摘要
以LC并网逆变器为研究对象,建立LC滤波器数学模型,通过采样并网逆变器端口电压、电网电压以及并网电流,提出一种简单的变步长式电感识别方法。该方法通过滤波器数学模型进行推导电感表达式,通过采样的数据对参考电感值进行不断预测,当参考电感值与实际电感值得误差小于可接受范围,即可用参考电感值作为实际电感值进行后续控制。该方法简单易实现,仿真和实验波形验证了所提方法的有效性。
Taking the LC grid connected inverter as the research object,a mathematical model of LC filter is established.By sampling the port voltage,grid voltage and grid current of the inverter,a simple variable step type inductance identification method is proposed.The method deduces the inductance expression through the mathematical model of the filter,and constantly predicts the reference inductance value through the sampled data.When the error between the reference inductance value and the actual inductance value is less than the acceptable range,the reference inductance value can be used as the actual inductance value for subsequent control.The method is simple and easy to implement,and the simulation and experimental waveforms verify the effectiveness of the proposed method.
作者
李春来
苑舜
LI Chunlai;YUAN Shun(School of Electrical Engineering,Shenyang University of Technology,Shenyang Liaoning 110870,China)
出处
《电子器件》
CAS
北大核心
2020年第4期800-803,共4页
Chinese Journal of Electron Devices
基金
国家科技支撑计划-含大型光伏电站的多种能源发电联合运行控制关键技术研究及示范项目(2013BAA02B01)。
关键词
并网变换器
变步长
电感识别
grid connected converter
variable step size
inductance identification
