Mode-dependent seamless transfer control strategy of a microgrid via a small-signal stability approach

Ying Wu*, Josep M. Guerrero, Yanpeng Wu

*Kontaktforfatter

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

A microgrid is an effective solution to enhance the integration of distributed renewable energy resources, which can operate both in grid connected mode and islanded mode. In order to reduce the jumps of the system variables within acceptable limits to ensure the system has good transient performance and power quality in multiple operating modes, seamless transfer is the key problem to be considered. In this paper, due to the different multiple equilibrium points for the two operating modes, the dynamics of every operating mode re modeled as a subsystem with all the variables that are needed to be synchronized. Linearization is carried out respectively for the two operation modes on the different equilibriums in a state-space form based on the small-signal stability method. To reduce the conservatism of the unified controller, the concept of the relative Lyapunov function is introduced to derive a multiple segmental Lyapunov method and a robust feedback mode-dependent switching controller is designed to achieve smooth transfer by making the deviation energy of the two modes both converge to the zero point. To rapidly detect the switching signal, a sparse communication network is introduced by the use of low bandwidth communication links to broadcast the switching signal to each distributed controller. Finally, two microgrid test systems were built in SIMULINK to show the feasibility and effectiveness of the proposed seamless transfer control strategies.
OriginalsprogEngelsk
TidsskriftAsian Journal of Control
Vol/bind21
Udgave nummer4
Sider (fra-til)2087-2104
Antal sider18
ISSN1561-8625
DOI
StatusUdgivet - jul. 2019

Fingerprint

Controllers
Renewable energy resources
Lyapunov methods
Power quality
Lyapunov functions
Linearization
Telecommunication networks
Telecommunication links
Feedback
Bandwidth

Citer dette

@article{e53f53d427024512b7ee932e1c0fd0b7,
title = "Mode-dependent seamless transfer control strategy of a microgrid via a small-signal stability approach",
abstract = "A microgrid is an effective solution to enhance the integration of distributed renewable energy resources, which can operate both in grid connected mode and islanded mode. In order to reduce the jumps of the system variables within acceptable limits to ensure the system has good transient performance and power quality in multiple operating modes, seamless transfer is the key problem to be considered. In this paper, due to the different multiple equilibrium points for the two operating modes, the dynamics of every operating mode re modeled as a subsystem with all the variables that are needed to be synchronized. Linearization is carried out respectively for the two operation modes on the different equilibriums in a state-space form based on the small-signal stability method. To reduce the conservatism of the unified controller, the concept of the relative Lyapunov function is introduced to derive a multiple segmental Lyapunov method and a robust feedback mode-dependent switching controller is designed to achieve smooth transfer by making the deviation energy of the two modes both converge to the zero point. To rapidly detect the switching signal, a sparse communication network is introduced by the use of low bandwidth communication links to broadcast the switching signal to each distributed controller. Finally, two microgrid test systems were built in SIMULINK to show the feasibility and effectiveness of the proposed seamless transfer control strategies.",
keywords = "Microgrid, Mode-dependent controller, Multiple equilibrium points, Seamless transfer, Small-signal stability, State-space model",
author = "Ying Wu and Guerrero, {Josep M.} and Yanpeng Wu",
year = "2019",
month = "7",
doi = "10.1002/asjc.2055",
language = "English",
volume = "21",
pages = "2087--2104",
journal = "Asian Journal of Control",
issn = "1561-8625",
publisher = "Wiley-Blackwell",
number = "4",

}

Mode-dependent seamless transfer control strategy of a microgrid via a small-signal stability approach. / Wu, Ying; Guerrero, Josep M.; Wu, Yanpeng.

I: Asian Journal of Control, Bind 21, Nr. 4, 07.2019, s. 2087-2104.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Mode-dependent seamless transfer control strategy of a microgrid via a small-signal stability approach

AU - Wu, Ying

AU - Guerrero, Josep M.

AU - Wu, Yanpeng

PY - 2019/7

Y1 - 2019/7

N2 - A microgrid is an effective solution to enhance the integration of distributed renewable energy resources, which can operate both in grid connected mode and islanded mode. In order to reduce the jumps of the system variables within acceptable limits to ensure the system has good transient performance and power quality in multiple operating modes, seamless transfer is the key problem to be considered. In this paper, due to the different multiple equilibrium points for the two operating modes, the dynamics of every operating mode re modeled as a subsystem with all the variables that are needed to be synchronized. Linearization is carried out respectively for the two operation modes on the different equilibriums in a state-space form based on the small-signal stability method. To reduce the conservatism of the unified controller, the concept of the relative Lyapunov function is introduced to derive a multiple segmental Lyapunov method and a robust feedback mode-dependent switching controller is designed to achieve smooth transfer by making the deviation energy of the two modes both converge to the zero point. To rapidly detect the switching signal, a sparse communication network is introduced by the use of low bandwidth communication links to broadcast the switching signal to each distributed controller. Finally, two microgrid test systems were built in SIMULINK to show the feasibility and effectiveness of the proposed seamless transfer control strategies.

AB - A microgrid is an effective solution to enhance the integration of distributed renewable energy resources, which can operate both in grid connected mode and islanded mode. In order to reduce the jumps of the system variables within acceptable limits to ensure the system has good transient performance and power quality in multiple operating modes, seamless transfer is the key problem to be considered. In this paper, due to the different multiple equilibrium points for the two operating modes, the dynamics of every operating mode re modeled as a subsystem with all the variables that are needed to be synchronized. Linearization is carried out respectively for the two operation modes on the different equilibriums in a state-space form based on the small-signal stability method. To reduce the conservatism of the unified controller, the concept of the relative Lyapunov function is introduced to derive a multiple segmental Lyapunov method and a robust feedback mode-dependent switching controller is designed to achieve smooth transfer by making the deviation energy of the two modes both converge to the zero point. To rapidly detect the switching signal, a sparse communication network is introduced by the use of low bandwidth communication links to broadcast the switching signal to each distributed controller. Finally, two microgrid test systems were built in SIMULINK to show the feasibility and effectiveness of the proposed seamless transfer control strategies.

KW - Microgrid

KW - Mode-dependent controller

KW - Multiple equilibrium points

KW - Seamless transfer

KW - Small-signal stability

KW - State-space model

UR - http://www.scopus.com/inward/record.url?scp=85061604442&partnerID=8YFLogxK

U2 - 10.1002/asjc.2055

DO - 10.1002/asjc.2055

M3 - Journal article

AN - SCOPUS:85061604442

VL - 21

SP - 2087

EP - 2104

JO - Asian Journal of Control

JF - Asian Journal of Control

SN - 1561-8625

IS - 4

ER -