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

Meskin, Matin; Domijan, A.; Grinberg, Ilya

doi:10.1016/j.epsr.2015.05.007

Cited by 31 publications

(10 citation statements)

References 14 publications

(34 reference statements)

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“…In [10], an analytic approach to optimal coordination of DOCRs was proposed. It has been shown that the conventional optimisation methods such as linear programming (LP) [1, 6, 11], sequential quadratic programming (SQP) [12], quadratically constrained quadratic programming [13], gradient based method [14] and binary integer programming [15] can be applied to optimise DOCR settings. However, conventional optimisation methods have a drawback, some time they may trap to local minima and fails to give global optimal solution.…”

Section: Introductionmentioning

confidence: 99%

Hybrid GSA‐SQP algorithm for optimal coordination of directional overcurrent relays

Radosavljević

Jevtić

2016

IET Generation, Transmission & Distribution

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Section: Introductionmentioning

confidence: 99%

Hybrid GSA‐SQP algorithm for optimal coordination of directional overcurrent relays

Radosavljević

Jevtić

2016

IET Generation, Transmission & Distribution

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“…The binary backup/main matrix ( ) which is given in (17), can be used to remove the repetitive loops. The value of element of this matrix is equal to 1 when OCR is the backup of OCR , otherwise, it will be 0.…”

Section: Modified Depth-first Searchmentioning

confidence: 99%

Determination of optimal breakpoint set of overcurrent relays using modified depth‐first search and mixed‐integer linear programming

Ghotbi-Maleki

Chabanloo

Ebadi

et al. 2020

IET Generation, Transmission & Distribution

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In the process of determination of breakpoints for overcurrent relays (OCR) in power delivery systems, different sets with equal number of OCRs can be selected as minimum breakpoint set (MBPS). Therefore, determination of the most appropriate MBPS is an issue which must be considered. This paper proposes a prioritization between different MBPSs based on the sum of operating times of OCRs. In this case, a set which results the minimum sum of operating times is selected as the appropriate MBPS. For this purpose, the proposed method combines two problems: determination of MBPS and coordination of OCRs, and is expressed in mixed-integer linear programming (MILP) form. Also, a modified depth-first search (DFS) algorithm is applied to determine the OCRs contained loops of studied networks. It is shown that the proposed method has the capability to be combined with previous defined expert rules in this field in order to consider the network conditions in the process of determination of optimal breakpoint set (OBPS). In order to reduce the number of removed coordination constraints, a novel expert rule is added to the existing ones. The proposed method has been implemented on small (8-bus), medium (14-bus and 30-bus) and large (118-bus and 3120-bus) networks, and the results show the effectiveness of proposed method in determining breakpoint set with the least number in first priority and minimum operating times of relays in second priority.

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“…One of the most prominent characteristics of protection systems is selectivity (Meskin et al, 2015) where the correct primary-backup pair is coordinated. This constraint is shown in equation ( 7) where t b,j and t m,i are the operation time of backup and primary relay R i with a delay time of coordination time interval (CTI) which depends on opening time of circuit breaker (t CB ), over travel time t os and a safety factor time t saf (IEEE Std.…”

Section: Ec 353mentioning

confidence: 99%

Optimal overcurrent relay coordination in distribution network based on Lightning Flash Algorithm

Kheshti

Kang

2018

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Purpose Distribution network protection is a complicated problem and mal-operation of the protective relays due to false settings make the operation of the network unreliable. Besides, obtaining proper settings could be very complicated. This paper aims to discuss an innovative evolutionary Lightning Flash Algorithm (LFA) which is developed for solving the relay coordination problems in distribution networks. The proposed method is inspired from the movements of cloud to ground lightning strikes in a thunderstorm phenomenon. LFA is applied on three case study systems including ring, interconnected and radial distribution networks. The power flow analysis is performed in Digsilent Power Factory software; then the collected data are sent to MATLAB software for optimization process. The proposed algorithm provides optimum time multiplier setting and plug setting of all digital overcurrent relays in each system. The results are compared with other methods such as particle swarm optimization and genetic algorithm. The result comparisons demonstrate that the proposed LFA can successfully obtain proper relay settings in distribution networks with faster speed of convergence and lower total operation time of relays. Also, it shows the superiority and effectiveness of this method against other algorithms. Design/methodology/approach A novel LFA is designed based on the movements of cloud to ground lightning strikes in a thunderstorm. This method is used to optimally adjust the time multiplier setting and plug setting of the relays in distribution system to provide a proper coordination scheme. Findings The proposed algorithm was tested on three case study systems, and the results were compared with other methods. The results confirmed that the proposed method could optimally adjust the relay settings in the electric distribution system to provide a proper protection scheme. Practical implications The practical implications can be conducted on distribution networks. The studies provided in this paper approve the practical application of the proposed method in providing proper relay protection in real power system. Originality/value This paper proposes a new evolutionary method derived from the movements of cloud to ground lightning strikes in thunderstorm. The proposed method can be used as an optimization toolbox to solve complex optimization problems in practical engineering systems.

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

Cited by 31 publications

References 14 publications

Hybrid GSA‐SQP algorithm for optimal coordination of directional overcurrent relays

Hybrid GSA‐SQP algorithm for optimal coordination of directional overcurrent relays

Determination of optimal breakpoint set of overcurrent relays using modified depth‐first search and mixed‐integer linear programming

Optimal overcurrent relay coordination in distribution network based on Lightning Flash Algorithm

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