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This paper presents a wind-driven DC power generation and control system modified by a doubly fed induction generator (DFIG), which stator is connected with a full-power diode rectifier to supply DC power to a stand-alone load and rotor is connected to the DC link with a PWM converter in charge of regulation of frequency and voltage on stator side. The transient character and behavior of current,...
Double-fed induction generators is introduced as the dominant generator in comparison with synchronous generators. With increased production capacity in wind farms their role in power system stability has become important. Inertia response is the first reaction of the generator to the frequency disturbance in power system. Synchronous generators have a high inertia response but DFIG has a very low...
Operation characteristics of doubly fed wind turbine generator system under grid voltage unbalance conditions are analyzed. In order to restrain various pulsations, a coordinated control strategy of rotor-side and grid-side converters of a doubly fed induction generator (DFIG) is presented. Taking the pulsations of electromagnetic torque, stator reactive power and system total output power at double...
The paper describes a method to control the rotor-side and grid side converters in a DFIG when subjected to the effects of network voltage unbalance conditions. Multi Frequency Resonant Controllers are incorporated into the grid side and rotor side converters to assist in the control functions. The Resonant Controllers are tuned to twice the network frequency to assist in the control of power and...
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