基于双闭环控制的单相逆变器研究  

Research on Single Inverter Based on Dual-Loop Control Strategy

作　　者：沈亚瑞[1] 宋建成[1] 

机构地区：[1]太原理工大学电气与动力工程学院,山西太原030024

出　　处：《电气开关》2012年第4期21-24,共4页Electric Switchgear

基　　金：山西省青年自然科学基金资助项目(2011021015-1)

摘　　要：针对逆变器带非线性负载时畸变电流在逆变器出阻抗上产生谐波压降导致输出电压波形畸变的问题,建立了单相逆变器的数学模型,确定了固定开关频率的电压外环电感电流内环的瞬时值双闭环控制策略,采用单极性倍频调制方式,搭建了以STM32为控制核心的单相逆变器实验样机并进行了相关实验。实验结果表明,在双闭环控制策略控制下逆变器输出电压波形可得到及时补偿,输出电压波形正弦度高,电压谐波含量小。For the inverter output voltage waveform distortion caused by the harmonic voltage drop of the equivalent output impedance of the inverter with nonlinear loads,a mathematical model of the single-phase inverter is established,and fixed switching frequency instantaneous dual-loop control strategy with outer voltage and inner inductor current is made,which is modulated by unipolar frequency multiplication modulation.The experimental prototype employed STM32 as control core has been constructed.It is shown by the experimental results that output voltage waveform of the inverter can be compensated in time and has good sine degree and low harmonic distortion.

关 键 词：单相逆变器 双闭环 单极性倍频调制 STM32 

分 类 号：TM464[电气工程—电器]