三相高功率因数PWM整流器的设计与开发

发布时间：2018-01-08 19:12

本文关键词：三相高功率因数PWM整流器的设计与开发　出处：《湖南大学》2014年硕士论文　论文类型：学位论文

【摘要】：由于电力电子设备的非线性，，造成网侧电流畸变，对电网的安全以及电能质量造成了极大的影响。电力系统谐波污染的危害性已经越来越引起人们的关注，国际上提出了很多方案用来解决传统的大功率整流器电流谐波高，功率因素低的问题。由于三相PWM整流器具有输出电压恒定，输入功率因数可调，可以有效的降低谐波，甚至实现电能的双向流动等优点，PWM整流器常被用作电网与用电设备之间的接口，PWM整流技术以及高功率因素、低谐波的整流装置的的研制已经成为全世界研究的热点。本文研究的主要内容归纳如下：（1）本文首先介绍了普通三相PWM整流器的半桥主电路拓扑结构，并以主电路拓扑为基础，介绍了PWM整流器在两相静止αβ坐标和两相旋转dq坐标下的数学模型。最后，从四象限变流原理出发分析了三相PWM整流器的工作原理以及工作过程，介绍了直接电流控制的控制方法，采用双闭环控制策略，并采用SVPWM调制方法，可以使三相PWM整流器运行在高功率或者达到单位功率因数状态。（2）以TI公司DSP芯片TMS320F28335为核心，设计了系统的总体方案，包括控制器的选型以及整个系统的框架。设计了三相PWM整流器的硬件部分包括信号调理板，主控板，辅助电源板，主电路，驱动板。详细介绍了每一块电路板的设计步骤，参数选择，设计原理图，将设计的电路板组成一套三相高功率因数PWM整流器样机。（3）设计了基于三相高功率因数PWM整流器样机的软件系统，采用CCS进行软件编程，包括主程序和各种中断程序，给出了详细的程序流程图。最后对系统进行了MATLAB仿真以及实物装置测试，结果表明：三相PWM整流器实现了电网电流电压同频同相，功率因数接近于1，减小了系统对电网的谐波污染，并且系统具有良好的动态性能，达到了预期的设计要求。
[Abstract]:Because of the nonlinearity of power electronic equipment, the distortion of grid side current has a great impact on the security of power network and the power quality. The harm of harmonic pollution in power system has been paid more and more attention. Many schemes have been put forward to solve the problems of high current harmonic and low power factor in traditional high power rectifier. Because the output voltage of three-phase PWM rectifier is constant, the input power factor can be adjusted. PWM rectifier can effectively reduce harmonics, even realize the bi-directional flow of electric energy. PWM rectifier is often used as the interface between power grid and electrical equipment, as well as high power factor. The research of low harmonic rectifier has become a hot topic in the world. The main contents of this paper are summarized as follows: This paper first introduces the half-bridge main circuit topology of the ordinary three-phase PWM rectifier, and based on the main circuit topology. The mathematical model of PWM rectifier under two phase static 伪尾 coordinate and two phase rotating dq coordinate is introduced. Finally, the working principle and working process of three phase PWM rectifier are analyzed based on the four quadrant variable current principle. The control method of direct current control is introduced in this paper. Using double closed loop control strategy and SVPWM modulation method, three-phase PWM rectifier can be operated in high power or unit power factor state. Based on the DSP chip TMS320F28335 of TI Company, the overall scheme of the system is designed. The hardware of three-phase PWM rectifier includes signal conditioning board, main control board, auxiliary power supply board and main circuit. The design steps, parameter selection and design schematic of each circuit board are introduced in detail. A set of three-phase high power factor PWM rectifier prototype is formed by the designed circuit board. The software system based on three-phase high-power factor PWM rectifier prototype is designed. The software program is programmed by CCS, including main program and various interrupt programs, and the detailed program flow chart is given. Finally, the MATLAB simulation and physical device test are carried out. The results show that the three-phase PWM rectifier achieves the same frequency and phase of current and voltage, and the power factor is close to 1. The harmonic pollution of the system is reduced, and the system has good dynamic performance and meets the expected design requirements.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM461

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