Multiple machine representation of DFIG based grid-connected wind farms for SSR studies

Abstract

This work studies the Sub-Synchronous Resonance (SSR) interactions that can take place when a DFIG-based wind farm is connected to the electrical grid through a series-compensated transmission line. As opposed to recent literature on the subject, a multiple machine model is employed to represent the wind farm. This representation allows taking into account machine speed variability due to wind parks being spread over large extensions of land. Additionally, a three-mass model is used to describe the dynamics of the turbine-generator set (instead of the recurrently employed two-mass model). The obtained simulation results show that simplified modeling of DFIG-based wind farms can have a fairly significant impact on SSR related studies.

Subsynchronous resonance characteristics in presence of doubly‐fed induction generator and series compensation and mitigation of subsynchronous resonance by proper control of series capacitor

“…The IGE, caused by a self-excitation of the induction generators, has been well addressed, such as in [1,2]. SSR with a doubly-fed induction generator (DFIG) is a relatively new phenomenon that is demanding increased attention [3][4][5]. It is also referred to as the SSC interaction.…”

Research on the sub-synchronous oscillation in wind power connected to series compensated power system and its influencing factors

“…The literature [19] uses the modal analytical approach to obtain the participation factor of the wind power connected to series-compensation power system when the system causes SSO. The effect of wind speed on the sub-synchronous oscillation of the wind power connected to series-compensation power system was analyzed by simulation [20], but it did not carry out theoretical analysis.…”