A Highly Robust Single-Loop Current Control Scheme for Grid-Connected Inverter With an Improved LCCL Filter Configuration

• Published in: IEEE transactions on power electronics Vol. 33; no. 10; pp. 8474 - 8487
• Main Authors: Pan, Donghua, Ruan, Xinbo, Wang, Xiongfei, Blaabjerg, Frede, Wang, Xuehua, Zhou, Qingfeng
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.10.2018; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Active damping; Capacitors; Configurations; Current control; Damping; Delays; grid impedance; grid-connected inverter; Impedance; Inverters; LCCL filter; Pulse width modulation; Resonant frequency; Robust control; single-loop control

Single-loop current control is an attractive scheme for the LCL-type grid-connected inverter due to its simplicity and low cost. However, conventional single-loop control schemes, which command either the inverter current or the grid current, are subject to the specific resonance frequency regions....