Integration Point of Doubly-Fed Induction Generator  Wind Farm Based on Active Power Loss and Wind Speed Sensitivity

doi:10.3969/j.issn.1000－7229.2015.04.002

Abstract

Abstract:

Research on the impact of wind power integration on transmission loss is beneficial to the safe and economic operation of wind power system. However, the existing sensitivity index of transmission loss cannot directly reflect the influence of wind speed fluctuation. Under the maximum power point tracking （MPPT） strategy, active power output of doubly-fed induction generator （DFIG） is dependent on the stator voltage, and unknown before power flow solution due to its power loss. Based on power flow model of DFIGs, transmission loss sensitivity model was extended to propose new model for the sensitivity of active power loss to wind speed, which could reflect the influence of wind speed on active power loss and its tendency. The influence of var control modes for DFIGs on transmission loss and wind speed sensitivity was quantified. With considering wind speed probability interval distribution, the auxiliary criterions of sensitivity results on the location of wind farm and the var control modes of DFIGs were compositely analyzed. The results validate the feasibility and accuracy of the proposed sensitivity model.

Key words: active power loss, sensitivity, wind speed, doubly-fed induction generator （DFIG）, var control, integration point

CLC Number:

TM 614

LI Shenghu, ZHANG Wei, WANG Xiulong. Integration Point of Doubly-Fed Induction Generator Wind Farm Based on Active Power Loss and Wind Speed Sensitivity[J]. ELECTRIC POWER CONSTRUCTION, 2015, 36(4): 8-15.

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Integration Point of Doubly-Fed Induction Generator Wind Farm Based on Active Power Loss and Wind Speed Sensitivity

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