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- Title
Improved synchrophasor measurement to capture sub/super‐synchronous dynamics in power systems with renewable generation.
- Authors
Xie, Xiaorong; Zhan, Ying; Liu, Huakun; Liu, Chun
- Abstract
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.
- Publication
IET Renewable Power Generation (Wiley-Blackwell), 2019, Vol 13, Issue 1, p49
- ISSN
1752-1416
- Publication type
Article
- DOI
10.1049/iet-rpg.2018.5533