摘要
非线性整流性负载是影响逆变器输出电压波形质量的主要因素。针对带非线性负载的单相逆变器,其输出波形畸变较大,动态性能差和总谐波畸变率(THD)较高的缺点。为了解决上述问题,首先要解决整流性负载的模型问题。用死区模型代替整流性负载,得到具有整流性负载的单相逆变系统的仿真模型。采用了一种基于遗传算法优化的模糊控制方案,并在MATLAB上进行了仿真验证。仿真结果表明,模糊控制方法能同时实现逆变器的高精度稳态输出波形、较低的THD值和快速动态响应性能。
A nonlinear rectifier load is a primary factor which influences the quality of the inverter＇s output voltage waveform.To resolve this problem,the model of the rectifier needs to be resolved firstly.This paper proposes the dead-zone modeling method of the rectifier load,and the model is tested for correctness through simulation analysis.The simulation model of the inverter system with a nonlinear rectifier load is obtained based on the dead-zone model.With the nonlinear load,the inverter has the defects of larger output waveform distortion,poor dynamic performance and higher total harmonic distortion（THD）.To overcome these shortcomings,fuzzy control strategy based on Genetic Algorithm is proposed.The simulation based on MATLAB is implemented to test the control strategy.The simulation results show that this fuzzy control method can realize the high precision output waveform,low THD and rapid dynamic response performance of the inverter system.
出处
《计算机仿真》
CSCD
北大核心
2010年第8期127-131,226,共6页
Computer Simulation
关键词
单相逆变系统
整流性负载
模糊控制
遗传算法
Single-phase inverter system
Rectifier load
Fuzzy control
Genetic Algorithm（GA）
