An on-line relay coordination algorithm for adaptive protection using linear programming technique

Chattopadhyay, Bhargab; Sachdev, Manoj; Sidhu, T.S.

doi:10.1109/61.484013

Cited by 307 publications

(125 citation statements)

References 6 publications

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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 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.…”

mentioning

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%

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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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Section: Protection Coordination Examplementioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Directional Overcurrent Relays Coordination Problems in Distributed Generation Systems

Ehrenberger

Švec

2017

Energies

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“…It was presented a review of the linear programming utilization as well as some extensions to the techniques like the integer and quadratic programming and analyzed the incorporation of financial aspects to the problem. In [4] it is possible to see an application of linear programming in the determination of coordinated relay settings through a two-phase simplex method. Another application of linear programming is presented in [5] and reference [6] was pointed out the utilization of linear programming as one of the techniques to solve the unit commitment problem.…”

Section: Introductionmentioning

confidence: 99%

Linear Programming for Optimum PID Controller Tuning

Oliveira¹,

Honório²,

Anzai³

et al. 2014

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This work presents a new methodology based on Linear Programming (LP) to tune ProportionalIntegral-Derivative (PID) control parameters. From a specification of a desired output time domain of the plant, a linear optimization system is proposed to adjust the PID controller leading the output signal to stable operation condition with minimum oscillations. The constraint set used in the optimization process is defined by using numerical integration approach. The generated optimization problem is convex and easily solved using an interior point algorithm. Results obtained using familiar plants from literature have shown that the proposed linear programming problem is very effective for tuning PID controllers.

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“…Different solutions have been studied to address this complex issue such as simplex method [2,3], graphical selection procedure [4], and application of several optimization algorithms which among them, particle swarm optimization (PSO) [5][6][7][8][9], bee colony algorithm (BCA) [10], genetic algorithm (GA) [11,12], differential evolution (DE) method [13], ant colony optimization (ACO) [14] and etc., have been presented. Although these methods have been investigated for relay coordination issue, in a medium and large scale power system the application of such methods are quite time consuming [15] and in some cases completely difficult and due to this reason meta-heuristic algorithms are not able to sufficiently and quickly process the coordination in practice.…”

Section: Introductionmentioning

confidence: 99%

An Innovative Fast Relay Coordination Method to Bypass the Time Consumption of Optimization Algorithms in Relay Protection Coordination

Kheshti¹,

Kang²,

Jiao³

2017

Journal of Electrical Engineering and Technology

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-Relay coordination in power system is a complex problem and so far, meta-heuristic algorithms and other methods as an alternative approach may not properly deal with large scale relay coordination due to their huge time consuming computation. In some cases the relay coordination could be unachievable. As the urgency for a proper approach is essential, in this paper an innovative and simple relay coordination method is introduced that is able to be applied on optimization algorithms for relay protection coordination. The objective function equation of operating time of relays are divided into two separate functions with less constraints. As the analytical results show here, this equivalent method has a remarkable speed with high accuracy to coordinate directional relays. Two distribution systems including directional overcurrent relays are studied in DigSILENT software and the collected data are examined in MATLAB. The relay settings of this method are compared with particle swarm optimization and genetic algorithm. The analytical results show the correctness of this mathematical and practical approach. This fast coordination method has a proper velocity of convergence with low iteration that can be used in large scale systems in practice and also to provide a feasible solution for protection coordination in smart grids as online or offline protection coordination.

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An on-line relay coordination algorithm for adaptive protection using linear programming technique

Cited by 307 publications

References 6 publications

Directional Overcurrent Relays Coordination Problems in Distributed Generation Systems

Directional Overcurrent Relays Coordination Problems in Distributed Generation Systems

Linear Programming for Optimum PID Controller Tuning

An Innovative Fast Relay Coordination Method to Bypass the Time Consumption of Optimization Algorithms in Relay Protection Coordination

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