Title :
A resonance suppression method for a multiple grid-connected-converter system with LCL filter
Author :
Shulong Tan ; Geng Yang ; Hua Geng ; Siman Ma ; Weiyang Wu
Author_Institution :
Dept. of Autom., Tsinghua Univ., Beijing, China
Abstract :
Multiple resonances may result in instability of a LCL filter based multiple grid connected converter (MGCC) system. This paper investigates the critical factors of multiple resonances in MGCC system. It is found that, closed-loop output admittance of the grid connected converter can be configured to meet the requirements of resonances suppression, by properly designing control method and parameters. To improve the multiple resonances suppression, a control method is applied to the MGCC system, which is a combination of proportional resonant (PR) control and full state feedback control. According to the proposed design principle of the closed-loop output admittance, a case study using the control method above is given. Simulation results are provided to validate the correctness and effectiveness of the proposed design principle and control method.
Keywords :
power convertors; power filters; power grids; state feedback; LCL filter; MGCC system; PR control; closed-loop output admittance; full-state feedback control; multiple-grid-connected-converter system; proportional resonant control; resonance suppression method; Admittance; Impedance; Integrated circuit modeling; Power harmonic filters; Power system stability; Stability criteria; State feedback; LCL filter; full state feedback control; multiple grid connected converter; resonances suppression;
Conference_Titel :
Electronics and Application Conference and Exposition (PEAC), 2014 International
Conference_Location :
Shanghai
DOI :
10.1109/PEAC.2014.7038015