Open AccessEvaluating generator damping for wind‐integrated power system in ambient conditions
Author(s) -
Sun Zhenglong,
Liu Chunli,
Jiang Quanfeng,
Levron Yoash,
Cai Guowei
Publication year - 2021
Publication title -
iet renewable power generation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.005
H-Index - 76
eISSN - 1752-1424
pISSN - 1752-1416
DOI - 10.1049/rpg2.12321
Subject(s) - phasor measurement unit , electric power system , control theory (sociology) , wind power , computer science , generator (circuit theory) , frequency domain , electronic engineering , engineering , power (physics) , phasor , electrical engineering , physics , computer vision , control (management) , quantum mechanics , artificial intelligence
This paper proposes a power system multimode generator energy loss factor (GELF) based on energy flow method under environmental excitation. This index can evaluate generator damping changes in different oscillation modes in power systems, timely discover the damping deterioration of the generator, and track the source of low‐frequency oscillation. A signal expression method for electrical frequency domain under environmental excitation is derived. This method is combined with dissipated energy flow method to obtain a new type of GELF. In terms of signal processing, dynamic mode decomposition and Morlet wavelet filter extraction system mode components are used to improve computing accuracy. The proposed index enables online calculation with the support of phasor measurement unit and wide area measurement system. Simulation analysis is conducted in a standard 39 node system and wind‐integrated power system. Test results show the effectiveness and generality of the proposed index and method.