【作者】 王子洋；

【导师】 吴忠强；

【作者基本信息】 燕山大学 ， 控制理论与控制工程， 2005， 硕士

【摘要】 近年来,由于电力电子技术的发展,逆变电源的应用深入到各个领域,在应用中一般要求逆变电源具有高质量的输出波形。逆变电源输出波形质量主要包括两个方面:一是稳态精度高;二是动态性能好。因此研究既简单又具有优良动、静态性能的逆变电源控制方案,一直是电力电子领域的研究热点问题。 论文在查阅大量国内外文献的基础上,针对单相逆变电源系统提出了几种新型控制方案,其主要内容如下: 从逆变电源输出特性的理论分析入手,根据逆变电源的数学模型,建立了单相 SPWM 逆变电源完整的 MATLAB 仿真模型。为了获得高性能的逆变电源,依据所建立的数学模型和仿真模型,将智能控制与常规控制相结合,提出了系列新型单相逆变电源设计方案:模糊自整定 PI 双闭环控制设计方案、模糊自整定二自由度 PID 控制器设计方案、模糊自整定 PI 控制和重复控制相结合的复合控制设计方案。并且对模糊自整定 PI 双闭环控制设计方案进行了实验研究。从大量的仿真和实验结果中可以看出输出电压波形具有较低的总谐波畸变率(THD),同时还获得了良好的稳态和动态特性,说明了所提出的三种控制方案都能够较好地满足逆变电源的控制要求。 此外,论文还针对逆变电源系统,提出一种基于神经网络内模预估的模糊控制方案。该控制方案能够克服系统参数摄动或外界扰动对系统造成的影响,使系统具有一定的鲁棒性和抗扰性。仿真结果验证了理论分析的正确性。更多还原

【Abstract】 In recent years, with the development of power electronics technology, inverter is used in every field and the high quality of output waveform is required in these applications. There are two aspects for the quality of output waveform: high steady-state precision and fine transient response. So the study on simple control with good static and dynamic performance is a hot spot in power electronic fields. On referring to lots of literatures, this paper summarizes the current research situation of control techniques of inverters. The main contents of the paper as follows: First, with the theory analysis of the output characteristic of inverter, the paper set up complete MATLAB simulation model of single-phase SPWM inverter basing on the mathematic model of inverter. Second, in order to get high-capability inverter, the paper combine intelligent control with conventional control and summarizes the new designing scheme of single-phase inverter basing on the mathematic model and simulation model: designing scheme of double close-loop control based on fuzzy self-tuning PI; designing scheme of two degree-of-freedom PID controller based on fuzzy self-tuning; Compound control designing scheme of combining fuzzy self-tuning PI control with repetitive control. The paper makes experimental research for its designing scheme of double close-loop control based on fuzzy self-tuning PI. The simulation and experiment results show low THD of output-voltage waveform and the system achieves good dynamic and static characteristic. These three control schemes can satisfy the controlling require of inverter. In addition, a control method of fuzzy control based on internal model of artificial neural network is presented for single-phase SPWM inverter. The method can adapt to the variations of the plant parameter, the performances are still satisfactory under wide operation ranges, robustness and disturbance rejection are greatly improved. The simulation results prove validity of theory analysis.更多还原