并联型有源滤波器谐波检测与控制技术研究

发布时间：2018-01-11 21:22

本文关键词：并联型有源滤波器谐波检测与控制技术研究　出处：《浙江大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着电气化程度不断提高,电能质量问题日益引起人们关注,其中由于各种电力电子装置广泛应用于各行各业造成的谐波污染问题尤为突出。有源滤波器以其高度可控性、快速响应性、不受系统参数影响等优点,在抑制谐波和补偿无功中占有重要地位,成为国内外研究热点。并联型有源滤波器的基本原理是向电网注入补偿电流,使电网电流成为理想的正弦波,主要性能指标为动态响应速度和稳态补偿精度。为了优化有源滤波器的补偿效果,本文对有源滤波器的谐波检测和控制技术展开研究。首先建立了三相三线制并联型APF在同步旋转坐标系下的数学模型,并设计了三相数字锁相环,为谐波检测和电流控制奠定基础。其次分析了基于瞬时功率理论的谐波检测方法和离散傅里叶变换检测方法。利用广义积分器能够无稳态误差地跟踪正弦信号的基本原理,设计了多组广义积分控制器并联,从而可以检测出50次内的任意次谐波。常规的PI控制只能实现直流信号的无差跟踪,而APF的参考信号是不同频率周期信号的叠加,因此采用PI-重复控制的复合控制方法,完成了复合控制系统的参数设计,仿真和实验证明了有效性。结合作者参与的科研项目：大功率三相三线制并联型有源滤波器的研制,根据装置需求,研究了整体数字控制系统的实现。完成了数字控制系统的硬件设计和软件设计,包括DSP核心控制板的设计、外围电路的设计以及软件编程设计。基于虚拟仪器LabWindows/CVI开发平台,利用工控机实现人机交互界面。上位机采用CAN通信方式与DSP传输数据,能够实时监测系统的运行状态,具有设置控制参数、查询故障等功能,协助DSP控制系统。
[Abstract]:With the increasing degree of electrification, people pay more and more attention to the problem of power quality. Among them, the harmonic pollution caused by various power electronic devices is particularly prominent. Active filter has the advantages of high controllability, fast response and no influence by system parameters. It plays an important role in harmonic suppression and reactive power compensation, and has become a research hotspot at home and abroad. The basic principle of shunt active power filter (APF) is to inject compensating current into the power network, which makes the current of the power network an ideal sinusoidal wave. The main performance indexes are dynamic response speed and steady-state compensation accuracy. In order to optimize the compensation effect of active power filter, the harmonic detection and control techniques of active power filter are studied in this paper. Firstly, the mathematical model of three-phase three-wire parallel APF in synchronous rotating coordinate system is established, and the three-phase digital phase-locked loop is designed. It lays the foundation for harmonic detection and current control. Secondly, the harmonic detection method based on instantaneous power theory and discrete Fourier transform detection method are analyzed. The generalized integrator can track sinusoidal signal without steady-state error. Basic principles. Several sets of generalized integral controllers are designed in parallel, which can detect any harmonics within 50 times. Conventional Pi control can only realize differential tracking of DC signal. The reference signal of APF is the superposition of different frequency periodic signal, so the parameter design of the compound control system is completed by using the compound control method of PI- repetitive control, and the validity of simulation and experiment is proved. Combined with the research project of the author's participation: the development of high-power three-phase three-wire shunt active power filter, according to the requirements of the device. The hardware design and software design of the digital control system, including the design of the DSP core control board, are completed. Peripheral circuit design and software programming. Based on virtual instrument LabWindows/CVI development platform. The man-machine interface is realized by the industrial control computer, and the upper computer transmits data with DSP through CAN communication mode, which can monitor the running state of the system in real time, and has the functions of setting control parameters and querying faults. Assist DSP control system.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM761;TN713.8

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