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 44 publications

(53 citation statements)

References 23 publications

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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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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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“…—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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“…In order to meet the indexes required by the regulatory agencies, DISCOs install protection devices in their Distribution Systems (DSs), which, in addition to ensuring the preservation of equipment (e.g., transformers, capacitor banks, and reactors), directly influence the DS's reliability. One of the fundamental reliability indexes is the System Average Interruption Duration Index (SAIDI), which must be kept within pre-established limits that depend on the company's capital investment (Pereira et al, 2018). In this context, the installation of protection and maneuvering equipment is indispensable, since the performance of these devices determines the area affected This work was supported by Itaipu Binacional/UCI and Itaipu Technological Park Foundation -Brazil.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Validation of a Directional Overcurrent Relay as an Island Interconnection Device

Faria

Souza

Otto

et al. 2020

Anais Do Simpósio Brasileiro De Sistemas Elétricos 2020

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The growing number of decentralized generators in the distribution systems and the consequent increase in the penetration level in the networks have prompted the inclusion of this scenario in researches involving the planning of electrical power systems. The planning of protection systems for distribution networks considering distributed generators requires adaptations in the approach due to modifications in characteristics of the network, such as passivity and unidirectional power flow. Furthermore, the insertion of generators in distribution networks allows the implementation of new operation methods, such as the possibility of disconnecting some loads from the main feeder and supplying them through distributed generators. The island operation can improve the service continuity indexes, as well as reduce the costs of non-supplied energy. Although the island operation is widely proposed in the literature as a means to improve the system's reliability, the simulation of a protective device to intentionally island a region and the verification of its limitations is not. In this paper, we present the modeling of a directional overcurrent relay through ATP-EMTP, and its employment as a device for island interconnection, analyzing its zone of non-operation. CIGRE 14-bus test system is used to conduct short-circuit tests with the variation of resistance and type of fault applied. Theresults show the effectiveness of the device, which is able to identify all faults with real impact on the network, placing the region in island operation in less than 20 ms.

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

Cited by 44 publications

References 23 publications

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

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

Modeling and Validation of a Directional Overcurrent Relay as an Island Interconnection Device

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