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Variable Speed Wind Turbines for Power System Stability Enhancement

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2 Author(s)
Ullah, N.R. ; Dept. of Energy & Environ., Chalmers Univ. of Technol., Gothenburg ; Thiringer, T.

This paper investigates possible improvements in grid voltage stability and transient stability with wind energy converter units using modified P/Q control. The voltage source converter (VSC) in modern variable speed wind turbines is utilized to achieve this enhancement. The findings show that using only available hardware for variable-speed turbines improvements could be obtained in all cases. Moreover, it was found that power system stability improvement is often larger when the control is modified for a given variable speed wind turbine rather than when standard variable speed turbines are used instead of fixed speed turbines. To demonstrate that the suggested modifications can be incorporated in real installations, a real situation is presented where short-term voltage stability is improved as an additional feature of an existing VSC high voltage direct current (HVDC) installation

Published in:

Energy Conversion, IEEE Transactions on  (Volume:22 ,  Issue: 1 )