Presolve analysis and interior point solutions of the linear programming coordination problem of directional overcurrent relays

Urdaneta, A.J.; Pérez, Luís G.; Gómez, Julio; Feijoo, B.; González, Marcos J.

doi:10.1016/s0142-0615(00)00097-1

Cited by 56 publications

(38 citation statements)

References 10 publications

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“…In [25,26], analytical based methods for identification of critical fault points for solving the relay coordination problem were discussed. An approach based on the "interior point primal-dual algorithm" was discussed in [27] where additional constraints were imposed by distance relays and breaker failure on relay coordination studies.…”

Section: Analytic Methodsmentioning

confidence: 99%

Protection coordination in distribution systems with and without distributed energy resources- a review

Singh

2017

Prot Control Mod Power Syst

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Emission of greenhouse gases and depletion of fossil fuel reserves are two key drivers, which are forcing the mankind to generate the future energy demand from the renewable energy resources. These resources are generally distributed in nature and are directly integrated at distribution levels. Increasing penetration of the distributed energy resources in distribution power networks creates additional operational and control issues. These are mostly regulatory, economical load dispatching, power quality and protection issues. Generally power distribution systems are protected with the help of dedicated over current based protection schemes. But increasing share of distributed energy resources penetration in electric utilities poses a serious threat to the existing protection coordination schemes of the distribution systems. Distributed energy resources connected distribution networks become interconnected in nature and protection coordination schemes, which are designed for unidirectional flow of fault currents become ineffective/non-functional. Therefore, new protection coordination schemes are required for providing the adequate protection coordination for distributed energy resources connected electric power networks. In the available literature, the protection coordination schemes for radial distribution systems and developments in the area of protection coordination are discussed in detail. A thorough review for all these protection coordination schemes for distribution systems with and without distributed energy resources is done in this review article. It includes the analytical and artificial intelligence based techniques application for coordination of protective relays in the distribution systems. The limitations and research gaps in the area of protection coordination schemes are also presented in this review article. The aim of this research paper is to bring all the available research in the area of relay coordination on one platform, so that it will help the emerging researcher to identify the future scope of relay coordination application for distributed energy resources connected distribution systems.

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Section: Analytic Methodsmentioning

confidence: 99%

Protection coordination in distribution systems with and without distributed energy resources- a review

Singh

2017

Prot Control Mod Power Syst

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“…All the maximum short-circuit contributions considered in n i and m i nodes for all fault paths are entered in Tables 7 and 8. In the objective function design in Section 5 and in many publications, too [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30], the selectivities met only in the primary and secondary nodes have been assumed. To verify the selectivity is met, not only in these nodes but in the entire protected section (between the primary and secondary nodes), different short-circuits placements have been explored in the protected section.…”

Section: Protection Coordination Examplementioning

confidence: 99%

“…In most of these works, an appropriately designed optimization is shown as a suitable tool for this purpose. For example, in [15][16][17][18][19][20][21][22][23], the values of time multipliers M Oi are determined for predetermined values of I pcOi and slopes (E Oi and K Oi ). For each protection, only one coefficient is looked for, and the linear programming can be used.…”

mentioning

confidence: 99%

“…In the latter, the optimization is nonlinear and a more sophisticated optimization method must be used. However, all the aforementioned works [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] have mainly focused on the optimization process itself, but not much attention has been paid to choosing the proper short-circuit contributions types; additionally, only the maximum and minimum short-circuit contributions have been taken into account (and/or the current contributions values, without a calculation process description, have only been mentioned). As will be described in the article, the maximum and minimum short-circuit contributions can only be used if the short-circuit contributions flowing through primary and selective protections are the same.…”

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Directional Overcurrent Relays Coordination Problems in Distributed Generation Systems

Ehrenberger

Švec

2017

Energies

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This paper proposes a new approach to the distributed generation system protection coordination based on directional overcurrent protections with inverse-time characteristics. The key question of protection coordination is the determination of correct values of all inverse-time characteristics coefficients. The coefficients must be correctly chosen considering the sufficiently short tripping times and the sufficiently long selectivity times. In the paper a new approach to protection coordination is designed, in which not only some, but all the required types of short-circuit contributions are taken into account. In radial systems, if the pickup currents are correctly chosen, protection coordination for maximum contributions is enough to ensure selectivity times for all the required short-circuit types. In distributed generation systems, due to different contributions flowing through the primary and selective protections, coordination for maximum contributions is not enough, but all the short-circuit types must be taken into account, and the protection coordination becomes a complex problem. A possible solution to the problem, based on an appropriately designed optimization, has been proposed in the paper. By repeating a simple optimization considering only one short-circuit type, the protection coordination considering all the required short-circuit types has been achieved. To show the importance of considering all the types of short-circuit contributions, setting optimizations with one (the highest) and all the types of short-circuit contributions have been performed. Finally, selectivity time values are explored throughout the entire protected section, and both the settings are compared.

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“…Então Urdaneta et al (2001) propõem uma técnica que utiliza algoritmo Primal-Dual Previsor-Corretor de pontos interiores, considerando unidades de backup com tempo definido (segunda zona de relés de distância e relés de falhas em disjuntores) na coordenação proposta. A metodologia foi empregada em um sistema real de 115-69 kV com 108 barras, 86 linhas, 61 transformadores e 97 RDS.…”

Section: Coordenação Por Técnicas Matemáticas Convencionaisunclassified

Algoritmo enxame de partículas discreto para coordenação de relés direcionais de sobrecorrente em sistemas elétricos de potência

Bernardes¹

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Presolve analysis and interior point solutions of the linear programming coordination problem of directional overcurrent relays

Cited by 56 publications

References 10 publications

Protection coordination in distribution systems with and without distributed energy resources- a review

Protection coordination in distribution systems with and without distributed energy resources- a review

Directional Overcurrent Relays Coordination Problems in Distributed Generation Systems

Algoritmo enxame de partículas discreto para coordenação de relés direcionais de sobrecorrente em sistemas elétricos de potência

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