Investigation of the performance of ROCOF-based lom protection in distribution networks with virtual synchronous generators

Patsidis, A.; Tzelepis, Dimitrios; Booth, Campbell

doi:10.1049/cp.2020.0066

Cited by 3 publications

(2 citation statements)

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“…Passive IDMs are typically categorized into classic and advanced methods. Classic methods, such as the frequency and voltage threshold method (FVT) ANSI 81U/O and ANSI 27/59, rate of change of frequency (RoCoF) method ANSI 81R, and voltage vector shift (VVS) detection method [35][36][37]. They are the methods most commonly used currently in many distribution systems with high penetration of DERs [10,38,39].…”

Section: Literature Review Of Islanding Detection Methodsmentioning

confidence: 99%

Bayesian Entropy Methodology: A Novel Approach to Setting Anti-Islanding Protections with Enhanced Stability and Sensibility

Seguin Batadi,

Martínez,

Molina

2024

Energies

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The risk of unintentional islanding creation in distributed energy systems poses a significant security concern since unintentional islanding formation could lead to a supply of energy outside of the optimal quality limits. This constitutes a risk for users, maintenance personnel, infrastructure, and devices. To mitigate this problem, anti-islanding protections are widely used to prevent the distributed generator from feeding a portion of the radial distribution grid when a protection device trips upstream. However, the effectiveness of these protections heavily relies on properly tuning protection setting thresholds (such as time delay and pickup). This work proposes a novel approach that utilizes entropy as a model and metric of the uncertainty associated with a particular protection setting. By minimizing entropy, the proposed method aims to improve stability and sensitivity, consequently improving the overall performance of anti-islanding protection. Simulation results demonstrate that the Bayesian entropy methodology (BEM) approach achieves enhanced stability in various scenarios, including frequency transients, and demonstrates a notable reduction in the size of the dataset and computational burden, ranging between 91% and 98%, when compared to related works, with an improvement of the uncertainty achieved. The findings of this study contribute to the development of more robust and reliable anti-islanding protections.

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Section: Literature Review Of Islanding Detection Methodsmentioning

confidence: 99%

Bayesian Entropy Methodology: A Novel Approach to Setting Anti-Islanding Protections with Enhanced Stability and Sensibility

Seguin Batadi,

Martínez,

Molina

2024

Energies

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“…Grid-tied dispersed generation islanding takes place when a portion of the network that encompasses generators is detached from the central system, while independent distribution generation keeps on powering the utility lines in the isolated segment (termed as an island) [19] To protect the power plant against the islanded operation, according to the Grid code [20], it is necessary to:…”

Section: Protection Coordinationmentioning

confidence: 99%

Protection Coordination of Photovoltaic Power Plant in the Time Domain

Čolak,

Nikolovski,

Kljajić

et al. 2024

adeletters

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The safety of workers and equipment in the power grid requires the shutdown of power plants in case of maintenance or malfunction. The shutdown relies on protective devices that must be properly coordinated to isolate only the part of the grid affected by the malfunction. Using the DIgSILENT PowerFactory software, an analysis was conducted on a model of an accurate real grid integrating a photovoltaic power plant with a capacity of 390 kW. Protection coordination testing was carried out for three-phase, two-phase, and single-phase short circuit currents at arbitrarily selected locations at medium and low voltage levels. Protection in the time domain is coordinated on lines and busbars to determine the speed and selectivity of protective devices. The analysis results indicate that adequately adjusting the three-phase short circuit at the main transformer output 110/10 kV with an impedance of 0 Ω and an allowed protection operation time of up to two seconds can be correctly addressed within 36.7 ms.

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Aspects of grid-connected converters and their inherent influence on the power grid

Brestan,

Schuerhuber

2023

2023 23rd International Scientific Conference on Electric Power Engineering (EPE)

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Investigation of the performance of ROCOF-based lom protection in distribution networks with virtual synchronous generators

Cited by 3 publications

References 0 publications

Bayesian Entropy Methodology: A Novel Approach to Setting Anti-Islanding Protections with Enhanced Stability and Sensibility

Bayesian Entropy Methodology: A Novel Approach to Setting Anti-Islanding Protections with Enhanced Stability and Sensibility

Protection Coordination of Photovoltaic Power Plant in the Time Domain

Aspects of grid-connected converters and their inherent influence on the power grid

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