双降压式三相有源电力滤波器的研究

发布时间：2018-01-04 16:01

本文关键词：双降压式三相有源电力滤波器的研究　出处：《哈尔滨理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：伴随功率开关管制造水平的提高，大量功率电路的应用改变了人们的生活，但随之而来的却是电网电流谐波含量显著增加的问题。当今，，有源电力滤波技术是解决电网中电能质量问题的有效手段之一，该系统可以跟踪电网中频率和幅值均变化的谐波，并且进行有效补偿。其中，并联型有源电力滤波器在该领域占据着主流地位，是各国学者研究的重点。本文在对许多科技文献的认真研究与对比分析之后，详细阐述了有源电力滤波器的研究进展及发展趋势。通过分析传统逆变电路的不足，以及对双降压逆变电路的研究，提出了将双降压式逆变电路应用于三相三线制并联型有源电力滤波器中。双降压逆变电路由于没有开关管的串联，有效防止桥臂直通，省去传统逆变电路所必需的死区电路。对于谐波检测算法，详细推导了比较新颖的FBD谐波检测法，同时将其与目前比较常用的ip-iq谐波电流检测法进行比较，通过原理分析和推导，发现上述两种方法在算法思想上是一致的。但FBD谐波电流检测算法没有矩阵变换，结构简洁，易于编程。对于电流控制算法，选用工程中应用广泛的三角波线性控制，并针对主电路结构进行算法优化，设计了基于FBD检测法的双降压式三相有源电力滤波器。对系统主要元件取值范围进行了理论推导与数学计算，利用电力系统分析中常用的PSCAD/EMTDC仿真软件进行仿真分析，建立了仿真模型系统。在稳态情况下，研究了其对于阻感和阻容非线性负载的补偿情况；在动态情况下，研究了系统对于阻感负载的补偿能力，仿真结果说明了本文所设计系统的正确性。在此基础上，本文搭建了三相双降压式有源电力滤波器硬件实验平台。实验结果表明基于FBD检测法的双降压式有源电力滤波器可以对电网中的谐波分量进行有效的补偿，投入使用后电网电能质量显著提高，实现既定目标。
[Abstract]:With the improvement of power switch manufacturing level, the application of a large number of power circuits has changed people's lives, but followed by a significant increase in the power grid current harmonic content. Active power filter is one of the effective methods to solve the power quality problem in power network. The system can track the harmonics with varying frequency and amplitude and compensate effectively. Shunt active power filter (shunt active power filter) occupies the mainstream position in this field and is the focus of scholars all over the world. After careful research and comparative analysis of many scientific and technological documents, this paper expounds the research progress and development trend of active power filter in detail, and analyzes the shortcomings of the traditional inverter circuit. As well as the research of double step-down inverter circuit, it is put forward that the double step-down inverter circuit is applied to the three-phase three-wire shunt active power filter. The double step-down inverter circuit has no switching tube in series. Effectively prevent the bridge arm through, and eliminate the dead time circuit necessary for the traditional inverter circuit. For the harmonic detection algorithm, a novel FBD harmonic detection method is derived in detail. At the same time, it is compared with the current ip-iq harmonic current detection method, through the principle analysis and derivation. It is found that the above two methods are consistent in the algorithm, but the FBD harmonic current detection algorithm has no matrix transformation, simple structure, easy to program, for the current control algorithm. The triangulation wave linear control which is widely used in engineering is selected and the algorithm is optimized for the main circuit structure. A dual-step-down three-phase active power filter based on FBD detection method is designed. The value range of the main components of the system is deduced and calculated in theory, and the simulation analysis is carried out by using the PSCAD/EMTDC simulation software commonly used in power system analysis. The simulation model system is established. In the steady state, the compensation of resistive and resistive nonlinear loads is studied. Under the dynamic condition, the compensation ability of the system to the resistive load is studied, and the simulation results show the correctness of the system designed in this paper. In this paper, a hardware experimental platform of three-phase dual-step-down active power filter is built. The experimental results show that the dual-step-down active power filter based on FBD detection method can effectively compensate the harmonic components in the power network. After put into use, the power quality of the power grid has been improved significantly, and the established goal has been achieved.
【学位授予单位】：哈尔滨理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN713.8;TM761

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