A communication-free active unit protection scheme for inverter dominated islanded microgrids

Khan, Asif; Hong, Qiteng; Egea‐Àlvarez, Agustí; Booth, Campbell

doi:10.1016/j.ijepes.2022.108125

Cited by 10 publications

(7 citation statements)

References 21 publications

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“…Injected fifth-harmonic current is employed in [128] to define faults in MGs, in which the injected component activates related digital relays to decide the fault event when it surpasses a specified value, overcoming the insensitivity of traditional relays to low fault currents in islanded MGs. In contrast, reference [129] suggests a communication-free protection scheme based on injecting multiple harmonics to recognize faults in grid-connected and islanded modes. Once the fault is detected, all the inverter-based DERs reduce their current contribution and deliberately inject a particular harmonic component to trigger the protective relays.…”

Section: Harmonic Content-based Schemesmentioning

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: Harmonic Content-based Schemesmentioning

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 set of PEIRESs is also applied for parts B, C, D, and E in this section. Buses 3,5,8,11,14,16,19,23,25,27,29 and 39 are equipped with PMUs [36], which are also valid for parts B, C, D and F. The model and other parameters of simulated PEIRESs are listed in the Appendix.…”

Section: A General Evaluation Of the Proposed Schemementioning

confidence: 99%

“…There are some efforts in the literature to incorporate PEIRESs in WABP schemes. A communication-free active protection strategy for the inverter-dominated power systems is presented in [25], which is only applicable for islanded microgrids. In [26], a WABP scheme is presented as a supervisory algorithm for distance relay, which requires a specific set of PMU measurements.…”

Section: Introductionmentioning

confidence: 99%

Wide-Area Backup Protection Against Asymmetrical Faults in the Presence of Renewable Energy Sources

2022

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“…As discussed previously, the different fault characteristics introduced by converters' control is one of the main causes for the risk of compromised protection performance. Therefore, there have been increasing research activities, focusing on the refinement of the converter control in order to support protection operation, which is referred to as control-based protection solutions [4,[9][10][11][12][13][14]. Recent studies have revealed that, converter control can be designed and implemented in a manner that can effectively facilitate the protection operation, offering a promising solution to address the aforementioned protection challenges [2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Review and Evaluation of Control-Based Protection Solutions for Converter-Dominated Power Systems

Cao

Hong

Liu

et al. 2023

2023 IEEE Belgrade PowerTech

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With the rapid and massive increase of converterinterfaced resources (e.g. renewable generation, HVDC systems, etc.), the dynamic behavior of future power systems is expected to change significantly and will be predominantly determined by converters' control strategies. As a result, the performance of conventional protection schemes can be severely compromised due to the new and different fault characteristics introduced by converters. Recent studies reveal that, converter control could be designed in a manner, e.g. to intentionally inject certain fault signature or sequence components, that can effectively facilitate the protection operation, offering a promising solution to address the aforementioned protection challenges. While the control-based protection solutions have increasingly been investigated by the research community, there is no comprehensive comparison and evaluation of different proposed approaches. Therefore, this paper presents a comprehensive state-of-the-art review and evaluation of converter control-based solutions for addressing protection challenges, which covers approaches based on active signal injections, symmetrical component control, and integrated control and protection. Case studies of selected control-based solutions are presented, where the virtual impedance-based Grid-Forming (GFM) control is compared with dual-sequence current-based Grid-Following (GFL) control for distance protection, and it was found that GFM control can more effectively support the distance protection operation.

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A communication-free active unit protection scheme for inverter dominated islanded microgrids

Cited by 10 publications

References 21 publications

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

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

Wide-Area Backup Protection Against Asymmetrical Faults in the Presence of Renewable Energy Sources

Review and Evaluation of Control-Based Protection Solutions for Converter-Dominated Power Systems

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