A Multiobjective Optimization Technique to Develop Protection Systems of Distribution Networks With Distributed Generation

Pereira, Katiani; Pereira, Benvindo Rodrigues; Contreras, Javier; Mantovani, José Roberto Sanches

doi:10.1109/tpwrs.2018.2842648

Cited by 49 publications

(61 citation statements)

References 23 publications

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“…WTGs, as well as other distributed generation units, might affect operation of overcurrent relays (OCRs). Constant short-circuit impedance model of generation units is typically used [6]- [9], which may not be consistent. This paper is organized as follows.…”

Section: Introductionmentioning

confidence: 99%

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Impact of Short-Circuit Impedance Model for Variable-Speed Wind Turbine Generators on Operation of Overcurrent Relays

Somi¹,

Polajžer²,

Štumberger³

2024

RE&PQJ

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This paper discussed different short-circuit impedance models for type 3 and type 4 wind turbine generators. IEC and IEEE-PES models are either simplified or they require additional data. The proposed model is given by a non-linear dependency of the short-circuit impedance and voltage on the medium voltage side of the unit transformer. Furthermore, the proposed model, as well as the constant impedance-based model were used for timing coordination of overcurrent relays in a radial 6-bus network. The obtained results show that the constant impedance-based model overestimates short-circuit currents. Consequently, selectivity of individual overcurrent relays might be questionable.

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Section: Introductionmentioning

confidence: 99%

“…Furthermore, it should be pointed out, that the proposed model is given only for the comparison with the constant impedance-based model (dashed line inFig. 2), which is typically used for timing coordination of OCRs operation[6]-[9].…”

mentioning

confidence: 99%

Impact of Short-Circuit Impedance Model for Variable-Speed Wind Turbine Generators on Operation of Overcurrent Relays

Somi¹,

Polajžer²,

Štumberger³

2024

RE&PQJ

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“…The first strategies try to address the protection issues arising from the presence of DGs by changing DG planning and operation schemes. Optimal placement of DGs considering limitations of protection systems, 6 controlling DG outputs based on the fault current level of the system 7 and disconnecting the DGs in the fault condition are some examples for the first strategies 8 . On the other hand, the second strategies focus on improving the protection systems to cope with the protection problems related to DG integration in the micro‐grids.…”

Section: Introductionmentioning

confidence: 99%

A novel adaptive protection coordination scheme for radial distribution networks in the presence of distributed generation

Bisheh

Fani

Shahgholian

2021

Int Trans Electr Energ Syst

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Summary Developing micro‐grids and increasing penetration of distributed generation (DG) bring significant techno‐economic benefits to power systems. However, the presence of DG can affect the performance of the protection system. In particular, the coordination of over‐current protection relays in the presence of DGs is a challenging task. In this article, an adaptive algorithm is proposed for protection coordination of over‐current relays. Once the coordination of relays is disturbed due to the presence of DG, the characteristic curve of the backup relay is adaptively modified based on the characteristic curve of the main relay in such a way that the coordination time interval (CTI) be in the acceptable range and therefore the coordination of relays is maintained. The proposed algorithm can maintain the coordination of over‐current relays locally only by controlling current parameter of backup relay and without imposing any restriction on the output power of DGs. Therefore, the proposed protection coordination scheme allows system operators and DG owners to exploit DG benefits without concerning about protection aspects related to the presence of DGs. The efficiency and applicability of the proposed method are validated using simulations on a typical industrial 20 kV radial distribution system. The simulation results show that the proposed algorithm can maintain the CTI of the main and backup relays in an acceptable range for various penetration levels of DGs.

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“…—DIFaddThe first approach found optimal number and positions of reclosers in the system while the second (pareto based) approach considered islanded operation of DG. A mixed‐integer non‐linear programming (MINLP)‐based multi‐objective optimisation model for optimised, selective and coordinated allocation of control and protective devices and switches in DG‐enhanced distribution system has been presented in [10]. The model ensured system reliability improvement while reducing the protection cost.…”

Section: Introductionmentioning

confidence: 99%

Optimal placement of protective devices and switches in a radial distribution system with distributed generation

Alam

Pant

Das

2020

IET Generation, Transmission & Distribution

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Optimal placement of protective devices and switches in the distribution system improves the system reliability at the cost of increased investment. In this study, a new bi-directional analytical model has been developed to solve the problem of optimal placement of protective devices and switches in various zones of a distribution system with distributed generation (DG). The model determines the optimal number and locations of reclosers, switches, 'fuse-save fuses' and 'fuse-blow fuses' for increasing the system reliability while reducing the investment and outage costs, considering system data uncertainties. For considering uncertainties in load data, failure rates (temporary and permanent) and repair rates, the model utilises three-point estimate method. The formulated problem has been solved for 69-bus distribution system and radial distribution system connected to bus 4 of the reliability busbar test system, using genetic algorithm optimisation technique. After analysing the test results, it is concluded that considerable profit to the utility is achieved by optimal placement of protective devices and switches in various zones of the distribution system with DG units.

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A Multiobjective Optimization Technique to Develop Protection Systems of Distribution Networks With Distributed Generation

Cited by 49 publications

References 23 publications

Impact of Short-Circuit Impedance Model for Variable-Speed Wind Turbine Generators on Operation of Overcurrent Relays

Impact of Short-Circuit Impedance Model for Variable-Speed Wind Turbine Generators on Operation of Overcurrent Relays

A novel adaptive protection coordination scheme for radial distribution networks in the presence of distributed generation

Optimal placement of protective devices and switches in a radial distribution system with distributed generation

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