Coordination of directional over‐current relays in active distribution networks using generalised benders decomposition

Saberi, Hossein; Amraee, Turaj

doi:10.1049/iet-gtd.2017.0434

Cited by 21 publications

(15 citation statements)

References 25 publications

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“…In this paper, the unwanted tripping of DGs is considered in UFLS design to reach the proper load shedding strategy. The authors in [22] have assessed different methodologies for DG protection related issues.…”

Section: A Model Of Rocof Relaymentioning

confidence: 99%

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Probabilistic Under Frequency Load Shedding Considering RoCoF Relays of Distributed Generators

Amraee

Darebaghi

Soroudi

et al. 2018

IEEE Trans. Power Syst.

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The activation of Under Frequency Load Shedding (UFLS) is the last automated action against the severe frequency drops in order to re-balance the system. In this paper, the setting parameters of a multistage load shedding plan are obtained and optimized using a discretized model of dynamic system frequency response. The uncertainties of system parameters including inertia time constant, load damping and generation deficiency are taken into account. The proposed UFLS model is formulated as a mixed integer linear programming optimization problem to minimize the expected amount of load shedding. The activation of Rateof-Change-of-Frequency (RoCoF) relays as the anti-islanding protection of Distributed Generators (DGs) are considered. The MCS method is utilized for modeling the uncertainties of system parameters. The results of probabilistic UFLS are then utilized to design four different UFLS strategies. The proposed dynamic UFLS plans are simulated over the IEEE 39-bus and the large scale practical Iranian national grid. Index Terms-Under frequency load shedding, inertia time constant, load damping, RoCoF, uncertainty. s Time delay before load shedding. OF Variable for representing the objective function. H ρ Value of H at ρ th scenario.

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Section: A Model Of Rocof Relaymentioning

confidence: 99%

“…Therefore, the value of f sh max must be lower than 49.5Hz. Based on (22), to permit the system frequency recovery and to avoid the overlaps of set-points a specific gap should be included between two subsequent stages(e.g. 0.2Hz or 0.3Hz).…”

Section: Deterministic Ufls Schemementioning

confidence: 99%

Probabilistic Under Frequency Load Shedding Considering RoCoF Relays of Distributed Generators

Amraee

Darebaghi

Soroudi

et al. 2018

IEEE Trans. Power Syst.

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“…Two interior point‐based methods (IPMs) including IPM–IPM and IPM–branch and bound methods (IPM–BBM) are proposed in [8] to solve the DOCRs coordination problem. In [9], the problem is modelled as a mixed‐integer non‐LP (MINLP) and is solved using generalised benders decomposition by considering I set s as discrete variables. In [10], the DOCRs coordination problem is formulated as a quadratically constrained quadratic programming, which is solved using Scip solver.…”

Section: Introductionmentioning

confidence: 99%

Hybrid VNS–LP algorithm for online optimal coordination of directional overcurrent relays

Damchi

Dolatabadi

2020

IET Generation, Transmission & Distribution

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“…A new numerical iterative method is introduced in Mahari and Seyedi to solve DOC coordination problem with initial value independence and finding the global optimum capability. Also, a 2‐stage analytical algorithm based on GBD is proposed in Saberi and Amraee …”

Section: Introductionmentioning

confidence: 99%

A new objective function for adaptive distance and directional over-current relays coordination

Moravej

Ardebili

2018

Int Trans Electr Energ Syst

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Summary The complexity and importance of relay coordination problem are added by increasing interconnection and interpenetration of power networks. Online, adaptive, fast, and reliable re‐coordination of relays are more needed to provide requirements of both clients and the new smart and fast‐changing power network. In this paper, distance and directional over‐current relays coordination problem is solved adaptively by using modified bees algorithm and changing the conventional objective function by using flexible coordination time intervals and pickup currents. The modification on the optimization algorithm has shown up to 50% improvement in efficiency that can be used in other optimization problems. 8, 14, and 30 bus sample networks were simulated to evaluate proposed method. The result of the optimization problem has shown a very good improvement compared with the methods that have been used in prior researches.

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Coordination of directional over‐current relays in active distribution networks using generalised benders decomposition

Cited by 21 publications

References 25 publications

Probabilistic Under Frequency Load Shedding Considering RoCoF Relays of Distributed Generators

Probabilistic Under Frequency Load Shedding Considering RoCoF Relays of Distributed Generators

Hybrid VNS–LP algorithm for online optimal coordination of directional overcurrent relays

A new objective function for adaptive distance and directional over-current relays coordination

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