Implementing Admittance Relaying for Microgrid Protection

Barnes, Arthur K.; Máté, Ádám

doi:10.1109/icps51807.2021.9416600

Cited by 7 publications

(2 citation statements)

References 7 publications

(17 reference statements)

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“…This provides a valid location if it is not greater than the length of the investigated line; otherwise, another section is then evaluated. Reference [92] develops a fault detection technique for MGs based on monitoring the changes in magnitude and phase difference of bus admittances to consider the protection of bus loads, not only interconnecting lines [92,93].…”

Section: Distance Protectionmentioning

confidence: 99%

Comparative framework for AC-microgrid protection schemes: challenges, solutions, real applications, and future trends

Sheta

Abdulsalam

Sedhom

et al. 2023

Prot Control Mod Power Syst

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With the rapid development of electrical power systems in recent years, microgrids (MGs) have become increasingly prevalent. MGs improve network efficiency and reduce operating costs and emissions because of the integration of distributed renewable energy sources (RESs), energy storage, and source-load management systems. Despite these advances, the decentralized architecture of MGs impacts the functioning patterns of the entire system, including control strategy, energy management philosophy, and protection scheme. In this context, developing a convenient protection strategy for MGs is challenging because of various obstacles, such as the significant variance in short-circuit values under different operating modes, two-way power flow, asynchronous reclosing, protection blinding, sympathetic tripping, and loss of coordination. In light of these challenges, this paper reviews prior research on proposed protection schemes for AC-MGs to thoroughly evaluate network protection's potential issues. The paper also provides a comprehensive overview of the MG structure and the associated protection challenges, solutions, real applications, and future trends.

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Section: Distance Protectionmentioning

confidence: 99%

Comparative framework for AC-microgrid protection schemes: challenges, solutions, real applications, and future trends

Sheta

Abdulsalam

Sedhom

et al. 2023

Prot Control Mod Power Syst

View full text Add to dashboard Cite

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“…This can be a challenge in electrical grids with distributed generation on account of lack of fault current from inverter-interfaced generation [7], varying fault current between grid-connected and islanded modes [7], and the potential for normally-meshed operation [8] and unbalanced operation due to single-phase loads [8]. Admittance relaying has been investigated as a solution for the protection of microgrids [9], however, it has been observed to present issues with groundedwye connected loads [10]; consequently, additional relaying is necessary to prevent misoperation [8].…”

Section: Introductionmentioning

confidence: 99%

Dynamic State Estimation for Radial Microgrid Protection

Barnes¹,

Máté²

2021

Preprint

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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.

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