Circulating-current nonlinear L2-gain attenuation control of parallel pulse width modulation rectifiers
GU Zhi-feng
WANG Hui-yong
ZHU Chang-qing
WANG Wen-ting
Abstract：For the circulating-current restrain in parallel pulse width modulation(PWM)rectifiers caused by the uncer-tain model parameters and external disturbances,the new control method,composed by the optimal L2-gain current inner loop control and the zero sequence current outer loop control,is proposed.The optimal L2-gain current inner loop control not only can realize the minimum gain of the disturbance to the output,but also can achieve the power transfer between the parallel PWM rectifiers.The zero sequence current outer loop control can retrain the circulating-current caused by the uncertain parameters and the disturbances.The simulation results of the parallel PWM rectifiers shows that comparing with the traditional proportional-integral control method,the new two loop L2-gain control method can significantly re-duce circulating-current between the parallel PWM rectifiers and improve the power supply quality,which is important to improve the stability of the power system.
Keywords：optimal L2-gain controlnonlinear L2-gain controlparallel PWM rectifierscirculating-current restraintwo loop controlzero sequence current restrain
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 1614-1620 )