Evaluation of Phase Imbalance Compensation for Mitigating DFIG-Series Capacitor Interaction

Vinay Sewdien, Jose Luis Rueda Torres and Mart van der Meijden
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Vinay Sewdien: System Operations, TenneT TSO B.V., 6800 AS Arnhem, The Netherlands
Jose Luis Rueda Torres: Electrical Sustainable Energy, Delft University of Technology, 2628 CD Delft, The Netherlands
Mart van der Meijden: System Operations, TenneT TSO B.V., 6800 AS Arnhem, The Netherlands

Energies, 2020, vol. 13, issue 17, 1-17

Abstract: The phase imbalance compensation concept is proposed in literature as an alternative way to mitigate classical subsynchronous resonance (SSR) problems in series-compensated transmission lines. However, a fundamental analysis to determine this concept’s ability to mitigate resonances between a doubly-fed induction generator (DFIG) and a series compensated transmission line, i.e., DFIG-SSR, is not reported in literature. Therefore, the objective of this paper is to investigate to which extent phase imbalance compensation is able to mitigate DFIG-SSR. For the phase imbalance compensation scheme, an analytical model that captures the relation between the level of series compensation, the degree of asymmetry between the compensated phases, and the resulting shift in resonance frequency is developed and validated using time domain simulations. Then, an optimisation framework is developed to search for an adequate level of compensation asymmetry, capable of mitigating the adverse interactions. The optimisation allows us to show that, even with the best set of parameters, phase imbalance compensation is not suitable for mitigating DFIG-SSR. The analytical model enables us to explain the underlying physical reasons for this and an attempt is made to explain why this concept is theoretically able to mitigate classical resonance issues. Lastly, directions for future research are identified.

Keywords: DFIG; FACTS; MIGRATE; series compensation; SSCI; SSR; stability and control (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
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