Using fuzzy control for parallel-inverter system with nonlinear-load

Author

Song, Chunwei ; Zhao, Rongxiang ; Yang, Huan ; Zeng, Zheng ; Wu, Jing

Author_Institution

Dept. of Electr. Eng., Zhejiang Univ., Hangzhou, China

fYear

2010

fDate

10-13 Oct. 2010

Firstpage

193

Lastpage

197

Abstract

It is difficult to obtain a more precise mathematical model of parallel-inverter system with a nonlinear load. Nonlinear load is the general factor which affects output voltage total harmonic distortion (THD) and current sharing. But fuzzy controller can control well without a precise mathematical model. Master-slave control is used to control the parallel-inverter system in this paper. The voltage regulator in outer control loop is fuzzy controller. While fuzzy self-tuning PI controller is designed for current regulator in each inverter. Simulation results show that master-slave control scheduling with new controllers can achieve low THD in the system output voltage and fast dynamic response for nonlinear loads. What is more, it has good current-sharing performance.

Keywords

PI control; control system synthesis; fuzzy control; harmonic distortion; invertors; load (electric); nonlinear control systems; self-adjusting systems; voltage regulators; THD; current sharing; dynamic response; fuzzy self-tuning PI controller; master-slave control; nonlinear load; parallel-inverter system; total harmonic distortion; voltage regulator; Inverters; Master-slave; Mathematical model; Niobium; Pulse width modulation; Regulators; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines and Systems (ICEMS), 2010 International Conference on

Conference_Location

Incheon

Print_ISBN

978-1-4244-7720-3

Type

conf

Filename

5664045