6-Bus System (System II)

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. The generating units are connected to all busbars except Bus 2 and 5, while the loads are not shown in the diagram.
\(\bullet\) This system has the same number of directional overcurrent relays (DOCRs) used in the first 8-bus test system. This is because the two additional buses are connected to the generating units and then feed the network through two transformers without using DOCRs on these two buses. It is supposed that the generators and transformers are protected by their own protection systems.
\(\bullet\) In some references, the relays operating time is modeled by using Sachdev formula with (\(TDS^{max}=11\)) "i.e., North American relays", while some other references model that dependent variable by using the standard formula (\(TMS^{max}=1.1\)) "i.e., European relays". Thus a precaution should be taken to have a fair performance comparison.
\(\bullet\) The CT ratios (\(CTRs\)), the \(3\phi\) short-circuit current for each P/B pair of relays, the side constraints of each variable, and the coordination time interval (\(CTI\)) 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. 2015 and all the necessary data were coded in MATLAB m-files.

III. Files:

\(\bullet\) High Resolution Images (JPEG and TIFF Formats) [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.