6-Bus System (System III)

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 bus-1 and bus-6 through power transformers, 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.
\(\bullet\) It can be observed from the given primary/backup (P/B) relay pairs that the (\(R_7/R_{13}\)) pair is relaxed.
\(\bullet\) The CT ratios (\(CTRs\)) are not given, but they are supposed to be similar to those used in the first 8-bus test system and the second 6-bus test system.
\(\bullet\) Also, the elements specifications are different; as can be seen in Table 1.
\(\bullet\) The step of variations of \(PS\) and \(TMS\) are \(0.25 A\) and \(0.05\), respectively.
\(\bullet\) 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.

III. Files:

\(\bullet\) Tables Source Codes (LaTable 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.