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A novel rotor-side protection circuit is introduced in view of the problem of low voltage ride through in double-fed variable speed constant frequency wind power generation system. The motor's mathematical model of steady and transient states have been established, and meanwhile the dynamic response of the double-fed induction generator during the grid voltage drop and after the voltage recovery has...
In this paper, an online fault diagnosis technique suitable for wind-based variable speed PM generators is proposed. This floating-space-vector technique is developed based upon space-vector concepts, and its mathematical formulation is elaborated in this paper. The technique is verified numerically as well as experimentally using a 7.2kW PM machine as a wind generator. The numerical model is based...
Doubly fed induction generators in conjunction with frequency converters allow the economic construction of large wind power plants with variable speed drives and a rated power output of up to several MW. Compared to fixed speed generators, the advantages of this configuration are high energy yields despite changing wind speeds, reduced negative effects on the grid and the possibility of reactive-power...
Calculation of short circuit current is an important task for wind farm and power system. In this paper transient of DFIG is analyzed under short circuit condition, and the theorem of constant flux linkage is applied to determine short circuit currents in the synchronously rotating reference frame dqo. Then, transient response of different order models considering or ignoring this theorem is obtained...
This paper will discuss the advantages of using switched reluctance generator (SRG) for wind energy applications. Specifically, the theoretical and experimental study of the self excitation of a SRG and the determination of the variable parameters in a SRG design are discussed. The switching requirements for the converter and the design parameters for the maximum power output of the SRG are computed...
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