A novel discrete sinusoidal signal integrator (DSSI) based adaptive frequency controller for single-phase grid-connected inverter

作者：Li, Zongjian; Wang, Jun; Jiang, Xi; Shen, Z. John; Zeng, Cheng

来源：43rd Annual Conference of the IEEE Industrial Electronics Society, IECON 2017, Beijing, China, 2017-10-29 To 2017-11-01.

DOI：10.1109/IECON.2017.8217353

• Arbitrary frequencies
• Discretizations
• DSSI
• grid-tied converter
• resonant
• Single phase grid connected inverters
• Sinusoidal signal integrators
• Zero steady state error

A novel discrete sinusoidal signal integrator (DSSI) structure is proposed in this paper for single grid-tied inverters. The DSSI provides an adjustable gain and bandwidth at the expected frequency and a highly attenuated gain at other frequencies which make the DSSI based controllers obtain the zero steady-state error tracking performance of arbitrary frequencies. The performance of the conventional proportional resonant (PR) or quasi-PR controllers is limited by the discrete process. The DSSI based controller is implemented with difference equations directly without any discrete process and the parameters of DSSI are explicit and concise, which is convenient to implement the adaptive frequency control without resource-consuming. The experimental results provide a real-time comparison among the PR, PI and DSSI based controllers, which validate the theoretical analysis.

• 出版日期2017