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Findings from North China Electric Power University in Wind Farms Reported (Understanding Subsynchronous Oscillations In Dfig-based Wind Farms Without Series Compensation)

Energy Daily News

2019 SEP 17 (NewsRx) -- By a News Reporter-Staff News Editor at Energy Daily News -- New research on Energy - Wind Farms is the subject of a report. According to news reporting from Beijing, People’s Republic of China, by NewsRx journalists, research stated, “Subsynchronous oscillation (SSO) phenomena caused by interactions between controllers of Doubly-fed induction generators (DFIGs) and series capacitor compensators has been well recognized. However, SSO can also happen on a DFIG-based wind farm without series compensation as reported in a recent real event.”

Funders for this research include National Natural Science Foundation of China (NSFC), NSF, ERC Program of the NSF, ERC Program of the DOE, China Scholarship Council (CSC), Fundamental Research Funds for the Central Universities.

The news correspondents obtained a quote from the research from North China Electric Power University, “This paper firstly analyzes the recorded voltage waveform during this SSO event. Then an equivalent model of the system including the wind farm, static synchronous compensator (STATCOM) and the power grid was established. The paper derives the subsynchronous frequency response of the DFIG converter together with the STATCOM in detail and gives the criterion for SSO to occur, which is verified by both time domain simulation and spectrum analysis. The methodology adopted in this paper can be generalized to analyze the causes of a type of SSO that involves DFIGs and STATCOM but not series compensation.”

According to the news reporters, the research concluded: “The paper also provides practical suggestions on adjustments of control parameters with the DFIG and STATCOM to prevent this type of SSO.”

For more information on this research see: Understanding Subsynchronous Oscillations In Dfig-based Wind Farms Without Series Compensation. IEEE Access, 2019;7():107201-107210. IEEE Access can be contacted at: Ieee-Inst Electrical Electronics Engineers Inc, 445 Hoes Lane, Piscataway, NJ 08855-4141, USA.

Our news journalists report that additional information may be obtained by contacting Y.H. Xu, North China Electric Power University, School of Electrical and Electronics Engineering, Beijing 102206, People’s Republic of China. Additional authors for this research include S.M. Zhao, Y.P. Cao and K. Sun.

The direct object identifier (DOI) for that additional information is: This DOI is a link to an online electronic document that is either free or for purchase, and can be your direct source for a journal article and its citation.


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