Design and implementation of T-type three-level grid-connected inverter
Ji Ningyi1, Zhao Tao2, Xu You2, Xu Hongjian1
1. School of Electric Engineering, Nanjing Institute of Technology, Nanjing 211167; 2. School of Automation, Nanjing Institute of Technology, Nanjing 211167
Abstract A T-type three-level grid-connected inverter is designed with DSP chip TMS320F28335 as the control core. The article explains double closed loop control strategy based of PI voltage outer loop and PR current inner loop, and details the main circuit system and control system components selection and design options.According to the grid experiment results,the output current of the inverter is stable and its phase is symmetrical,the harmonic distortion is low, which meets the requirements of power quality required by inverter grid connection and proves the rationality of the inverter design parameters and the feasibility of the control scheme.
2018, Vol. 19 
