Abstract
The replacement of conventional generation by power electronics-based generation changes the dynamic characteristics of the power system. This results in, among other things, the increased susceptibility to subsynchronous oscillations (SSO). First, this paper discusses three recently emerging SSO phenomena, which arise due to the interactions between (1) a doubly-fed induction generator and a series compensated transmission system; (2) a voltage source converter (VSC) and a weak grid; and (3) nearby VSCs. A fundamental review of these phenomena resulted in the requirement for a reclassification of the existing SSO phenomena. This reclassification is proposed in this work and is based on interacting components identified using participation factor analysis for the distinct phenomena. Second, a critical review of the existing mitigation measures is performed for these phenomena, highlighting the advantages and disadvantages of the solutions. The influence of the wind speed, grid strength, number of wind turbines, and several converter controller parameters are also discussed. To assist equipment manufacturers, control design engineers, and system operators in selecting and designing effective mitigation measures, the existing solutions are categorized in control solutions, hardware solutions, and solutions based on system level coordination. Finally, perspectives on open issues conclude this paper.
Highlights
The power system is experiencing a proliferation of power electronics interfaced devices (PEID) as part of the energy transition
The GSC behaves like a capacitive reactance with negative damping and combined with weak grid conditions, i.e., a high equivalent line inductance L, this results in low resonance frequencies
Participation factor analysis showed that the states of the generator and MSC of the drive permanent magnet synchronous generator (D-PMSG) do not participate in this mode, whereas a large participation was observed for the states of the DC link (DC link voltage), the GSC
Summary
The power system is experiencing a proliferation of power electronics interfaced devices (PEID) as part of the energy transition. SSCI is currently used in literature to refer to three fundamentally distinct phenomena: (i) The interaction between a doubly-fed induction generator (DFIG) based wind farm and a series capacitor compensated transmission line [3]; (ii) the interaction between a voltage source converter (VSC) of, e.g., a direct-drive permanent magnet synchronous generator (D-PMSG) and a weak grid [4]; and (iii) the interaction among VSCs [5]. The main objective of this paper is to critically evaluate the available mitigation solutions, including their strengths and weaknesses, for all three new SSO phenomena.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
