PROJECT TITLE :
Flexible IQÐV Scheme of a DFIG for Rapid Voltage Regulation of a Wind Power Plant - 2017
This paper proposes a versatile reactive current-to-voltage (IQ - V ) theme of a doubly fed induction generator (DFIG) for the rapid voltage regulation of a wind power plant (WPP). In the proposed scheme, the WPP controller dispatches completely different voltage set points to the DFIGs relying on their rotor voltage margins. The DFIGs inject completely different reactive powers with the versatile IQ - V schemes implemented in the rotor-aspect and grid-facet converters. The IQ - V characteristic, which consists of the gain and width of a linear band and IQ capability, varies with time depending on the IQ capability of the converters and a voltage dip at the purpose of interconnection (POI). To increase the IQ capability throughout a fault, the active current is reduced in proportion to a voltage dip. If the IQ capability and/or the POI voltage dip are giant, the IQ - V gain is ready to be high, thereby providing speedy voltage regulation. To avoid an overvoltage once the fault clearance, a rapid IQ reduction scheme is implemented in the WPP and DFIG controllers. The performance of the proposed versatile theme was verified beneath scenarios with numerous disturbances. The proposed theme can help increase wind power penetration without jeopardizing voltage stability.
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