ning;SHI Yong(Engineering Research Center of PV Systerm,Ministry of Education,Hefei University of Technology,Hefei 230009,China)
出处
《电力电子技术》
CSCD
北大核心
2021年第11期115-119,共5页
Power Electronics
基金
国家自然科学基金(51907045)
安徽省自然科学基金(1908085QE238)。
关键词
信号采样
定步长仿真
面积等效原理
signal sampling
simulation of fixed step size
area equivalent principle
