A comprehensive method for break points finding based on expert system for protection coordination in power systems

Abyaneh, Hossein Askarian; Razavi, Farzad; Dabbagh, Hossein A.; Sedeghi, Hossein; Kazemikargar, Hossein

doi:10.1016/j.epsr.2006.06.001

Cited by 14 publications

(10 citation statements)

References 13 publications

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“…In this paper, an expert approach described in [5] is used to determine the network break points. A program based on this method is developed using MATLAB ® .…”

Section: Conditionmentioning

confidence: 99%

“…A program based on this method is developed using MATLAB ® . The procedure of finding break points are as follows [5]: The weighs are calculated based on these expert rules [5]: Table 6 Operating time of r1(main relay) and r6(backup relay) according to different network configuration for proposed method. a) Further relay to the source is given a higher weigh b) Relay on the feeders with higher fault level has a lower weigh c) A higher weigh is considered for the relay with lower operating time (i.e.…”

Section: Conditionmentioning

confidence: 99%

“…Therefore, this procedure needs to be organized. In fact, selecting a minimum set of relays to begin the process using the break points is required for a given network [5].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Optimal co-ordination of overcurrent relays in the interconnected power systems using break points

Meskin

Domijan

Grinberg

2015

Electric Power Systems Research

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“…In this paper, an expert approach described in [5] is used to determine the network break points. A program based on this method is developed using MATLAB ® .…”

Section: Conditionmentioning

confidence: 99%

Section: Conditionmentioning

confidence: 99%

See 1 more Smart Citation

Optimal co-ordination of overcurrent relays in the interconnected power systems using break points

Meskin

Domijan

Grinberg

2015

Electric Power Systems Research

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“…However, difficulties arise in attempting to coordinate relays in a mesh system, especially where overlapping loops are present. As discussed in [12], the complexity of the system increases with the number of loops present in the system. The standard procedure for coordinating relays within a single loop is to cyclically coordinate relays within the loop until the change in the relay setting becomes negligible upon repeating the cycle.…”

Section: Of 17mentioning

confidence: 99%

A Graph Theory Method for Identification of a Minimum Breakpoint Set for Directional Relay Coordination

2019

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The energy grid becomes more complex with increasing penetration of renewable resources, distributed energy storage, distributed generators, and more diverse loads such as electric vehicle charging stations. The presence of distributed energy resources (DERs) requires directional protection due to the added potential for energy to flow in both directions down the line. Additionally, contingency requirements for critical loads within a microgrid may result in looped or meshed systems. Computation speeds of iterative methods required to coordinate loops are improved by starting with a minimum breakpoint set (MBPS) of relays. A breakpoint set (BPS) is a set of breakers such that, when opened, breaks all loops in a mesh grid creating a radial system. A MBPS is a BPS that consists of the minimum possible number of relays required to accomplish this goal. In this paper, a method is proposed in which a minimum spanning tree is computed to indirectly break all loops in the system, and a set difference is used to identify the MBPS. The proposed method is found to minimize the cardinality of the BPS to achieve a MBPS.

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“…As mentioned before, the relay pairs identification is a mandatory requirement for (DOC) relay coordination. Different techniques are proposed in [13], [14], [15], [16], [17], and [18] for relay pairs identification. This paper proposes an analytical method for (DOC) relays coordination in microgrid which is operate in grid connected mode of operations.…”

Section: Introductionmentioning

confidence: 99%

Analytical Method for Directional over Current Relays Coordination in Micro Grids

Abul’Wafa¹,

Mahmoud²,

Mohamed³

2019

IJRTE

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Microgrids are consisting of interconnected loads and distributed generators which can operate with and without utility. The significant implementation of microgrids challenged the protection engineers especially in designing protection microgrid schemes. This challenge comes from the bi-directional fault current variation and the dynamic behavior of microgrids. The implementation of artificial intelligent (AI) techniques for coordinating the directional overcurrent relays (DOCRs) in Microgrids (MGs) is a promising solution. However, all the (AI) techniques estimate the solutions and achieve the objective function after an extensive number of iterations. This paperwork proposes an analytical method for solving the coordination of (DOC) relays in meshed Microgrids which operates in grid connected mode. The proposed analytical method needs a lesser simulation time than the (AI) techniques to find the proper settings for the coordinated directional overcurrent relays (DOCRs). A file code is written using MATLAB software to implement and test this methodology. Index Terms: Analytical methodology, directional overcurrent (DOC) relays coordination, artificial intelligent (AI), microgrids (MGs).

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A comprehensive method for break points finding based on expert system for protection coordination in power systems

Cited by 14 publications

References 13 publications

Optimal co-ordination of overcurrent relays in the interconnected power systems using break points

Optimal co-ordination of overcurrent relays in the interconnected power systems using break points

A Graph Theory Method for Identification of a Minimum Breakpoint Set for Directional Relay Coordination

Analytical Method for Directional over Current Relays Coordination in Micro Grids

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