Online monitoring of generator damping using dissipation energy flow computed from ambient data. Issue 18 (15th March 2017)

• Record Type: Journal Article
• Authors: Chen, Lei; Sun, Ming; Min, Yong; Xu, Xialing; Xi, Jianghui; Li, Yong
• Is Part Of: IET generation, transmission & distribution. Volume 11:Issue 18(2017)
• Page Start: 4430
• Page End: 4435
• Publication Date: 2017-03-15
• Subjects: phasor measurement -- power system transient stability -- electric power generation; generator damping online monitoring system -- dissipation energy flow -- generator control systems -- damping ratio reduction -- power system oscillation modes -- generator damping estimation -- ambient phasor measurement data -- DEF -- generator terminal -- transient energy dissipation -- small‐signal stability -- system mode estimation methods -- parameter identification; Electric power production -- Periodicals; Electric power transmission -- Periodicals; Electric power distribution -- Periodicals; 621.3105
• DOI: 10.1049/iet-gtd.2016.1523
• Languages: English
• ISSNs: 1751-8687

Abstract

Abstract : Online monitoring of generator damping assists in identifying wrong parameters or detrimental changes in generator control systems that may reduce damping ratios of power system oscillation modes. An approach for generator damping estimation using ambient data during normal operation of power systems is proposed. The ambient phasor measurement data at generator terminal is collected and filtered, and then the dissipation energy flow (DEF) into the generator is computed. The rate of change of the DEF represents the rate of transient energy dissipation of the generator and is used to estimate the generator damping. Test results show the validity and possible applications of the approach. A more comprehensive online monitoring system of small‐signal stability can be constructed using the approach together with system mode estimation methods.