Dynamic State Estimation for Radial Microgrid Protection

Microgrids are localized electrical grids with control capability that are able to disconnect from the traditional grid to operate autonomously. They strengthen grid resilience, help mitigate grid disturbances, and support a flexible grid by enabling the integration of distributed energy resources....

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Bibliographic Details
Main Authors: Barnes, Arthur K., Mate, Adam
Format: Conference Proceeding
Language:English
Subjects:
distribution network
dynamic state estimation
Fault diagnosis
Impedance measurement
Induction motors
microgrid
Microgrids
Power system dynamics
power system operation
protection
Sensitivity
Time measurement
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Summary:Microgrids are localized electrical grids with control capability that are able to disconnect from the traditional grid to operate autonomously. They strengthen grid resilience, help mitigate grid disturbances, and support a flexible grid by enabling the integration of distributed energy resources. Given the likely presence of critical loads, the proper protection of microgrids is of vital importance; however, this is complicated in the case of inverter-interfaced microgrids where low fault currents preclude the use of conventional time-overcurrent protection. This paper introduces and investigates the application of dynamic state estimation, a generalization of differential protection, for the protection of radial portions of microgrids (or distribution networks); both phasor-based and dynamic approaches are investigated for protection. It is demonstrated through experiments on three case-study systems that dynamic state estimation is capable of correctly identifying model parameters for both normal and faulted operation.
ISSN:2158-4907
DOI:10.1109/ICPS51807.2021.9416613