| Title |
A Study on Loss of Excitation Algorithm for Generator Field Protection |
| Authors |
박유영(Park, Yu-Yeong) ; 박철원(Park, Chul-Won) |
| DOI |
https://doi.org/10.5370/KIEEP.2014.63.4.368 |
| Keywords |
Apparent impedance ; Abnormal operating state ; DFT filter ; Field protection ; IED ; Internal fault ; Large generator ; Loss of excitation ; PSCAD/EMTDC |
| Abstract |
The most widely used scheme for detecting loss of excitation on generator is used to sense apparent impedance from generator terminals. This paper presents loss of excitation algorithm using DFT filter based negative offset mho elements for generator field protection. It's algorithm includes two negative mho characteristics looking in the generator. The generator control system was modeled by PSCAD/EMTDC software, and then the proposed algorithm was tested by the collecting relaying signals from selected the generator model. From simulation results, the loss of excitation algorithm can be used to field protection for generator. |