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摘要：双馈电机是一种结构简单、坚固可靠、异同步通用的电机，可以实现异步、同步、双馈等多种运行方式。具有变频器容量小，功率因数可调等特点。既可作为电动机运行用于交流调速传动系统， 也可作发电机运行用于变速恒频恒压发电系统，由于系统控制方法的灵活性与多样性，使得双馈电机调速在在风机和泵类机械的节能调速系统及变速恒频的水力和风力发电系统中具有广阔的应用前景。 本文对双馈电机控制系统进行了较为深入的研究， 首先分析双馈电机基本结构、运行原理的基础上，推导和建立了双馈电机调速的数学模型，然后就双馈电机目前通用模型，定、转子坐标下的双轴模型进行了分析，对转子双轴模型进行了深入研究，利用 matlab/simulink 仿真软件建立了双馈电机调速系统仿真模型，并对双馈运行模式进行了仿真研究，验证了双馈电机的运行机理和性能特性。系统模型建立在以定子电压定向的同步旋转坐标轴系中， 可以实现双馈电机转速与无功功率的解耦控制。仿真结果表明，该控制原理和方法比较适用于双馈电机的控制系统，能有效的对电机的转速进行动态控制，具有较好的动态性能。本文所完成的工作，对于双馈电机调速系统的发展具有现实意义，对双馈电机及其系统进一步实用化研究奠定了基础。 35962
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毕业论文关键词： 双馈电机；变频调速；系统仿真；定子电压定向；矢量控制
The Design For Variable Speed System of Doubly-fed machine
Abstract Doubly-fed motor is a kind of simple structure, strong reliable, different generic synchronous motor, can realize asynchronous, synchronous, doubly-fed a variety of ways to run and so on.Has a small capacity of the inverter, adjustable power factor, etc.Can be used as a motor to drive running for ac speed regulation system, also can make generator operation used in variable speed constant frequency constant pressure generating system, the flexibility and persity of the system control method, makes the doubly-fed motor speed control in fan and pump mechanical energy saving speed regulation system and the variable speed constant frequency wind power and hydroelectric system has broad application prospects. In this paper, thorough research the doubly-fed motor control system , first of all, analysis of doubly-fed motor on the basis of the basic structure, operation principle, derivation and established the mathematical model of doubly-fed motor, the universal model, and then doubly-fed motor, the rotor coordinates of biaxial model was analyzed, and the rotor biaxial model were studied, using matlab/simulink simulation software to establish the simulation model of doubly-fed motor speed regulating system and the simulation for the operation mode of doubly-fed, verify the effectiveness of the doubly-fed motor operation mechanism and performance characteristics.System model based on to the synchronous rotation axes of stator voltage, can realize the doubly-fed motor speed and reactive power decoupling control.Simulation results verify that the control principle and method more suitable for doubly-fed motor control system, can effectively to dynamic control of motor speed, has good dynamic performance.The work of this paper has the practical significance for the development of the double-fed motor speed control system , and laid the foundation of its system of doubly-fed motor further practical research .
Keywords: doubly-fed motor; stator voltage oriented vector control; variable frequency speed ; control system simulation
目录
1 绪论 1
1.1 双馈电机调速系统的产生 . 1
1.2 异步电机双馈调速应用 . 2
1.3 本文主要研究内容及工作安排 . 3
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