Enhancement of Small Signal Stability of Wind Farms by Using STATCOM and HVDC Link
Omar AL-Masari1, Musa AL-Masari2

1Omar Almasari, School of Information Technology and Electrical Engineering, University of Queensland, Brisbane, Australia.
2Musa Almasari, Electrical Engineering, University of Windsor, Windsor, Ontario.
Manuscript received on March 12, 2015. | Revised Manuscript received on March 13, 2015. | Manuscript published on March 25, 2015. | PP:4-10 | Volume-3 Issue-5, March 2015. | Retrieval Number: D0910023415

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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: Small signal instability problems in wind farms often lead to power system blackouts. This paper reports a comprehensive study of small signal stability in three different types of wind generator when coupling to a power system: doubly-fed induction generators (DFIG), squirrel cage induction generators (SCIG) and permanent magnet synchronous generators (PMSG). Time-domain analysis and Eigenvalue analysis were used to identify small signal instability problems in wind farm power systems. A static synchronous compensator (STATCOM) and power system stabilizer (PSS) was modelled and applied to the power system to enhance small signal stability. In addition, the performance of high voltage direct current (HVDC) and high-voltage alternating current (HVAC) links was examined in connecting the wind farm to the grid. The results show improvement in small signal stability by using HVDC rather than HVAC. The IEEE 14 Bus test system and all simulation models were implemented using the DIgSILENT PowerFactory software tool.
Keywords: Wind Turbine Generators, Small Signal Stability, Oscillatory Stability, Eigenvalue analysis, SCIG, PMSG, DFIG, STATCOM, PSS, HVDC, HVAC, IEEE 14 Bus test system, DIgSILENT PowerFactory.