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In this paper, a new control strategy is proposed to improve the performance of a wind generator system composed of a three-phase PMSG and a Back-to-Back three-phase to single phase converter. With the use of the large inductance of the synchronous generator, the control method minimizes the generator torque ripple when the system supplies a single-phase load. The problem arises from the fact that...
In accordance with the randomness and intermittent characteristics of wind power, the static synchronous compensator (STATCOM) is more competent and competitive for reactive power compensation in large scale wind farm. An average state model for the VSC-STATCOM is derived, according to the wind farm reactive power compensation characteristics, a novel decoupling control strategy of active power and...
The traditional control strategies of the permanent magnet synchronous generator (PMSG) based on rotor flux orientation have unconquerable drawbacks, such as the reactive power exchange by the id=0 control and the complicated calculation by the unity power factor (UPF) control. A novel UPF control strategy of the PMSG using stator flux orientation is proposed in this paper. The simulation results...
The fast development of wind power generation brings new necessary requirement for wind turbine to provide Low Voltage Ride-Through (LVRT) capability. The paper introduces the models of Doubly Fed Induction Generator (DFIG), converter and rotor active crowbar, and analyses characteristics of DFIG system with rotor active crowbar during grid voltage dip. A novel turn-on and turn-off control method...
The EMTDC model of ±500kV Gao-Zhao HVDC with DC power forth-and-reverse transmission deicing function is firstly introduced, including model parameters, user-defined SIMADYN D module development and HVDC control strategies, then bipole DC power forth-and-reverse transmission theory, deicing function realization and deicing function operation procedure are presented successively, and finally some deep...
The sensitivity of the DFIG to the grid disturbances such as a voltage dip restricts network stability and risks damage to generator converters during the fault period due to the over-current and/or over-voltage. It is now a requirement that wind turbine manufacturers demonstrate what is commonly called `Fault Ride Though' (FRT) capability in their turbine systems. The rotor crowbar, as a cost-effective...
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