A new approach for optimal coordination of distance and directional over-current relays using multiple embedded crossover PSO

Farzinfar, Mehdi; Jazaeri, Mostafa; Razavi, Farzad

doi:10.1016/j.ijepes.2014.04.001

Cited by 63 publications

(44 citation statements)

References 22 publications

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“…The setting of third‐zone relay ideally will cover the primary line, plus all of the longest line leaving the remote bus. Typically, the coordination between the first zone with the second and third zones is done by considering a delay time in trip outputs with 15 to 40 cycles for the second zone and about 40 cycle for the third zone …”

Section: The Proposed Protection Schemementioning

confidence: 99%

“…The position of F5 is dependent on in‐feed and out‐feed current from connected feeders to the terminal. To avoid this issue, in‐feed and out‐feed should be considered in calculating of the second zone setting and obtaining the critical point F5 . Typically, the setting associated with this point is calculated based on the presented method in other studies …”

Section: The Proposed Protection Schemementioning

confidence: 99%

“…Heuristic algorithms are relatively quick and good candidates to determine optimal/near‐optimal solutions. They are implemented for the same mission in other works . It is proven that effective tuning of heuristic algorithms can serve the purpose of offering fast response protection .…”

Section: Introductionmentioning

confidence: 99%

“…However, the instantaneous function is not recommended to be used in transmission and subtransmission systems . Moreover, the presented scheme suffers from miscoordinations owing to consideration of the fixed second zone timing for distance relays . Although the investigated literatures have improved protection coordination (PC) metrics, still attaining a more reliable and faster protection system based on numerical relays is under investigation.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Coordination of mixed distance and directional overcurrent relays: Miscoordination elimination by utilizing dual characteristics for DOCRs

Yazdaninejadi

Nazarpour

Talavat

2018

Int Trans Electr Energ Syst

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Summary Keeping selectivity among protective devices in electrical grids is of crucial importance. This task in the combinatorial protection scheme of distance and directional overcurrent relays (DOCRs) stands as a complicated problem, especially in interconnected networks. To overcome this issue, this paper proposes an enhanced protection coordination (PC) scheme by employing dual time‐current characteristics (D‐TCCs) for overcurrent relays which are followed by two inverse‐time curves in series. These characteristics simplify the complexity of the problem and yield higher flexibility and extensibility in PC process which helps to meet selectivity requirements. However, these characteristics can be implemented by numerical DOCRs which poses investment costs. Therefore, a techno‐economic optimal replacement model is devised to attain a least‐cost numerical DOCRs deployment plan while eliminating miscoordination and minimizing total operation time of the relays. Furthermore, inverse‐time curves of DOCRs are selected optimally among available options for conventional relays. By doing so, the attained flexibility is intensified which lessens imparted economic burden through alleviating the replacement level of numerical DOCRs. The proposed approach calls the need for making amendments in coordination points to handle coordination problem in the case where both conventional DOCRs and numerical DOCRs with D‐TCCs are present. Therefore, coupled with the conventional selectivity constraints, the constraint associated with new coordination points are all together accommodated in the optimization process. The proposed model demonstrates a mixed integer nonlinear programming fashion which is solved with sine‐cosine algorithm. Several numerical studies are carried out to interrogate the validity of the proposed approach. The obtained results are encouraging.

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Section: The Proposed Protection Schemementioning

confidence: 99%

Section: The Proposed Protection Schemementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Coordination of mixed distance and directional overcurrent relays: Miscoordination elimination by utilizing dual characteristics for DOCRs

Yazdaninejadi

Nazarpour

Talavat

2018

Int Trans Electr Energ Syst

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“…, v(m)] at each generation of movement changes based on the last optimum particles [37]. After several generations, only the 'most optimal' particles can transmit information to other particles, making the optimization very fast in comparison to other evolutionary techniques [38,39]. …”

Section: Solution Approachmentioning

confidence: 99%

An Entropy Based Bayesian Network Framework for System Health Monitoring

Parhizkar

Balali

Mosleh

2018

Entropy

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Oil pipeline network system health monitoring is important primarily due to the high cost of failure consequences. Optimal sensor selection helps provide more effective system health information from the perspective of economic and technical constraints. Optimization models confront different issues. For instance, many oil pipeline system performance models are inherently nonlinear, requiring nonlinear modelling. Optimization also confronts modeling uncertainties. Oil pipeline systems are among the most complicated and uncertain dynamic systems, as they include human elements, complex failure mechanisms, control systems, and most importantly component interactions. In this paper, an entropy-based Bayesian network optimization methodology for sensor selection and placement under uncertainty is developed. Entropy is a commonly used measure of information often been used to characterize uncertainty, particularly to quantify the effectiveness of measured signals of sensors in system health monitoring contexts. The entropy based Bayesian network optimization outlined herein also incorporates the effect that sensor reliability has on system information entropy content, which can also be related to the sensor cost. This approach is developed further by incorporating system information entropy and sensor costs in order to evaluate the performance of sensor combinations. The paper illustrates the approach using a simple oil pipeline network example. The so-called particle swarm optimization algorithm is used to solve the multi-objective optimization model, establishing the Pareto frontier.

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Evaluation of the impacts of relay coordination on power system reliability

Jazaeri

Farzinfar

Razavi

2014

Int. Trans. Electr. Energ. Syst.

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Summary The security and reliability of a power system rely on establishing and maintaining proper coordination among protective relays. In addition to interrupting unnecessary loads, the probability of exposing hidden failures in protection system components such as Circuit Breakers (CBs) may increase as a consequence of miscoordination among relays. In order to evaluate how malfunction of a protection system can degrade the reliability of the system, this paper proposes a new Markov Chain Monte Carlo (MCMC) algorithm. Furthermore, to consider the impact of relay miscoordination on the hidden failure of protection systems, the paper proposes a failure index which is contingent on the magnitude and duration of fault currents. Then, for a sample test system, the reliability indices of SAIDI, EENS, and ECOST are obtained for three scenarios with different relay settings and coordination. The results are then compared to show that how protection miscoordination in medium‐voltage networks degrades the reliability level of the system. Copyright © 2014 John Wiley & Sons, Ltd.

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A new approach for optimal coordination of distance and directional over-current relays using multiple embedded crossover PSO

Cited by 63 publications

References 22 publications

Coordination of mixed distance and directional overcurrent relays: Miscoordination elimination by utilizing dual characteristics for DOCRs

Coordination of mixed distance and directional overcurrent relays: Miscoordination elimination by utilizing dual characteristics for DOCRs

An Entropy Based Bayesian Network Framework for System Health Monitoring

Evaluation of the impacts of relay coordination on power system reliability

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