標題: FPGA Control of a Single-Phase T-Type NPC Grid Inverter for Low THD and Robust Performance
作者: Kuo, Chin-Chang
Tzou, Ying-Yu
電控工程研究所
Institute of Electrical and Control Engineering
關鍵字: grid inverter;adaptive predictive control;on-line inductance identification;mixed-signal FPGA
公開日期: 1-Jan-2017
摘要: This paper presents an FPGA-based adaptive predictive control scheme for single-phase T-type NPC inverter in applications to microgrids with high efficiency and robust performance. Predictive control is applied for current regulation to achieve fast dynamic response with low total harmonic distortion (THD). Implementation of a grid inverter with minimum inductor will result nonlinear inductance due to saturation effect. This nonlinearity can be tolerated with conventional PI controller with low bandwidth performance, however, oscillations or even instability may occur for predictive control with fast dynamic responses. An adaptive predictive control scheme with on-line inductance identification has been developed to ensure both fast dynamic response and robust stability. The proposed adaptive predictive controller has been realized using a mixed-signal FPGA Smartfusion (R) A2F500 from Microsemi. Experimental verification is carried out with a 3kW single-phase AT-NPC grid inverter. Experimental results show that the proposed control scheme can achieve both fast dynamic responses and high quality current regulation with THD close to its theoretical limits.
URI: http://hdl.handle.net/11536/147013
期刊: 2017 IEEE 3RD INTERNATIONAL FUTURE ENERGY ELECTRONICS CONFERENCE AND ECCE ASIA (IFEEC 2017-ECCE ASIA)
起始頁: 545
結束頁: 550
Appears in Collections:Conferences Paper