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In this paper sub-synchronous control interactions (SSCI) in doubly-fed induction generator (DFIG) based wind farms are studied. The SSCI problem has come into prominence since the Electric Reliability Council of Texas (ERCOT) event of 2009, where a faulted line and subsequent outage in the network caused a large DFIG wind farm to become radially connected to the series compensation network, resulting...
This paper deals with subsynchronous resonance (SSR) phenomena in a capacitive series-compensated DFIG-based wind farm. Using both modal analysis and time-domain simulation, it is shown that the DFIG wind farm is potentially unstable due to the SSR mode. In order to damp the SSR, the rotor-side converter (RSC) and grid-side converter (GSC) controllers of the DFIG are utilized. The objective is to...
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