UPQC并联变流器频域无源控制策略研究

发布时间：2018-04-02 06:13

本文选题：统一电能质量控制器　切入点：傅里叶变换　出处：《北京交通大学学报》2017年05期

【摘要】：为了提高统一电能质量控制器(UPQC)中并联变流器的频域补偿性能,本文提出在频域中设计一种多频无源控制策略.采用傅里叶变换技术对其交流数学模型进行频谱分解及多频直流建模,在被指定频率的直流模型上实施所提的控制器设计,理论分析表明该控制策略能够实现对并联变流器的指定频率控制,而且除了适用于三相系统外也适用于单相系统,可实现分相控制.该策略改善了传统在基频模型上设计的无源控制策略在跟踪多频指令信号时控制性能下降的现象.实验结果表明所提的控制策略可将谐波补偿率提高到95%.
[Abstract]:In order to improve the frequency-domain compensation performance of parallel converter in unified power quality controller (UPQC), In this paper, a multi-frequency passive control strategy in frequency domain is proposed. The frequency spectrum decomposition and multi-frequency DC modeling of the mathematical model are carried out by Fourier transform technique. The controller design is implemented on the DC model with specified frequency. The theoretical analysis shows that the proposed control strategy can realize the specified frequency control of the parallel converter, and it is also applicable to the single-phase system in addition to the three-phase system. Phase separation control can be realized. The control performance of the traditional passive control strategy designed on the basic frequency model is improved when tracking the multi-frequency command signal. The experimental results show that the proposed control strategy can increase the harmonic compensation rate to 95%.
【作者单位】：北京交通大学电气工程学院;北京信息科技大学自动化学院;清华大学电力系统及发电设备控制和仿真国家重点实验室;上海海事大学电力传动与控制研究所;
【基金】：国家自然科学基金项目(51477011) 北京市自然科学基金重点项目(KZ201511232035)~~
【分类号】：TM46;TM761

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