摘要
在分析三相四桥臂逆变器工作模态的基础上,引入开关状态函数建立了四桥臂逆变器系统离散的、非线性的数学模型。提出应用开关周期平均算子,将离散的系统化成连续的系统,并用小信号扰动法将非线性的系统化成线性系统,建立了从三相四桥臂逆变器控制输入到逆变器输出的传递函数数学模型。并应用PSIM软件对相同参数下元件电路开关模型和传递函数模型的频域特性做了仿真实验,验证了数学模型的合理性。
A discrete and nonlinear mathematical model of three-phase four-leg inverter is built up with the switch state functions based on the analysis of its working modes.The switching cycle average operator is proposed to transform discrete system into continuous one and the small signal perturbation method is applied to transform nonlinear system into linear one.The transfer function models are thus set up from its control input to its output.Simulative experiments of its frequency domain property are carried out with PSIM soft,using respectively the component circuit switch model and the transfer function model with same parameters,which demonstrate the rationality of mathematical models.
出处
《电力自动化设备》
EI
CSCD
北大核心
2011年第6期98-101,共4页
Electric Power Automation Equipment
基金
陕西省教育厅科研计划资助项目(2010JK468
09JK374)~~
关键词
三相四桥臂
逆变器
数学模型
PSIM
仿真
three-phase four-leg
electric inverters
mathematical models
PSIM
computer simulation
