Impact of distributed generator controllers on the coordination of overcurrent relays in microgrid

Choudhary, Niraj Kumar; Mohanty, Soumya R.; Singh, Ravindra Kumar

doi:10.3906/elk-1603-197

Cited by 6 publications

(6 citation statements)

References 28 publications

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“…Therefore, power grid protection systems may be affected. The type of DG and the characteristics of the distribution network have a significant effect on the coordination of the protection [11]. The consequences related to the connection of distributed generators to the network are nuisance tripping, blinding of protections and loss of coordination of the protection relays.…”

Section: Docrs Coordination With Dgsmentioning

confidence: 99%

“…Despite its many advantages, these generators have several impacts on electrical network parameters [9], namely the impact on power flow and the modification of fault current values [10] that can affect the operation of electrical network protection schemes. This influence can result in reduced system reliability, increased corrective maintenance costs and poor coordination between existing protective relays in the network [11]. The loss of coordination can lead to unnecessary disconnection of the healthy part of the network, damage to electrical equipment, and larger fault zones [12].…”

Section: Introductionmentioning

confidence: 99%

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Comparative study of optimization methods for optimal coordination of directional overcurrent relays with distributed generators

Idrissi

Haidi²,

Elmariami³

et al. 2023

IJ-AI

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<span lang="EN-US">Due to the growing penetration of distributed generators (DGs), that are based on renewable energy, into the distribution network, it is necessary to address the coordination of directional overcurrent relays (DOCR) in the presence of these generators. This problem has been solved by many metaheuristic optimization techniques to obtain the optimal relay parameters and to have an optimal coordination of the protection relays by considering the coordination constraints. In this article, a comparative study of the optimization techniques proposed in the literature addresses the optimal coordination problem using digital DOCRs with standard properties according to IEC60-255. For this purpose, the three most efficient and robust optimization techniques, which are particle swarm optimization (PSO), genetic algorithm (GA) and differential evolution (DE), are considered. Simulations were performed using MATLAB R2021a by applying the optimization methods to an interconnected 9-bus and 15-bus power distribution systems. The obtained simulation results show that, in case of distributed generation, the best optimization method to solve the relay protection coordination problem is the differential evolution DE. </span>

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Section: Docrs Coordination With Dgsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparative study of optimization methods for optimal coordination of directional overcurrent relays with distributed generators

Idrissi

Haidi²,

Elmariami³

et al. 2023

IJ-AI

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“…A new protection coordination scheme is proposed in [14], [38] based on double parameter DOCRs. When the fault current flows in the forward direction, the relay will operate as primary protection and when the fault current flows in the reverse direction, the relay will operate as backup protection.…”

Section: Dual Setting Protection Schemesmentioning

confidence: 99%

“…Dual adjustable directional overcurrent relays are offered in [14], [38], to protect DG meshed distribution systems. The settings of the dual setting relays depend on the direction of the fault, the relays are equipped with two pairs of settings, one of them for the primary protection and the other for the backup protection, for both possible directions.…”

mentioning

confidence: 99%

Impact of distributed power generation on protection coordination in distribution network

Idrissi

Mariami

Belfqih

et al. 2021

IJEECS

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<p>In the whole world and especially in Morocco, the electric power sector faces significant challenges and the demand for energy is increasing as fossil fuel sources are disappearing. Moreover, the high cost of construction of large production plants and the obligation to reduce greenhouse gas emissions are among the factors pushing the energy sector to integrate distributed generators DGs based on renewable energies into power grids. However, the integration of these generators increased the values of short-circuit currents in the network, which poses a real threat to the existing protection coordination systems in the distribution network. The aim of this article is to bring together in a single platform all available research addressing the issue of protection coordination in the presence of DGs in the distribution network, in order to help researchers identify future scope. This paper presents a review of the impact of distributed generators on the protection coordination of distribution networks. The solutions proposed in the literature, to mitigate the negative impact of DGs, have been investigated in detail, along with the limitations of these proposed techniques.</p>

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“…However, augmenting the short circuit level in distribution networks due to high penetration of DG is inevitable. The consequent need for higher equipment ratings and encountering miscoordination of overcurrent relays are the main disadvantages of DG installation, which is mainly associated with the increased short circuit level [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Optimal coordination of overcurrent protection in the presence of SFCL and distributed generation

AsghariGovar¹,

Seyedi²,

Dibazari³

2018

Turk J Elec Eng & Comp Sci

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As power demand is increased, power generation and especially distributed generation (DG) are being developed. Therefore, power distribution systems become increasingly complicated and short circuit level in distribution grids is being augmented. Thereby, installation of a superconducting fault current limiter (SFCL) is a logical solution to decrease the fault current level in a distribution network. Preventing distribution system degradation by high fault currents, lower equipment ratings, and economic issues are the advantages of SFCL in distribution grids. However, SFCL installation causes delayed operation of the existing overcurrent protection and requires recoordination of the relays. In addition, disconnecting the SFCL from the distribution circuit due to maintenance leads to miscoordination between the overcurrent relays. In this research work, a genetic algorithm (GA) is used to achieve optimal protection coordination in the presence of both SFCL and DG. Furthermore, the uncertainty associated with the connection status of SFCL and DGs, which are reflected in the protection coordination, is investigated in detail. Moreover, various overcurrent relay characteristics, such as long-time inverse, extremely inverse, very inverse, and normally inverse, are used in a test power system, and remarkable computation results will be shown and discussed in the next parts of the paper.

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Impact of distributed generator controllers on the coordination of overcurrent relays in microgrid

Cited by 6 publications

References 28 publications

Comparative study of optimization methods for optimal coordination of directional overcurrent relays with distributed generators

Comparative study of optimization methods for optimal coordination of directional overcurrent relays with distributed generators

Impact of distributed power generation on protection coordination in distribution network

Optimal coordination of overcurrent protection in the presence of SFCL and distributed generation

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