摘要
为了建立变流器端口电磁干扰模型,提出一种基于全相位快速傅里叶变换(all-phase fast Fourier transform,apFFT)的端口建模方法。首先获取待分析模型的端口电压电流时域数据,接着在考虑时移相位差补偿的条件下采用apFFT对测量数据进行时频变换,最后对频域数据进行拟合,建立端口电磁干扰模型。基于该方法对某型号光伏微型逆变系统进行建模,仿真和实测结果表明所提建模方法具有可行性和有效性。
In order to establish an electromagnetic interference(EMI)model of the converter port,a method based on all-phase FFT(apFFT)is proposed.Firstly,the time domain data of the port voltages and current to be analyzed are obtained.Secondly,the time-frequency transformation is carried out on the measurement data by the apFFT under the condition of considering the time-shift phase difference compensation.Finally,the frequency-domain data is fitted,and a port EMI model is established.Based on this method,a certain type of photovoltaic micro-inverter system is modeled.The simulation and measurement results show that the proposed modeling method is feasible and effective.
作者
郑晓燕
叶世泽
陈恒林
ZHENG Xiaoyan;YE Shize;CHEN Henglin(College of Electrical Engineering,Zhejiang University,Zhejiang 310027,China)
出处
《电工技术》
2020年第13期25-28,共4页
Electric Engineering
基金
国家自然科学基金(编号51577172)。
关键词
全相位FFT
时移相位差补偿法
端口模型
all-phase FFT
time-shift phase difference compensation method
port model
