混合有源电力滤波器广义谐波检测方法研究

发布时间：2018-01-05 00:13

本文关键词：混合有源电力滤波器广义谐波检测方法研究　出处：《湖南工业大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着电网谐波、无功以及零负序等电能质量污染问题的日益严重，，将它们整合为广义谐波进行综合治理具有重要的研究价值。在治理电能质量的电力电子装置中，混合有源电力滤波器具有颇高的性价比。而广义谐波检测效果是混合有源电力滤波器进行治理的主要依据，因此本文旨在研究广义谐波的优化检测方法，以提高检测的准确性和实时性。首先，对混合有源电力滤波器的拓扑结构和分类进行了深入的研究，阐述了其四个主要功能模块的工作原理，为研究广义谐波检测方法奠定理论基础。其次，根据混合有源电力滤波器对检测效果的要求，分析了基于传统瞬时无功功率理论检测方法中的变换矩阵、锁相环及低通滤波器三个环节的工作局限性，为广义谐波优化检测方法的提出提供前提。再次，提出一种基于广义瞬时无功功率理论的广义谐波优化检测方法，其针对传统检测方法的工作局限性，做了三个方面的优化工作：一是将检测方法中的平面变换矩阵扩展至空间变换矩阵，提高矩阵变换的可靠性；二是在检测方法的锁相环节，提出了单相广义锁相环和三相广义锁相环的锁相方法，通过简单的逻辑运算和矩阵变换实现对电网电压的基波正序分量正余弦信号的同步提取，能提高相位锁定的成功率，改善检测方法的准确性；三是在检测方法的低通滤波环节，提出一种广义加权形态滤波器取代传统的低通滤波器，以数学形态学理论为基础，采用其四种最基本的运算法则，通过合理选择结构元素，构成主从开-闭、闭-开两种迭代滤波器，并结合自适应对消技术，将两种迭代滤波器的输出信号分别与广义锁相环锁定的基波正序电压正余弦信号进行加权组合，输出直流信号，以提高检测方法的实时性。最后，对传统检测方法和本文所提的优化检测进行仿真对比和实验研究，结果表明，在各种工况下的单相、三相系统中，本文所提出的广义谐波优化检测方法在响应速度和检测精度上都优于传统检测方法，验证了其有效性和可行性。
[Abstract]:With the harmonic, reactive and negative sequence and zero power quality pollution is becoming increasingly serious, they will integrate the comprehensive management for the generalized harmonic has important research value. In the power electronic devices in power quality control of hybrid active power filter with high cost. And the detection effect is mainly based on generalized harmonic mixing active power filter control, optimization of detection method therefore this paper aims to study the generalized harmonic, in order to improve the detection accuracy and real-time.
Firstly, the topology and classification of hybrid active power filter are deeply studied, and the working principles of four main functional modules are expounded, which lays a theoretical foundation for studying generalized harmonic detection method.
Secondly, according to the requirements of hybrid active power filter for detection performance, analyzes the transformation matrix of the traditional detection method of instantaneous reactive power theory based on the work limitations of PLL and low pass filter three links, providing the prerequisite for the optimization of the generalized harmonic detection method is proposed.
Again, put forward a generalized optimal harmonic detection method based on generalized instantaneous reactive power theory, the traditional detection methods of work limitations, do the optimization work in three aspects: one is to be extended to the space plane transformation matrix transformation matrix in the detection method, the invention has high reliability matrix transformation; two is locked link detection method, proposed method of single phase locked loop and phase-locked generalized generalized three-phase PLL, realize the synchronous extraction of fundamental positive sequence voltage of the cosine signals through simple logic operations and matrix transform, phase locking can improve the success rate, improve the accuracy of the detection method; three is a low pass filter in the detection method, proposed a generalized weighted morphological filter to replace the traditional low pass filter, mathematical morphology theory, using the basic algorithm Then, through reasonable selection of structure elements, a master-slave open close and close open two iterative filter, and adaptive cancellation technology, fundamental positive voltage output signal of the two kinds of iterative filter with generalized cosine signal of the PLL is locked by the weighted combination of the output DC signal, in order to improve the real-time detection. Methods.
Finally, simulation and experimental research, the optimization of the detection of traditional detection methods and the results show that the single phase under various working conditions, in a three-phase system, the generalized harmonic detection optimization method proposed in this paper in response to the traditional detection speed and detection accuracy is superior, verify its validity and feasibility.

【学位授予单位】：湖南工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN713.8;TM935

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