Synchronizability and Synchronization Rate of AC Microgrids: A Topological Perspective

When various distributed generation (DG) technologies are integrated into an islanded AC microgrid (MG), the system's heterogeneous characteristics make synchronizing all units within the network more challenging. From the perspective of complex networks, the capability of an islanded MG to ach...

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Published inIEEE transactions on network science and engineering Vol. 11; no. 2; pp. 1 - 18
Main Authors Yu, Chang, Xiao, Wenqian
Format Journal Article
LanguageEnglish
Published Piscataway IEEE 01.03.2024
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
AC microgrid
Algorithms
Complex networks
Couplings
Distributed generation
Frequency synchronization
Indexes
Network topologies
network topology
Stability criteria
Synchronism
Synchronization
Topology
Voltage sags
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Abstract When various distributed generation (DG) technologies are integrated into an islanded AC microgrid (MG), the system's heterogeneous characteristics make synchronizing all units within the network more challenging. From the perspective of complex networks, the capability of an islanded MG to achieve synchronization is closely associated with its physical topology. Consequently, a pressing need exists for a theoretical analysis of the network topology's influence on synchronizability in AC MGs. In this paper, we first develop a concise criterion for the synchronization condition of AC MGs and then introduce the definition of the synchronizability index, which measures the robustness of synchronization against disturbances such as voltage sags, sudden load changes, and component failures. Subsequently, we investigate the topology effect on synchronizability in islanded AC MGs for cases involving additional new connections or a unit node. Moreover, we provide an explicit expression of the general algorithm for computing the synchronization rate associated with topology parameters, such as the incidence matrix, weight matrix, and algebraic connectivity, among others, in the MG. The condition for the maximum synchronization rate is also explored. Finally, the accuracy of the theoretical results is validated through several test systems.
AbstractList When various distributed generation (DG) technologies are integrated into an islanded AC microgrid (MG), the system's heterogeneous characteristics make synchronizing all units within the network more challenging. From the perspective of complex networks, the capability of an islanded MG to achieve synchronization is closely associated with its physical topology. Consequently, a pressing need exists for a theoretical analysis of the network topology's influence on synchronizability in AC MGs. In this article, we first develop a concise criterion for the synchronization condition of AC MGs and then introduce the definition of the synchronizability index, which measures the robustness of synchronization against disturbances such as voltage sags, sudden load changes, and component failures. Subsequently, we investigate the topology effect on synchronizability in islanded AC MGs for cases involving additional new connections or a unit node. Moreover, we provide an explicit expression of the general algorithm for computing the synchronization rate associated with topology parameters, such as the incidence matrix, weight matrix, and algebraic connectivity, among others, in the MG. The condition for the maximum synchronization rate is also explored. Finally, the accuracy of the theoretical results is validated through several test systems.
When various distributed generation (DG) technologies are integrated into an islanded AC microgrid (MG), the system's heterogeneous characteristics make synchronizing all units within the network more challenging. From the perspective of complex networks, the capability of an islanded MG to achieve synchronization is closely associated with its physical topology. Consequently, a pressing need exists for a theoretical analysis of the network topology's influence on synchronizability in AC MGs. In this paper, we first develop a concise criterion for the synchronization condition of AC MGs and then introduce the definition of the synchronizability index, which measures the robustness of synchronization against disturbances such as voltage sags, sudden load changes, and component failures. Subsequently, we investigate the topology effect on synchronizability in islanded AC MGs for cases involving additional new connections or a unit node. Moreover, we provide an explicit expression of the general algorithm for computing the synchronization rate associated with topology parameters, such as the incidence matrix, weight matrix, and algebraic connectivity, among others, in the MG. The condition for the maximum synchronization rate is also explored. Finally, the accuracy of the theoretical results is validated through several test systems.
Author Xiao, Wenqian
Yu, Chang
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SubjectTerms AC microgrid
Algorithms
Complex networks
Couplings
Distributed generation
Frequency synchronization
Indexes
Network topologies
network topology
Stability criteria
Synchronism
Synchronization
Topology
Voltage sags
Title Synchronizability and Synchronization Rate of AC Microgrids: A Topological Perspective
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