基于三电平双Buck全桥逆变器的单相并联有源滤波器
发布时间：2019-04-09 08:39
【摘要】：随着电力电子技术的突飞猛进和电气装置的广泛应用,谐波污染愈发恶化。电力谐波污染问题的解决方案目前主要有两种。一种是“防病”法,通过优化产品自身性能,降低产品自身的谐波发出。该方法仅对用电设备自身性能改进,减少了谐波源对电网污染。但供电系统庞大复杂,电网自身的电力电子器件开关工作状态不可避免产生较大谐波污染,因此必须采用另一种方式即在电网安装谐波抑制装置。无源与有源电力滤波器是谐波抑制装置的两大类。无源电力滤波器虽然构成简单、技术成熟、稳定性强且运行成本低但其附加损耗高,效率较低且动态补偿效果差所以逐渐被性能突出的有源滤波器替代。本研究在传统有源滤波器设计的基础上使用三电平双Buck全桥逆变器作为主拓扑来实现模块化有源滤波器(Active Power Filter,APF)的功能。文中首先对比分析了多种有源滤波器的主拓扑方案,在总结了各种拓扑优缺点的情况下论证了用三电平双Buck全桥逆变器作为主要拓扑,解决了系统桥臂直通与功率开关管的体二极管反向恢复问题并且降低了开关损耗,优化了系统效率。然后对系统的检测与控制方案进行了择优选择;接着分别从硬件与软件出发对本研究中所涉及的各功能单元展开详细论述;最后,文中给出了本研究中原理样机的主要测试结果,并提出了相应的改进设想方案。根据研究的实验测试结果证明:本课题所设计的有源滤波器的原理样机不仅在输出功率、各次谐波含量和THD等指标上能够满足设计指标,而且具有良好的稳定性和人机对话等功能。
[Abstract]:With the rapid development of power electronics technology and the wide application of electrical devices, harmonic pollution is getting worse and worse. There are two main solutions to the problem of power harmonic pollution. One is the "disease prevention" method, by optimizing the performance of the product itself, reduce the harmonic emission of the product itself. This method only improves the performance of electric equipment and reduces the pollution of harmonic source to power grid. However, the power supply system is huge and complex, and the switching state of power electronic devices will inevitably produce large harmonic pollution. Therefore, it is necessary to install harmonic suppression device in the power network in another way. Passive and active power filters are two kinds of harmonic suppression devices. Although the passive power filter is simple in structure, mature in technology, strong in stability and low in operation cost, it has high additional loss, low efficiency and poor dynamic compensation effect, so it is gradually replaced by active power filter with outstanding performance. In this paper, based on the traditional active power filter design, a three-level dual Buck full-bridge inverter is used as the main topology to realize the modular active power filter (Active Power Filter,APF) function. In this paper, the main topology schemes of various active power filters are compared and analyzed firstly, and the advantages and disadvantages of various topologies are summarized, and the use of three-level double Buck full-bridge inverter as the main topology is demonstrated. The reverse recovery of the body diode between the bridge arm and the power switch tube is solved, the switching loss is reduced, and the efficiency of the system is optimized. Then the detection and control scheme of the system is selected, and then the function units involved in the research are discussed in detail from the hardware and software. Finally, the main test results of the prototype are given, and the corresponding improvement scheme is put forward. According to the experimental results, it is proved that the prototype of active power filter designed in this paper can not only meet the design index in terms of output power, harmonic content of each order and THD, etc. And has good stability and man-machine dialogue and other functions.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN713.8;TM761;TM464
，
本文编号：2455006
[Abstract]:With the rapid development of power electronics technology and the wide application of electrical devices, harmonic pollution is getting worse and worse. There are two main solutions to the problem of power harmonic pollution. One is the "disease prevention" method, by optimizing the performance of the product itself, reduce the harmonic emission of the product itself. This method only improves the performance of electric equipment and reduces the pollution of harmonic source to power grid. However, the power supply system is huge and complex, and the switching state of power electronic devices will inevitably produce large harmonic pollution. Therefore, it is necessary to install harmonic suppression device in the power network in another way. Passive and active power filters are two kinds of harmonic suppression devices. Although the passive power filter is simple in structure, mature in technology, strong in stability and low in operation cost, it has high additional loss, low efficiency and poor dynamic compensation effect, so it is gradually replaced by active power filter with outstanding performance. In this paper, based on the traditional active power filter design, a three-level dual Buck full-bridge inverter is used as the main topology to realize the modular active power filter (Active Power Filter,APF) function. In this paper, the main topology schemes of various active power filters are compared and analyzed firstly, and the advantages and disadvantages of various topologies are summarized, and the use of three-level double Buck full-bridge inverter as the main topology is demonstrated. The reverse recovery of the body diode between the bridge arm and the power switch tube is solved, the switching loss is reduced, and the efficiency of the system is optimized. Then the detection and control scheme of the system is selected, and then the function units involved in the research are discussed in detail from the hardware and software. Finally, the main test results of the prototype are given, and the corresponding improvement scheme is put forward. According to the experimental results, it is proved that the prototype of active power filter designed in this paper can not only meet the design index in terms of output power, harmonic content of each order and THD, etc. And has good stability and man-machine dialogue and other functions.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN713.8;TM761;TM464
，
本文编号：2455006
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