Small-Signal Modeling and Analysis of Grid-Connected Inverter with Power Differential Droop Control

The conventional voltage and frequency droop control strategy in grid-connected inverter suffers a major setback in the presence of disturbance by producing oscillations. Adding a power differential term in droop controller is an effective way to address such drawback. In this paper, grid-connected...

Full description

Bibliographic Details
Main Authors:	Xin Chen, Changhua Zhang, Qi Huang, Mark Ofori-Oduro
Format:	Article
Language:	English
Published:	Hindawi Limited 2016-01-01
Series:	Mathematical Problems in Engineering
Online Access:	http://dx.doi.org/10.1155/2016/3965945

id	doaj-419ce78aee984c02bf223ea3e6b4c35f
record_format	Article
spelling	doaj-419ce78aee984c02bf223ea3e6b4c35f2020-11-24T23:15:51ZengHindawi LimitedMathematical Problems in Engineering1024-123X1563-51472016-01-01201610.1155/2016/39659453965945Small-Signal Modeling and Analysis of Grid-Connected Inverter with Power Differential Droop ControlXin Chen0Changhua Zhang1Qi Huang2Mark Ofori-Oduro3School of Energy Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Energy Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Energy Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Energy Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, ChinaThe conventional voltage and frequency droop control strategy in grid-connected inverter suffers a major setback in the presence of disturbance by producing oscillations. Adding a power differential term in droop controller is an effective way to address such drawback. In this paper, grid-connected inverter’s small-signal models of the conventional droop control and the power differential droop control are established. The eigenvalues of the models are then determined by system matrix. The eigenvalues analysis is presented which helps in identifying the relationship between the system stability and controller parameters. It is concluded that the damping ratio of dominant low-frequency eigenvalues increased and the oscillation caused by the disturbance is suppressed when a power differential term is added to the droop control method. The MATLAB/Simulink models of grid-connected inverter with both control strategies are also established to validate the results of small-signal analysis.http://dx.doi.org/10.1155/2016/3965945
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Xin Chen Changhua Zhang Qi Huang Mark Ofori-Oduro
spellingShingle	Xin Chen Changhua Zhang Qi Huang Mark Ofori-Oduro Small-Signal Modeling and Analysis of Grid-Connected Inverter with Power Differential Droop Control Mathematical Problems in Engineering
author_facet	Xin Chen Changhua Zhang Qi Huang Mark Ofori-Oduro
author_sort	Xin Chen
title	Small-Signal Modeling and Analysis of Grid-Connected Inverter with Power Differential Droop Control
title_short	Small-Signal Modeling and Analysis of Grid-Connected Inverter with Power Differential Droop Control
title_full	Small-Signal Modeling and Analysis of Grid-Connected Inverter with Power Differential Droop Control
title_fullStr	Small-Signal Modeling and Analysis of Grid-Connected Inverter with Power Differential Droop Control
title_full_unstemmed	Small-Signal Modeling and Analysis of Grid-Connected Inverter with Power Differential Droop Control
title_sort	small-signal modeling and analysis of grid-connected inverter with power differential droop control
publisher	Hindawi Limited
series	Mathematical Problems in Engineering
issn	1024-123X 1563-5147
publishDate	2016-01-01
description	The conventional voltage and frequency droop control strategy in grid-connected inverter suffers a major setback in the presence of disturbance by producing oscillations. Adding a power differential term in droop controller is an effective way to address such drawback. In this paper, grid-connected inverter’s small-signal models of the conventional droop control and the power differential droop control are established. The eigenvalues of the models are then determined by system matrix. The eigenvalues analysis is presented which helps in identifying the relationship between the system stability and controller parameters. It is concluded that the damping ratio of dominant low-frequency eigenvalues increased and the oscillation caused by the disturbance is suppressed when a power differential term is added to the droop control method. The MATLAB/Simulink models of grid-connected inverter with both control strategies are also established to validate the results of small-signal analysis.
url	http://dx.doi.org/10.1155/2016/3965945
work_keys_str_mv	AT xinchen smallsignalmodelingandanalysisofgridconnectedinverterwithpowerdifferentialdroopcontrol AT changhuazhang smallsignalmodelingandanalysisofgridconnectedinverterwithpowerdifferentialdroopcontrol AT qihuang smallsignalmodelingandanalysisofgridconnectedinverterwithpowerdifferentialdroopcontrol AT markoforioduro smallsignalmodelingandanalysisofgridconnectedinverterwithpowerdifferentialdroopcontrol
_version_	1725589204553957376

Small-Signal Modeling and Analysis of Grid-Connected Inverter with Power Differential Droop Control

Similar Items