8-Bus System (System I)

I. Introduction:

\(\bullet\) The network of this test system is shown in the figure given below where the near-end \(3\phi\) fault is considered. Bus 4 is connected to an external grid modeled by 400 MVA short-circuit capacity.
\(\bullet\) Some studies named this system as a 6-bus test system because bus 7 and bus 8 are connected to the generating units and do not have any directional overcurrent relay that has to be optimally coordinated with others mounted in the network.
\(\bullet\) The available set of the discretized plug-setting (\(PS\)) is \(\{0.5,0.6,0.8,1.0,1.5,2,2.5\}\). Although this test system has a small dimension, it has been observed that it is very hard to get a feasible optimal solution; please refer to our study given in the references section.
\(\bullet\) The generator data, the transformer data, the line data, the load data, the CT ratios (\(CTRs\)), the \(3\phi\) short-circuit current for each P/B pair of relays, and the limits of optimization variables all are given below (click on them for bigger size):

II. Single-Line Diagram:

\(\bullet\) This single-line diagram was drawn by Ali R. Al-Roomi in Sept. 2013 and all the necessary data were coded in MATLAB m-files.

III. Files:

\(\bullet\) System DATA (MATLAB, m-file Format) [Download]
\(\bullet\) Results Tester (MATLAB, m-file Format) [Download]

IV. Citation Policy:

If you publish material based on databases obtained from this repository, then, in your acknowledgments, please note the assistance you received by using this repository. This will help others to obtain the same data sets and replicate your experiments. We suggest the following pseudo-APA reference format for referring to this repository:

Ali R. Al-Roomi (2015). Optimal Relay Coordination Test Systems Repository [https://www.al-roomi.org/coordination]. Halifax, Nova Scotia, Canada: Dalhousie University, Electrical and Computer Engineering.

Here is a BiBTeX citation as well:

@MISC{Al-Roomi2015,
author = {Ali R. Al-Roomi},
title = {{Optimal Relay Coordination Test Systems Repository}},
year = {2015},
address = {Halifax, Nova Scotia, Canada},
institution = {Dalhousie University, Electrical and Computer Engineering},
url = {https://www.al-roomi.org/coordination}
}

V. References:

[1] Ali R. Al-Roomi. Optimal Coordination of Power Protective Devices with Illustrative Examples. Hoboken, New Jersey: Wiley-IEEE Press, 2022.
[2] F. A. Albasri, A. R. Alroomi, and J. H. Talaq, "Optimal Coordination of Directional Overcurrent Relays Using Biogeography-Based Optimization Algorithms," IEEE Transactions on Power Delivery, vol. 30, no. 4, pp. 903–911, 2015.