Open AccessImproved synchrophasor measurement to capture sub/super‐synchronous dynamics in power systems with renewable generation
Author(s) -
Xie Xiaorong,
Zhan Ying,
Liu Huakun,
Liu Chun
Publication year - 2019
Publication title -
iet renewable power generation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.005
H-Index - 76
ISSN - 1752-1424
DOI - 10.1049/iet-rpg.2018.5533
Subject(s) - phasor , phasor measurement unit , electric power system , context (archaeology) , computer science , system of measurement , units of measurement , compensation (psychology) , discrete fourier transform (general) , electronic engineering , power (physics) , control theory (sociology) , engineering , fourier transform , fourier analysis , control (management) , short time fourier transform , mathematics , artificial intelligence , psychoanalysis , mathematical analysis , biology , psychology , paleontology , quantum mechanics , physics , astronomy
The existing phasor‐measurement unit (PMU) and wide‐area measurement system (WAMS) based on thefundamental synchrophasors are insufficient to accurately capture the dynamicsof sub/super‐synchronous resonance or oscillation (SSR/SSO). To address thisissue, this study proposes a new method for the simultaneous and precisemeasurement of the fundamental and multiple sub/super‐synchronous harmonicphasors. It improves the classic discrete Fourier transform (DFT)‐based methodby adding adaptive frequency detection, modal filtration and phasor correctionand compensation. Thus, in the context of SSR/SSO, the phasors of bothfundamental and interharmonic components can be precisely obtained at local PMUsand the control/data centre of WAMS. The basic procedures and the prototypeimplementation of the method have been elaborated, and the performance has beenexamined with simulation signals as well as the field data recorded from anactual SSO incident. The results have verified its high precision, noiseimmunity and fast response.