Improved droop control of parallel inverter system in standalone microgrid

Author

Yaoqin, Jia ; Dingkun, Liu ; Shengkui, Pan

Author_Institution

Xi´´an Jiaotong Univ., Xi´´an, China

fYear

2011

fDate

May 30 2011-June 3 2011

Firstpage

1506

Lastpage

1513

Abstract

The standalone microgrid describes the condition that isolated from the utility system. Inverter parallel operation is the key issue of standalone microgrid. The objective of the parallel inverter system is to realize the load sharing between inverters and keep the voltage and frequency stable under different load conditions and during load variations. This paper employs the double-loop control method to obtain stable voltage and frequency with droop control method for load sharing. According to the characteristics of the low voltage transmission line, the linear transformed droop control method is applied. Improvement of the droop control is proposed to keep the voltage more stable. The proposed control strategy is verified by the simulation and experimental results.

Keywords

distributed power generation; invertors; power distribution control; power system stability; double-loop control method; frequency stability; improved droop control method; linear transformed droop control method; low-voltage transmission line; parallel inverter system; standalone microgrid; voltage stability; Distributed power generation; Inverters; Low voltage; Reactive power; Transfer functions; Voltage control; Improved Droop Control; Load Sharing; Parallel Inverters; Standalone Microgrid;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and ECCE Asia (ICPE & ECCE), 2011 IEEE 8th International Conference on

Conference_Location

Jeju

ISSN

2150-6078

Print_ISBN

978-1-61284-958-4

Electronic_ISBN

2150-6078

Type

conf

DOI

10.1109/ICPE.2011.5944493

Filename

5944493