Optimal coordination of directional overcurrent relay based on combination of Firefly Algorithm and Linear Programming

Ramli, Suzana Pil; Mokhlis, Hazlie; Wong, Wei Ru; Muhammad, Munir Azam; Mansor, Nurulafiqah Nadzirah

doi:10.1016/j.asej.2022.101777

Cited by 24 publications

(20 citation statements)

References 45 publications

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“…Additional information regarding the used network can be found in [28]. The CTI value is chosen to be 0.2 s [14, 19, 29]. Furthermore, 0.05 and 1.1 have been set as the lower and upper boundaries of TMS, respectively.…”

Section: Case Studies and Resultsmentioning

confidence: 99%

“…The CTI value is chosen to be 0.2 s [14,19,29]. Furthermore, 0.05 and 1.1 have been set as the lower and upper boundaries of TMS, respectively.…”

Section: Ieee Eight Bus Systemmentioning

confidence: 99%

“…In [13], the most significant impacts of DG on protection devices are analysed and a linear programming (LP)‐based adjustment method is used for OCRs to improve their response time to network main feeder faults. The research conducted in [14] employs a hybrid optimization algorithm, namely the Firefly Algorithm and linear programming (FA‐LP), in order to optimize the coordination of distributed optimal current references. This is achieved by linearizing equations, which facilitates a more efficient exploration of the search space.…”

Section: Introductionmentioning

confidence: 99%

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Optimal overcurrent relay coordination: Balancing costs, time performance and generator placement in fault current limiter optimization

Mohamedshareef,

Abapour,

Hosseini

et al. 2024

IET Generation Trans & Dist

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The integration of synchronous generators (SG) to the grid will present serious problems in some instances. The increase in fault current level is one of the most crucial issues, which causes miscoordination between directional over current relays (DOCRs), in addition to putting excessive pressure on the circuit breakers. This research uses the Fault Current Limiters (FCL) to restore coordination, without changing the settings of DOCRs, by reducing the level of fault current in the grid. The main goal of this research is to find the optimal size, location, and number of FCLs at the minimum cost and with the least operation time for the relays, using Jellyfish Search Optimisation (JSO) algorithm. This can be achieved through three different approaches. The first one is optimizing the location, number, and impedance size of the FCL by minimising a cost function. The second approach involves optimizing the backup relay operation time. A combination of the two previous approaches is used as the third approach. The outstanding feature of this research is that it considers the optimal location of DG and FCL while optimizing the operation times of DOCRs, which is a new framework.

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Section: Case Studies and Resultsmentioning

confidence: 99%

“…The CTI value is chosen to be 0.2 s [14,19,29]. Furthermore, 0.05 and 1.1 have been set as the lower and upper boundaries of TMS, respectively.…”

Section: Ieee Eight Bus Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optimal overcurrent relay coordination: Balancing costs, time performance and generator placement in fault current limiter optimization

Mohamedshareef,

Abapour,

Hosseini

et al. 2024

IET Generation Trans & Dist

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“…Curve fitting is easy for establishing OCRs settings. However, errors in the protection scheme may occur if the PSC is violated fewer than 1.3 times [18], [27], [28], [52]. Similar to that, a graph theoretical approach built on the breakpoint concept was employed [27], [53], [54].…”

Section: A Conventional Methods Of Protectionmentioning

confidence: 99%

The Recent Development of Optimal DOCR Protection Strategies for Sustainable Power Systems via Computational Intelligence Techniques

et al. 2022

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In the past decade, there has been unprecedented growth in distributed generation (DG) to cater to more load demand in the power grid. However, as the volume of these resources in the distribution network (DN) continues to increase, new challenges in voltage regulation, system stability, and protection coordination have emerged. The system is substantially changed when multiple types of DGs are incorporated into DN. These include new fault condition sources, different fault stages, a blinding influence on the protection scheme, a decrease in the relays' range, and a decline in the ability of existent relays to detect low-level fault currents. Due to the bidirectional current flow, this raises the fault current and, if improperly coordinated, causes the relays to trip unintentionally. Since fault current can flow in either direction (i.e. upstream or downstream), it is crucial that grid-mounted relays can detect it. This goal can be reached by including an optimal directional overcurrent relay (DOCR) coordination scheme in the system. In fact, DOCRs in interconnected power grids need to be coordinated effectively. This paper gives a comprehensive overview of the uses of various optimization strategies. The evaluation examines the benefits and drawbacks of the strategies used to address DOCR coordination problems. Additionally, this paper discusses future lines of inquiry for optimum DOCR coordination.INDEX TERMS Computational intelligence, directional overcurrent relay, distributed generation, distribution network, renewable energy resources. NOMENCLATURE TMS mTime multiplier setting. ROT RCOT ,k Characteristic operational time DOCR. TMS minMinimum range of time multiplier setting.

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“…Te relays' operating time range is considered between 0.04-1.1 sec. Te range of TMS are limited from 0.05-1.1 sec., while the PS lies between 1.25-1.5 and the minimum value of CTI is considered 0.2 sec [39].…”

Section: Optimal Coordinationmentioning

confidence: 99%

A Novel Proposed Algorithm to Enhance the Overcurrent Relays’ Performance in Active Distribution Networks

El-Tawab

Mohamed

Abdelaziz

2022

International Transactions on Electrical Energy Systems

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This research addresses two topics: the first is the optimal coordination of overcurrent relays (OCRs), which has recently become a major challenge to ensure reliability and speed of relays’ operation, and the second is a modified circuit added to the OCR to vanquish the barriers caused by the ever-increasing participation of distributed energy resources (DERs), at a lower cost. For robust and reliable OCRs coordination, various types of optimization techniques are frequently used to find optimal OCRs settings in distribution networks (DNs). In this study, the improved wild horse optimization (IWHO) algorithm is used as a novel metaheuristic method for solving optimization issues in coordination of OCRs in a distribution network, for the first time. This technique is used to determine the optimal time multiplier setting (TMS) and optimal pickup setting (PS) of OCRs in order to minimize the overall operating time. The results of the proposed algorithm are compared with those obtained from other recent metaheuristic techniques. The obtained TMS and PS settings of each relay show the effectiveness of the proposed IWHO technique in terms of accuracy and speed in a medium scale radial network configuration. To replace the costly mitigation methods employed in the DN comprising DER, a simple circuit was proposed to be added to the OCR. Using the angle’s sign of positive sequence current component (PSCC) of fault current solely, this proposed circuit can detect the fault direction and assist the OCR in making the correct decision in fault detection and clearing with high penetration of DERs. IEEE-33 bus electrical power system has been used to validate the newly proposed protective solutions.

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Optimal coordination of directional overcurrent relay based on combination of Firefly Algorithm and Linear Programming

Cited by 24 publications

References 45 publications

Optimal overcurrent relay coordination: Balancing costs, time performance and generator placement in fault current limiter optimization

Optimal overcurrent relay coordination: Balancing costs, time performance and generator placement in fault current limiter optimization

The Recent Development of Optimal DOCR Protection Strategies for Sustainable Power Systems via Computational Intelligence Techniques

A Novel Proposed Algorithm to Enhance the Overcurrent Relays’ Performance in Active Distribution Networks

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