Survey on forced oscillations in power system

• Published in: Journal of modern power systems and clean energy Vol. 5; no. 5; pp. 671 - 682
• Main Author: GHORBANIPARVAR, Mohammadreza
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01-09-2017; The Institute of Electrical and Electronics Engineers, Inc. (IEEE); IEEE
• Subjects: Electric utilities; Electrical Machines and Networks; Electromechanical oscillations; Energy; Energy Systems; Forced oscillation; Free vibration; Phasor measurement unit; Power Electronics; Renewable and Green Energy; Self-coherence; System reliability; Electromechanical oscillations; Forced oscillation; Phasor measurement unit; Self-coherence
• ISSN: 2196-5625; 2196-5420
• DOI: 10.1007/s40565-017-0273-4

The oscillations in a power system can be categorized into free oscillations and forced oscillations. Many algorithms have been developed to estimate the modes of free oscillations in a power system. Recently, forced oscillations have caught many researchers’ attentions. Techniques are proposed to detect forced oscillations and locate their sources. In addition, forced oscillations may have a negative impact on the estimation of mode and mode-shape if they are not properly accounted for. To improve the power system reliability and dynamic properties, it is important to first distinguish forced oscillations from free oscillations and then locate the sources of forced oscillations in a timely manner. The negative impact of forced oscillation can be mitigated when they are detected and located. This paper provides an overview of the analysis technique of forced oscillations in power systems. In addition, some future opportunities are discussed in forced oscillation studies.