节点文献
基于DSP的在线式数字化UPS的研究
【作者】 廉柯；
【导师】 申群太；
【作者基本信息】 中南大学 ， 控制科学与工程， 2010， 硕士
【摘要】 不间断电源(Uninterruptible Power Supply)是一种能够提供优质电能并保证电力供应连续的电力电子装置,已经广泛地应用于众多领域。在众多不间断电源中,在线式UPS的性能最好,应用最为广泛。随着高性能控制芯片的出现,UPS的数字化控制成为一种发展的趋势。本文采用TMS320F2812作为系统的核心控制芯片,研究和开发数字化的在线式单相不间断电源。首先介绍了UPS电源的分类、发展现状以及未来发展方向。然后以单相在线式UPS主电路的拓扑结构为基础,介绍了系统的各个部分,重点分析了UPS主电路中两个最重要的部分——输入功率因数环节和逆变环节,建立了逆变环节的连续状态空间模型和离散状态空间模型。分析了用于逆变波形控制的几种控制策略,针对负载的扰动及谐波周期出现的特点,采用了重复控制来提高逆变输出的稳态性能,并结合PI控制来改善逆变输出的动态性能。将重复控制与传统PI控制结合起来应用于UPS逆变电源,重点分析了重复控制的理论并进行参数设计,利用MATLAB软件进行仿真研究,建立了系统的仿真模型,对比研究复合控制和PI控制,仿真结果证实了该复合控制具有优良的性能。在上述理论研究之后,给出了UPS系统的硬件设计,介绍了相关功率电路,结合DSP控制芯片的结构特点,分析了系统的控制电路、检测电路以及其他辅助电路。在硬件设计的基础上,进行了系统的软件设计。
【Abstract】 Uninterruptible Power Supply (UPS) is an electronic device which provides high quality and uninterruptible electronic power. It has been widely used in many fields. The capability of the on-line UPS is the best among all kinds of UPS. With the appearance of high performance DSP controller, digital control of UPS becomes a trend in its development. The dissertation focuses on the research of the digital online UPS in which TMS320F2812 is considered as the core chip.The dissertation introduces the retrospection and the classification of the UPS. Based on the point of the topology of the main circuit, the dissertation analyzes the characteristics of the respective power circuit of UPS. A detail analysis of APFC and invert segment is proposed, which are the most important parts in the UPS system. Continuous state-space model and discrete state-space model of inverter are established. The dissertation analyses the present control patterns of inverter. Taking into account that the disturbance and high frequency waveform of inverter output voltage appear periodically, this dissertation uses repetitive control to improve the steady state qualification of the inverter output and PI control to improve the transient qualification of the inverter output. This dissertation combines repetitive control and the traditional PI control technique and analyses the principle of repetitive control and parameter selection. It has studied by simulation used MATLAB software, and compared multiple control with PI control. Through the simulation results, it confirms that the multiple control has an excellent performance.Based on the theory analysis, the hardware implementation block diagram of the UPS system is proposed. It includes the power system design and the control system design used DSP. After the hardware implementation discussed above, the software design of the UPS system is also described.