Open AccessAnalytical technique for synchronous generator loss‐of‐excitation protection
Author(s) -
Noroozi Naser,
Yaghobi Hamid,
AlinejadBeromi Yoosef
Publication year - 2017
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/iet-gtd.2016.1494
Subject(s) - synchronism , shunt generator , armature (electrical engineering) , permanent magnet synchronous generator , excitation , generator (circuit theory) , control theory (sociology) , computer science , electrical engineering , voltage , engineering , electromagnetic coil , physics , telecommunications , control (management) , artificial intelligence , power (physics) , asynchronous communication , quantum mechanics
This study introduces a new analytical approach for the detection of loss of excitation (LOE) in a synchronous generator that uses only one local variable. The proposed method applies the mathematical analysis based on the generator armature current variation. In this method, after the generator loses its excitation, the second order derivative of generator armature current becomes and remains positive until a loss of synchronism event occurs. Simulations are performed for different levels of generator conditions and loads, and the results confirm the mathematical analysis. To demonstrate the suitability of the proposed method, comparisons are made with other protection methods. Studies show that the proposed strategy offers a better security and faster detection of LOE compared with the previous methods.