| Title |
Maloperation Prevention for Intelligent Generator IED |
| DOI |
https://doi.org/10.5370/KIEE.2026.75.4.791 |
| Keywords |
DWT; EMT Platform; IED; Impedance Trajectory; Loss of Field; Maloperation; Out-of-Step; Power Swing |
| Abstract |
Regarding a next-generation multi-function integrated IED, since power swing, out-of-step, and loss of field in generators commonly use impedance trajectory based protection techniques, each transient phenomenon must be accurately identified to prevent maloperation. This paper, as part of the leading application of intelligent generator IED, we present an improved technique for preventing maloperation based on DWT. We first summarize the principles of power swing, out-of-step, and field loss protection elements of IED. Next, we design the generator system targeting Chilbo Hydroelectric P/P using PSCAD software, an EMT platform. We verify the validity of steady-state simulation. Finally, we analyze and identify the simulation of power swing, out-of-step, and field loss phenomena based on impedance trajectories and proposed technique based on DWT while varying various conditions. As a result of the simulation, the three phenomena were accurately identified, thus preventing maloperation. |