某波磁通补偿式串联混合型有源滤波器的研究

发布时间：2018-01-14 09:35

本文关键词：某波磁通补偿式串联混合型有源滤波器的研究　出处：《南京邮电大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着现代电力电子技术的发展,电力系统中谐波污染的日益加重,为了对电能质量进行改善,大量关于有源滤波器的研究正如火如荼地展开。传统的有源滤波器通过逆变器输出与谐波电流相反的电流抵消谐波,所以需要控制逆变器跟踪谐波电流,其难度非常大。不同于传统有源滤波器,基波磁通补偿式串联混合型有源滤波器只需要控制逆变器跟踪基波电流,电流控制难度大大降低。本文对基波磁通补偿式串联混合型有源滤波器的工作原理进行了分析研究,以其电流控制电路为核心进行了数学建模及仿真,分析其电流控制电路的各项参数对滤波效果的影响。针对基波检测模块设计了一种采用开关电容滤波器的基波检测电路及其等幅移相电路,仿真显示其基波检测效果良好。分析对比了目前主流的几种电流控制方式的优缺点并重点研究了滞环电流控制和三角波比较电流控制这两种电流控制策略。通过理论分析和仿真研究发现,滞环电流控制法跟踪误差小,响应速度快,但其开关频率不固定;三角波比较控制的开关频率固定,等于其三角波频率,且跟踪精度较高,但系统鲁棒性和响应速率不如滞环控制法。文章最后引入了一种采用低自感串联变压器的有源滤波器,一般的有源滤波器在有源部分发生开路故障的时候负载会发生断电,而这种滤波器可以在发生开路故障时随时退出运行,并在负载短路时限制短路电流,仿真结果表明其滤波效果明显。基波磁通补偿式串联混合型有源滤波器不同于当前主流的有源滤波器,虽然有一定的优势但也有明显的缺点,需要在今后的研究中进一步完善其功能。
[Abstract]:With the development of modern power electronics technology, harmonic pollution in power system is becoming more and more serious, in order to improve the power quality. A large number of active power filter research is in full swing. The traditional active power filter outputs the harmonic current opposite to the harmonic current, so it is necessary to control the inverter to track the harmonic current. It is very difficult. Different from the traditional active power filter, the fundamental flux compensation series hybrid active power filter only needs to control the inverter to track the fundamental current. The difficulty of current control is greatly reduced. In this paper, the working principle of the fundamental flux compensation series hybrid active power filter is analyzed and studied, and its current control circuit is used as the core of the mathematical modeling and simulation. The influence of the parameters of the current control circuit on the filtering effect is analyzed. A fundamental detection circuit with switched capacitor filter and its equal amplitude phase shift circuit are designed for the fundamental detection module. The simulation results show that the fundamental wave detection effect is good. The advantages and disadvantages of several current control methods are analyzed and compared, and the hysteresis current control strategy and the triangle wave comparison current control strategy are studied. Theoretical analysis and simulation findings. The hysteresis current control method has small tracking error and fast response speed, but its switching frequency is not fixed. The switching frequency of triangle wave comparison control is fixed, which is equal to its triangle wave frequency, and the tracking accuracy is high. However, the robustness and response rate of the system are not as good as the hysteresis control method. Finally, an active filter with low self-inductance series transformer is introduced. The general active power filter in the active part of the open circuit failure occurs when the load will be cut off, but this kind of filter can be at any time in the open circuit fault out of operation, and when the load short circuit limit short circuit current. Simulation results show that the filtering effect is obvious. The fundamental flux compensation series hybrid active filter is different from the current mainstream active power filter, although it has some advantages but also has obvious shortcomings. It is necessary to further improve its function in the future research.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN713.8;TM761

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