Issues in OneLiner relay simulation
- ASPEN Support
- Oct 25, 2018
- 1 min read
We discovered a couple of issues in OneLiner simulation of relay operation in faults:
The calculation of V0,I0- and V2,I2- polarized OC relay directional elements was not done correctly. In faults where the relay voltage and/or current are zero or very low the program did not always show correct operation of the directional element. This software bug affected OneLiner version 14.
Simulation of SEL distance relay load encroachment logic did not fully match SEL hardware logic. In some fault conditions the program reported relay restrain in fault due to load encroachment logic incorrectly. This software bug affected OneLiner all versions.
These software bugs had been fixed in OneLiner version 14.6 with build number 51959 and higher (Program version and build number are displayed in OneLiner Help | About dialog box).
Users should contact ASPEN support to request program update with the bug fixes.
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