摘要
在对逆变器并联系统环流产生机理分析的基础上,提出了一种环流负反馈外加平均负载电流前馈的均流策略,通过调节反馈系数,在系统输出特性不变的条件下增大了环流阻抗,从而有效减小了逆变器并联运行时因幅值差异产生的环流.利用TMS320LF2407A芯片实现并联系统数字控制和CAN总线的通信,提高了并联系统的抗扰能力和可靠性.通过两台1.5kW逆变器并联的Matlab仿真和实验,证明了并联系统在线性负载条件下有很好的动态响应性能和均流效果.
On the basis of analyzing the generation mechanism of inverter parallel system circle current,this paper brings forward a sort of balancing current strategy where the feed forward of average load current is externally added to the negative feedback of circle current,and by adjusting the feedback coefficient,the current impedance is increased in the condition of system output characteristics being constant,thus reducing effectively the circle current resulted from amplitude differences while the inverter operating in parallel.By utilizing TMS320LF2407A chip to implement the communication between the parallel system digital control and CAN bus,the anti-jamming and reliability of parallel system are improved.By Matlab simulations and experiments with two 1.5kw inverters in parallel,it is proved that the parallel system is of very nice dynamic response and current balancing effect in the case of linear load.
出处
《空军雷达学院学报》
2012年第5期353-357,共5页
Journal of Air Force Radar Academy
