Research on finite-time full-order sliding mode control of self-synchronous grid-connected inverter
ZHENG Xue-mei
SHI Xu
CHEN Xin
FNEG Yong
Abstract：For the delay reason of grid-side information acquisition in the switching process of single inverter from off-grid to grid-connected,it's difficult to realize the function of self-synchronizing grid information of inverter for the classical virtual impedance method.This paper designs a finite-time full-order sliding mode(FOSM)DC bus voltage/reactive power controller.Compared with PQ controller,the proposed controller can reduce the complex phase-locked loop(PLL),can realize self-synchronous tracking of grid information including the grid-side frequency and voltage informations compared with virtual synchronous generator(VSG)control,finite-time FOSM can realize faster response speed and stronger robust-ness compared with the traditional proportional-integral control.The simulation and experimental results show that the proposed control strategies can quickly track the grid voltage information,and effectively improve the dynamic regulation ability of the inverter output voltage.
Keywords：self-synchronizationgrid connected inverterfinite-time controlfull-order terminal sliding mode control
Publication Date：2023-11-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 1903-1910 )