基于DSP的中压变频器关键技术研究

发布时间：2018-04-11 00:14

本文选题：60°坐标 + SVPWM　；参考：《安徽工程大学》2012年硕士论文

【摘要】：目前,我国的电力资源十分匮乏,特别是煤炭和石油资源稀少,已经制约我国经济的长足发展。合理利用和开发新能源已经是我国目前主要工作之一,针对通风机,水泵,空压机,电机等能源消费较大的行业进行需要重点治理和采取新节能措施保证能源的利用率。最先采取的措施就是采用交流变频方式调速,随着电气传动技术的快速发展,交流调速系统技术获得了快速发展。有关资料表明电力系统60%左右的发电量被各种电机和风机消耗,在交流调速技术中,变频调速以其特有的稳定性好,响应快速,宽的调速范围和良好的节能效果在工业中应用越来越广泛,并且随着技术的发展价格不断降低。变频器由最初的变压变频(VVVF)方式发展到现在的矢量控制,直接转矩控制以及刚刚兴起的SVPWM矢量控制算法,使变频控制不仅具有了高稳态的控制特性,同时也具有了良好的动态性和较强的鲁棒性,可以和直流调速系统相比。本文针对基于DSP的中压变频器控制算法进行了研究与相关设计本文首先介绍了国内外中压变频器的发展现状,详细介绍了中压变频器的优点和应用领域,详细分析了逆变器各种拓扑结构的工作原理和各自的优缺点。然后,在深入分析三电平逆变器拓扑结构工作原理的基础上,分析了两电平原理和传统三电平SVPWM实现方式,并在此基础上分析各个部分具体实现原理,并且仿真实现；通过对整个过程的分析提出一种在60。坐标系下快速实现SVPWM算法的原理结构,并且在MATLAB/SIMULINK下搭建上述三种仿真模型并给出仿真结果。对逆变器存在的中点电压不平衡现象进行原理分析,分别在硬件和软件上提出改进方法,并且对上述方法分别进行仿真验证,最后结果表明所述方法正确性和有效性。在硬件设计方面分别对主电路和外围控制电路进行了设计,详细给出了DSP的设计方法；最后进行了硬件电路的调试工作,结果表明了空间电压矢量算法可以满足逆变器的控制要求。
[Abstract]:At present, our country's electric power resources are very scarce, especially the coal and petroleum resources are scarce, which has already restricted our country's economic development.The rational utilization and development of new energy has been one of the main tasks in our country at present. It is necessary to take new energy-saving measures to ensure the utilization of energy in the industries with large energy consumption, such as fan, water pump, air compressor, motor and so on.With the rapid development of electric transmission technology, AC speed regulation system technology has been developed rapidly.The relevant data show that about 60% of the electric power generation is consumed by all kinds of motors and fans. In the AC speed regulation technology, the frequency conversion speed regulation has its unique stability and fast response.Wide speed range and good energy saving effect are more and more widely used in industry, and the price is decreasing with the development of technology.The frequency converter has developed from the original VVVF mode to the current vector control, direct torque control and the newly rising SVPWM vector control algorithm, which makes the frequency conversion control not only have the characteristics of high steady state control.At the same time, it also has good dynamic and strong robustness, which can be compared with DC speed regulation system.In this paper, the control algorithm of medium voltage inverter based on DSP is studied and related design is given.In this paper, the development status of medium voltage inverter at home and abroad is introduced, the advantages and application fields of medium voltage converter are introduced in detail, and the working principle and advantages and disadvantages of various topology structures of inverter are analyzed in detail.Then, on the basis of deeply analyzing the working principle of the three-level inverter topology, the two-level principle and the traditional three-level SVPWM realization method are analyzed, and on this basis, the concrete realization principle of each part is analyzed, and the simulation is realized.Based on the analysis of the whole process, a new method is proposed.The principle structure of SVPWM algorithm is realized quickly in coordinate system, and the three simulation models mentioned above are built under MATLAB/SIMULINK and the simulation results are given.This paper analyzes the principle of the unbalanced mid-point voltage in the inverter, and presents the improved methods in hardware and software, and simulates the above methods respectively. The results show that the proposed method is correct and effective.In the aspect of hardware design, the main circuit and peripheral control circuit are designed, the design method of DSP is given in detail, and the debugging work of hardware circuit is carried out.The results show that the space voltage vector algorithm can meet the control requirements of the inverter.
【学位授予单位】：安徽工程大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TM921.51;TP368.1

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