Setting Calculation of the Directional Relays Considering Dynamic Changes in the Network Topology

Yang, Xiongping; Shi, Dongyuan; Duan, Xianzhong

doi:10.1109/icpst.2006.321572

Cited by 2 publications

(2 citation statements)

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“…Up to now, changes in network topology have been modeled in the DOCRs coordination problem [1][2][3][4][5][6][7][8]. Transmission line outage has been considered in the DOCRs coordination problem in [1][2][3][4], where the problem has been solved using direct methods and decomposition techniques [1], hybrid…”

Section: Introductionmentioning

confidence: 99%

“…A method has been proposed in [5] to update the optimal settings of some DOCRs when transmission lines are added to the network. Effect of dynamic changes in network topology has been considered in [6,7]. In [8], robust settings for DOCRs in a microgrid have been determined using hybrid PSO, when the microgrid operates in both gridconnected and islanded modes.The coordination problem for two types of relays, namely, distance and overcurrent relays, has been investigated in several research works such as [9][10][11][12][13][14].…”

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confidence: 99%

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Preprocessing of distance and directional overcurrent relays coordination problem considering changes in network topology

Damchi

Sadeh

Mashhadi

2015

Int. Trans. Electr. Energ. Syst.

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SUMMARYThe number of constraints in coordination of distance and directional overcurrent relays (D&DOCRs) in power systems increases significantly by considering changes in network topology, especially in large power systems. By increasing the number of coordination constraints, the complexity of the D&DOCRs coordination problem is increased. Therefore, in this paper, a new method is proposed to reduce the number of coordination constraints in the D&DOCRs coordination problem. In the proposed method, redundant constraints are identified before solving the coordination problem. The proposed method is independent from D&DOCRs settings and operating characteristics of directional overcurrent relays. In order to evaluate the proposed method, two different test systems, namely, an 8-bus and the IEEE 14-bus test systems, are used. Based on the presented results, it can be seen that the proposed method is efficient, and by utilizing it, many redundant coordination constraints are identified and removed, helping to obtain effective solutions for the optimal settings with less computational effort.

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