时间膨胀法减小延迟对滞环控制仿真的影响  

Time Expansion Method to Reduce the Effect of Delay on Hysteresis Control Simulation

作　　者：周宏林 ZHOU Honglin(Central Research Academy of Dongfang Electric Corporation,Chengdu 611731,Sichuan,China)

机构地区：[1]东方电气股份有限公司中央研究院,四川成都611731

出　　处：《电气传动》2020年第11期72-77,共6页Electric Drive

摘　　要：在滞环电流控制的硬件在环仿真中,仿真机的输入到输出延迟会导致滞环带宽增加,进而降低滞环控制的开关频率,让并网逆变器的电流谐波增大,使硬件在环仿真下的控制器性能劣于真实系统。随着开关频率的提高,一味通过提高仿真机性能来解决仿真准确度问题不可行。提出一种基于时间膨胀的方法来解决这一问题,使得可以在普通的仿真机上也可以完成滞环电流控制的性能验证。最后,通过试验验证了所提出方法的可行性和正确性。The delay of the simulator can apparently increase the hysteresis current band,reduce the switching frequency,and increase the current THD(total harmonic distortion)and therefore deteriorate the control.With the increase of switching frequency,it is not feasible to solve the accuracy problem only by upgrading the simulator.As an alternative software solution,a time expansion method was proposed.The experimental results prove that the proposed time expansion method can effectively cope with simulator delay in the HIL(hardware-in-the-loop)study of hysteresis current control,making it possible to achieve satisfactory performance with an ordinary simulator.

关 键 词：硬件在环 实时仿真 延迟 滞环电流控制 并网逆变器 

分 类 号：TM464[电气工程—电器] TM743