Modelling and analysis of a synchronous machine-emulated active intertying converter in hybrid AC/DC microgrids

The integration of renewable energy resources into the electrical distribution systems faces several stability challenges especially in the low inertia conditions. To address these issues, this study introduces a virtual synchronous machine (VSM) control strategy for the intertying power electronic...

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Bibliographic Details
Published in:IET generation, transmission & distribution transmission & distribution, 2018-06, Vol.12 (11), p.2539-2548
Main Authors: Alrajhi Alsiraji, Hasan, Radwan, Amr Ahmed A, El-Shatshat, Ramadan
Format: Article
Language:English
Subjects:
AC‐DC power convertors
autonomous AC‐DC hybrid microgrid
bidirectional power flow
damping
distributed power generation
electric current control
electrical distribution system
emulated active intertying power electronic converter
energy management systems
load flow control
machine control
power control
power generation control
power generation faults
power management regulation topology
power system management
PSCAD‐EMTDC environment
renewable energy resource
Research Article
small‐signal state‐space model
stability
synchronous machine
synchronous machines
system damping
time‐domain analysis
time‐domain simulation
virtual synchronous machine control strategy
VSM control strategy
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Summary:The integration of renewable energy resources into the electrical distribution systems faces several stability challenges especially in the low inertia conditions. To address these issues, this study introduces a virtual synchronous machine (VSM) control strategy for the intertying power electronic converters in the autonomous AC/DC hybrid microgrids. It is shown that the VSM-based controller improves the system damping following the frequency disturbances and the AC/DC voltage variations. Moreover, a power management regulation topology is implemented in the active intertying converter to achieve an accurate bidirectional power flow under different loading conditions. A small-signal state-space model for the entire hybrid system is developed to assess the overall system performance. Time-domain simulation results under the PSCAD/EMTDC environment are also presented to investigate the effectiveness of the proposed techniques. The introduction of the VSM control for the intertying converters in the hybrid AC/DC microgrids provides a significant improvement in the dynamic performance and increases the robustness against external disturbances.
ISSN:1751-8687
1751-8695
1751-8695
DOI:10.1049/iet-gtd.2017.0734