An Improved Priority-Based Load Shedding Scheme in Hybrid AC/DC Microgrids Using Micro-PMUData

Zare, Farzaneh Dorabadi; Kargar, Hossein Kazemi; Salemnia, Ahmad

doi:10.1109/icee50131.2020.9261012

Cited by 3 publications

(3 citation statements)

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“…2) Timer Based Load Shedding Scheme: The timer-based load shedding strategy [10], [13] uses a common voltage threshold and prioritizes the non-critical loads using different time delays. Whenever the voltage falls below the common voltage threshold for a period of time greater than the time delay, the load is shed.…”

Section: B Non-communication-based Load-shedding Schemesmentioning

confidence: 99%

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Comparison of Non-Communication based DC Load Shedding Schemes

Babagana

Zaman

Seferi

et al. 2022

2022 57th International Universities Power Engineering Conference (UPEC)

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Whenever the total power that can be provided by the distributed energy resources (DERs) is less than the total power demand of the loads, the DC bus voltages start to fall which could lead to power collapse. This paper investigates and compares the performances of the existing non-communication based (decentralized) load shedding schemes in a direct current (DC) microgrid to protect the integrity of the microgrid under a large disturbance. The simulation is carried out in a Matlab environment with various forms of load and distributed energy resources on an IEEE 37 AC Node converted to DC. The findings show that the conventional load shedding scheme could expose critical loads to substantial and lengthy voltage sags. Voltage sags and over-shedding of load could be resolved using combined load shedding scheme. The adaptive schemes minimise the duration and magnitude of voltage drop by utilizing the rate of change of voltage (ROCOV) to achieve a more reliable assessment of the microgrid operating conditions and determine the appropriate load shedding voltage thresholds and time delays. All the schemes could not achieve an optimal load shedding, this work therefore leads to the need for more advanced load shedding schemes that can shed load optimally for future DC microgrids.

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Section: B Non-communication-based Load-shedding Schemesmentioning

confidence: 99%

“…The total generation of 6 due to the short time delays used. However, using excessively short delays may cause unnecessary load shedding [13].…”

Section: B Timer Based Load Sheddingmentioning

confidence: 99%

Comparison of Non-Communication based DC Load Shedding Schemes

Babagana

Zaman

Seferi

et al. 2022

2022 57th International Universities Power Engineering Conference (UPEC)

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“…Several researchers in recent years have proposed fresh methods for regulated island development. Here are a few examples: the tabu search algorithm [4,5]. However, the explanation provided is somewhat scant.…”

Section: Introductionmentioning

confidence: 99%

Metaheuristic Approach for Controlled Islanding in Power Systems based on Load Shedding Scheme

Rao Balasani

2023

IJSMEM

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In the event that there is a catastrophic loss, one precaution that may be taken to decrease the likelihood of blackouts is the controlled islanding of the electrical system. This can be done to keep the power on for as long as possible. Managed islanding will result in just a limited percentage of islands being selfsufficient and capable of doing day-to-day duties without assistance from outside sources. On the other side, when islanding is implemented, not every island will have balanced generation and load. It is necessary for it to implement an effective load-shedding technique in order to encounter the power equilibrium criteria so that it can perform the functions of a balanced autonomous island. The method known as discrete evolutionary programming, or DEP, was modified for the purposes of this study in order to provide a metaheuristic that is founded on the load shedding scheme. This plan was devised to determine how much electricity should be taken from the grid in order to generate islands that are capable of supporting themselves without outside assistance. We are able to validate that the load shedding technique that has been provided is efficient by comparing it to the conventional EP method as well as the comprehensive search methodology. According to the findings, when compared to traditional EP and exhaustive search techniques. When compared side by side, these two strategies are quite different from one another.

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