基于嵌入式实时操作系统的全数字在线式UPS的设计

发布时间：2018-03-18 00:24

本文选题：功率因数校正　切入点：三电平逆变器　出处：《安徽理工大学》2013年硕士论文　论文类型：学位论文

【摘要】：UPS(不间断电源)在通信、金融、工业控制等领域应用广泛。而目前国内对于数字化在线式UPS的研究,尤其是大功率的设备相对国外先进水平还比较薄弱。本文提出一种基于嵌入式实时操作系统的全数字在线式单进单出的交流不间断电源的设计方案,并制作样机调试完毕。本文提出一种结构简单的PFC(Power Factor Correction,功率因数校正电路)的拓扑结构,直流侧采用双BUS(直流母线),但是正、负BUS共用一个储能电感,相比较于传统的双BUS电路拓扑节省了一个电感。PFC部分,从PFC电路的硬件选型到建立PFC电路的交流小信号模型到基于重复控制PID控制、前馈控制等控制理论的控制系统架构的建立,最后在DSP56F8356(数字信号处理器)上实现了该控制算法,并在整机上调试成功。逆变器部分,采用二极管钳位的单相三电平逆变,有效的降低了IGBT的耐压要求,而控制上只要设置合适的开关函数就能转化成与单相半桥逆变电路的一样。本文设计了单相三电平逆变电路的输出滤波器、建立了单相三电平逆变器的基于状态空间平均法的数学模型,提出了基于重复控制、比例控制、前馈控制的控制器,并在DSP56F8356上实现了该控制算法,最终在样机上调试完毕。在控制电路方面设计了电压、电流的采样电路,IGBT的驱动电路、静态开关的驱动电路、DSP56F8356最小系统的设计、介绍了DSP56F8356的AD模块、PWM模块等与硬件相关的片上资源,并调试好。鉴于传统的前后台系统的一些制约,本文提出了基于嵌入式实时操作系统的软件架构。文中详细介绍了如何将嵌入式实时操作系统移植到DSP56F8356上,如何划分UPS控制软件的任务,UPS系统软件的主要时序等内容。
[Abstract]:Ups (Uninterruptible Power supply) is widely used in communication, finance, industrial control and other fields. Especially, the high power equipment is relatively weak compared with the advanced level of foreign countries. This paper presents a design scheme of all digital on line single input and single output AC uninterruptible power supply based on embedded real time operating system, and makes a prototype for debugging. In this paper, a simple topology of PFC(Power Factor Correction (PFC) is proposed. The DC side uses double bus (DC bus), but positive and negative BUS share a single energy storage inductor. Compared with the traditional double BUS circuit topology, it saves an inductor. PFC part, from the hardware selection of PFC circuit to the establishment of AC small-signal model of PFC circuit to PID control based on repetitive control. Finally, the control algorithm is implemented on DSP 56F8356 (Digital signal processor), and successfully debugged on the whole machine. In the inverter, single-phase three-level inverter with diode clamps is used. The voltage requirement of IGBT is reduced effectively, and the output filter of single-phase three-level inverter circuit is designed in this paper, which can be converted to the same as that of single-phase half-bridge inverter circuit by setting appropriate switching function. The mathematical model of single-phase three-level inverter based on state space averaging method is established, and the controller based on repetitive control, proportional control and feedforward control is proposed, and the control algorithm is implemented on DSP56F8356. Finally, the debugging is finished on the prototype. In the aspect of control circuit, the driving circuit of IGBT is designed for the sampling circuit of voltage and current, and the driving circuit of static switch is designed for DSP56F8356 minimum system. This paper introduces the AD module and PWM module of DSP56F8356 and other related on-chip resources, and debugs them well. In view of the limitations of the traditional front and background system, this paper proposes a software architecture based on embedded real-time operating system, and introduces in detail how to transplant the embedded real-time operating system to DSP56F8356. How to divide the task of UPS control software and the main time sequence of UPS system software etc.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TP368.12;TM464

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