谐波电网电压下基于矢量谐振控制的双馈异步发电机集成控制策略

发布时间：2018-03-19 14:12

本文选题：谐波电网电压　切入点：双馈异步发电机　出处：《电工技术学报》2014年07期 　论文类型：期刊论文

【摘要】：通过建立5次、7次谐波电网电压下双馈异步风力发电机(DFIG)的数学模型,分析了DFIG风电机组运行于谐波电网下所产生的性能恶化。为改进DFIG在谐波电网下的运行性能,以DFIG定子电流正弦或定子输出有功/无功功率平稳为谐波控制目标,在转子电流PI闭环调节的基础上,加入定子电流矢量谐振控制或定子功率矢量谐振控制,以达到上述DFIG在谐波电网下的控制目标。为了有效实现控制目标,深入分析和对比了普通谐振控制器和矢量谐振控制器在DFIG运行于谐波电网下的300Hz交流信号调节性能。矢量谐振控制器由于其更为精确的300Hz交流信号调节能力以及充裕的相位裕度以确保闭环工作稳定性,因而更有助于DFIG在谐波电网下控制目标的实现。通过构建的风电机组,实验结果验证了本文所提出的谐波电网电压下的集成控制策略的正确性及有效性。
[Abstract]:By establishing the mathematical model of doubly-fed asynchronous wind turbine (DFIGG) under the 5th and 7th harmonic grid voltage, the performance deterioration of DFIG wind turbine running in harmonic network is analyzed. In order to improve the operation performance of DFIG in harmonic power network, Taking the DFIG stator current sinusoidal or stator output active / reactive power stationary as the harmonic control objective, the stator current vector resonance control or stator power vector resonance control is added on the basis of the rotor current Pi closed-loop regulation. In order to achieve the control goal of DFIG in harmonic power network, in order to realize the control goal effectively, This paper analyzes and compares the performance of 300Hz AC signal regulation between ordinary resonant controller and vector resonant controller running in harmonic power network with DFIG. The vector resonance controller is more accurate because of its ability to regulate 300Hz AC signal. Sufficient phase margin to ensure the stability of the closed-loop operation, The experimental results show that the integrated control strategy proposed in this paper is correct and effective under harmonic network voltage.
【作者单位】：浙江大学电气工程学院;
【基金】：国家自然科学基金重点资助项目(51277159) 国家863高技术基金资助项目(2011AA050204)
【分类号】：TM711

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