理想电网条件下双馈风力发电系统低电压穿越技术的控制策略研究 |
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引用本文:刘颉, 易灵芝, 刘智磊, 朱广辉, 罗百敏, 周哲.理想电网条件下双馈风力发电系统低电压穿越技术的控制策略研究[J].计算技术与自动化,2014,(2):19-22 |
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中文摘要:随着风电在电网所占比例的不断增大,提高风机在故障条件下的不间断运行能力越来越重要。通过分析交流励磁变速恒频双馈风机的运行特点,建立双馈风力发电系统的并网数学模型;针对电网电压小幅对称跌落,在不增加硬件成本的基础上,改进传统双馈发电机矢量控制策略,加入前馈补偿项来抑制电压小幅跌落时转子中的过电流,提高双馈风力发电系统的低压穿越能力。在MATLAB/SIMULINK中验证控制策略的合理性,为以后深入研究双馈风力发电系统提供了基础。 |
中文关键词:双馈风机 变速恒频 前馈补偿 低电压穿越 |
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Control Strategy of the Doubly-fed Wind Power Generator System of Low Voltage Ride Through Technology Ideal Grid Conditions |
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Abstract:As the penetration of wind power in electric power systems continues to grow, it has became very important to improve the fault ride-through capability of grid-connected wind generator. Through the analysis variable speed constant frequency doubly fed induction generator running characteristics, the precise mathematical model of DFIG has been built;In order to protect the system, an improved vector control strategy of the DFIG without using any other hardware circuit is proposed, it will reduce the rotor over-current during non-serious voltage dips, where the feed-forward compensation term has been considered. The model of doubly fed inductor wind generator has been built based on MATLAB/SIMULINK. A DFIG applying in wind power generator is under study for low voltage ride-through(LVRT). |
keywords:DFIG variable speed constant frequency Feed-forward compensation low voltage ride-through |
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