Synchronous islanded operation of an inverter interfaced renewable rich microgrid using synchrophasors

Meegahapola, L, Laverty, D and Jacobsen, M 2018, 'Synchronous islanded operation of an inverter interfaced renewable rich microgrid using synchrophasors', IET Renewable Power Generation, vol. 12, no. 4, pp. 407-414.


Document type: Journal Article
Collection: Journal Articles

Title Synchronous islanded operation of an inverter interfaced renewable rich microgrid using synchrophasors
Author(s) Meegahapola, L
Laverty, D
Jacobsen, M
Year 2018
Journal name IET Renewable Power Generation
Volume number 12
Issue number 4
Start page 407
End page 414
Total pages 8
Publisher Institution of Engineering and Technology
Abstract This study describes a novel strategy for microgrid operation and control, which enables a seamless transition from grid connected mode to islanded mode, and restoration of utility supply, without loss or disruption to loads sensitive to frequency or phase angle dynamics. A simulation study is conducted on a microgrid featuring inverter connected renewable generation, and power electronic interfaced loads. Therefore, the microgrid inherently has low inertia, which would subsequently affect the dynamic characteristics of the microgrid, in particular during mode transition. The microgrid is controlled by means of synchrophasor data to achieve synchronous island operation, enabling the microgrid to track the utility frequency and phase angle. The simulation includes synchrophasor acquisition and telecoms delays, allowing for detailed investigation of the microgrid dynamics under various mode transition scenarios, including the risk of commutation failure of the inverter sources. The proposed method is demonstrated to successfully maintain a microgrid in synchronism with the main utility grid after the transition to islanded mode without significant impact on various equipment connected to the microgrid. Thus, synchronous island operation of low inertia microgrids is feasible. This study also showed that utility supply could be seamlessly restored if the microgrid is operated as a synchronous island.
Subject Renewable Power and Energy Systems Engineering (excl. Solar Cells)
Power and Energy Systems Engineering (excl. Renewable Power)
Keyword(s) Distributed Power Generation
Invertors
Phasor Measurement
Low Inertia Microgrids
Main Utility Grid
Inverter Sources
Commutation Failure
Mode Transition Scenarios
Utility Frequency
Synchrophasor Data
Dynamic Characteristics
Power Electronic Interfaced Loads
Inverter Connected Renewable Generation
Phase Angle Dynamics
Utility Supply
Grid Connected Mode
Microgrid Control
Microgrid Operation
Inverter Interfaced Renewable Rich Microgrid
Synchronous Islanded Operation
DOI - identifier 10.1049/iet-rpg.2017.0406
Copyright notice © The Institution of Engineering and Technology 2017
ISSN 1752-1416
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