Multi‐criterion integrated method for low‐frequency oscillation‐type identification. Issue 17 (16th October 2018)

• Record Type: Journal Article
• Authors: Sun, Ming; Chen, Lei; Xu, Xialing; Min, Yong; Xu, Youping; Li, Kai
• Is Part Of: Journal of engineering. Volume 2018:Issue 17(2018)
• Page Start: 1935
• Page End: 1939
• Publication Date: 2018-10-16
• Subjects: power system stability -- power grids -- power system security; multicriterion integrated method -- low‐frequency oscillation‐type identification -- control decision system -- natural oscillation -- forced oscillation -- oscillation waveform -- power system security -- single‐criterion method -- defense system -- harmonic content -- characteristic index -- startup‐stage intrinsic damping ratio -- noise response damping ratio -- real‐power grid simulation; Engineering -- Periodicals; Engineering; Electronic journals; Periodicals; 620.005
• DOI: 10.1049/joe.2018.8353
• Languages: English
• ISSNs: 2051-3305

Abstract

Abstract : Low‐frequency oscillation is one of the major threats to power system security. Online analysis and control decision system for low‐frequency oscillation is in urgent need. Natural oscillation and forced oscillation are two types of low‐frequency oscillation. Different oscillation types need different treatment measures. Thus oscillation‐type identification is an important part of the defense system. A new multi‐criteria integrated method for identifying low‐frequency oscillation type is proposed. It has multiple criteria and overcomes the shortcomings of the previous single‐criterion method which has low accuracy. It chooses harmonic content, characteristic index of starting oscillation waveform, and the startup‐stage intrinsic damping ratio together with noise response damping ratio as criteria. The flowchart of the method is provided. The effectiveness of the multi‐criteria integrated method is verified by real‐power grid simulation cases. The results show that the method can reliably distinguish the low‐frequency oscillation type and is practical in the real‐power system.