研究目的
To present a modularized control strategy for DFIG systems under unbalanced and harmonic grid voltage conditions, aiming to improve power quality and system reliability without the need for communication between RSC and GSC.
研究成果
The modularized control strategy effectively improves DFIG system operation under unbalanced and distorted grid voltage, with advantages including simplified control complexity and elimination of communication between RSC and GSC. However, it introduces challenges like electromagnetic torque pulsation and DC-link voltage fluctuations.
研究不足
1. Electromagnetic torque pulsation at 100 and 300 Hz can damage DFIG components.
2. DC-link voltage fluctuations require larger capacitors for safe operation.
3. Third harmonic current components may pollute the power grid under certain control targets.
1：Experimental Design and Method Selection:
The study employs a modularized control strategy for DFIG systems, focusing on RSC and GSC under unbalanced and harmonic grid voltage. Theoretical models and VPI regulators are used for control.
2：Sample Selection and Data Sources:
A laboratory prototype of a 1 kW DFIG system is used, with parameters listed in the paper.
3：List of Experimental Equipment and Materials:
Includes a Chroma 61704 for grid simulation, DSP TMS320F28335 for control implementation, and SEMIKRON SKHI61 for IGBT driving.
4：Experimental Procedures and Operational Workflow:
The control strategies are implemented on separate DSPs, with sampling and switching frequencies set to 10 kHz and 5 kHz, respectively.
5：Data Analysis Methods:
Experimental results are analyzed to validate the control strategy's effectiveness under various grid conditions.
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