TY  - EJOU
AU  - Sun, Tiankui 
AU  - Shi, Mingming 
AU  - Xiao, long 
AU  - He, Ping 
AU  - Ji, Yu 
AU  - Yuan, Zhiyuan 

TI  - Parameter Design of Current Double Closed Loop for T-Type Three-Level Grid-Connected Inverter
T2  - Energy Engineering

PY  - 2023
VL  - 120
IS  - 7
SN  - 1546-0118

AB  - To reduce current harmonics caused by switching frequency, T-type grid-connected inverter topology with LCL filter is adopted. In view of the disadvantages of the slow response speed of the traditional current control and the failure to eliminate the influence of the LCL filter on the grid-connected current by using current PI control alone, a current double closed loop PI current tracking control is proposed. Through the theoretical analysis of the grid-connected inverter control principle, the grid-connected inverter control model is designed, and the transfer function model of each control link is deduced, and the current loop PI regulator is designed at last. The simulation results show that the control strategy is feasible.
KW  - T-type inverter; active damping; current double closed loop

DO  - 10.32604/ee.2023.026948