Title :
Design and analysis of the controllable output impedance method for parallel single-phase inverters
Author :
Haixian Liu ; Jinbin Zhao ; Keqing Qu
Author_Institution :
Coll. of Electr. Eng., Shanghai Univ. of Electr. Power, Shanghai, China
fDate :
Sept. 28 2014-Oct. 2 2014
Abstract :
A controllable output impedance method for parallel inverters system is proposed in this paper. The control strategy uses LCL filter in output side and add a current loop to adjusting the output current of the inverter bridge. With this modification, the output impedance of inverter is compensated to a specific value then the difference of line and filter impedance can be neglected. Redesigned output impedance reasonable can achieve power sharing with power rating ratio. Simulation results are presented to prove the efficiency and feasibility of proposed control strategy.
Keywords :
LC circuits; bridge circuits; electric current control; electric impedance; invertors; LCL filter inpedance; control strategy; controllable output impedance method analysis; parallel single-phase inverter bridge; power rating ratio; power sharing; Frequency control; Impedance; Inductors; Inverters; Reactive power; Steady-state; Voltage control;
Conference_Titel :
Telecommunications Energy Conference (INTELEC), 2014 IEEE 36th International
Conference_Location :
Vancouver, BC
DOI :
10.1109/INTLEC.2014.6972204
