Journal
IEEE TRANSACTIONS ON POWER SYSTEMS
Volume 32, Issue 5, Pages 4002-4011Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPWRS.2016.2636374
Keywords
Ancillary services; doubly-fed induction generator; fast-frequency response; primary frequency control; wind power integration
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Funding
- SENESCYT, Government of the Republic of Ecuador [2015-AR6C5141]
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This paper presents a methodology for the analysis of frequency dynamics in large-scale power systems with high level of wind energy penetration by means of a simplified model for DFIG-based wind turbines. In addition, a virtual inertia controller version of the optimized power point tracking (OPPT) method is implemented for this kind of wind turbines, where the maximum power point tracking curve is shifted to drive variations in the active power injection as a function of both the grid frequency deviation and its time derivative. The proposed methodology integrates the model in a primary frequency control scheme to analyze the interaction with the rest of the plants in the power system. It is also proven that, under real wind conditions, the proposed version of the OPPT method allows us to smooth the wind power injected into the grid, thereby reducing frequency fluctuations.
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