三相电压型PWM整流器控制系统的研究
发布时间：2018-12-17 15:31
【摘要】：近几年来，随着变流技术迅速崛起，变流技术的产品在生活和生产领域中得到广泛应用，但社会发展也对变流技术产品提出了更高的要求，特别是对谐波的抑制和治理要求不断提高。传统整流方式采用二极管不控整流，存在能量传输功率因数低、网侧电流畸变大等问题，给电网造成严重的影响。电压型三相半桥式PWM整流器具备单位功率因数运行、网侧电压和电流同步且正弦化等优点，满足绿色能源发展的要求，是学者近几年研究的热点。因此本文从如下几个方面展开研究工作： 首先，简单介绍电压型三相半桥式PWM整流器的基本工作原理，结合工程的实用性确定电压型三相半桥式整流器拓扑结构，在该拓扑结构的基础上进行了数学分析，并建立在旋转同步dq坐标系下的数学模型。介绍了几种常见的基于旋转同步dq坐标系数学模型的控制策略，并对这些控制策略进行了分析和研究。针对电压型三相半桥式PWM整流器的非线性、强耦合特性和工程设计难以实现等特点，提出了一种新型双闭环控制策略。其中电压外环采用滑模变结构控制，实现了直流侧电压稳定且可调；电流内环采用非线性PI控制和无电感参数L值前馈解耦相结合，即非线性PI无电感值L的前馈解耦控制，实现了系统快速跟随响应，，具有较强的抗干扰能力。并在Matlab/simulink进行了仿真研究，验证了这种控制方法的可行性和优越性。 其次，根据仿真和工程应用设计参数要求，对电压型三相半桥式PWM整流器的控制系统硬件与程序进行了设计，硬件设计主要介绍了主电路中各器件的数学计算、选型和各电路模块的设计等。程序设计主要介绍系统的主程序、系统子程序和控制策略子程序等；然后介绍了系统调试和整流器实物平台，其中系统调试给出了实验波形和相应结论。 最后介绍了整流器系统实物平台和系统调试运行的情况，给出了系统调试实验波形和相应结论，验证了电压型三相半桥式PWM整流器控制方法的准确性和优越性。
[Abstract]:In recent years, with the rapid rise of converter technology, the products of converter technology have been widely used in the field of life and production, but social development has also put forward higher requirements for the products of converter technology. In particular, the suppression of harmonic and management requirements continue to improve. The traditional rectifier adopts diode uncontrolled rectifier, which has some problems such as low power factor of energy transmission and large distortion of current on the grid side, which has a serious effect on the power grid. Voltage source three-phase half-bridge PWM rectifier has the advantages of unit power factor operation, voltage and current synchronization and sinusoidal, which meet the requirements of green energy development. Therefore, the research work of this paper is as follows: firstly, the basic working principle of voltage source three-phase half-bridge PWM rectifier is briefly introduced, and the topology structure of voltage source three-phase half-bridge rectifier is determined according to the practicability of engineering. On the basis of the topology, the mathematical model is established in the rotating synchronous dq coordinate system. Several common control strategies based on rotating synchronous dq coordinate system are introduced, and these control strategies are analyzed and studied. In view of the nonlinear, strong coupling characteristics and the difficulty in engineering design of the voltage source three-phase half-bridge PWM rectifier, a novel double-closed-loop control strategy is proposed. The voltage outer loop is controlled by sliding mode variable structure and the DC voltage is stable and adjustable. The current inner loop adopts the combination of nonlinear PI control and feedforward decoupling without inductance parameter L value, that is, the nonlinear PI feedforward decoupling control without inductance value L, which realizes the fast following response of the system and has strong anti-interference ability. The feasibility and superiority of this control method are verified by simulation research in Matlab/simulink. Secondly, according to the requirements of simulation and engineering application design parameters, the control system hardware and program of voltage source three-phase half-bridge PWM rectifier are designed. The hardware design mainly introduces the mathematical calculation of each device in the main circuit. Type selection and the design of each circuit module. The program design mainly introduces the main program, system subroutine and control strategy subroutine of the system, and then introduces the system debugging and rectifier physical platform, in which the system debugging gives the experimental waveform and corresponding conclusions. Finally, the physical platform of rectifier system and the debugging operation of the system are introduced. The waveform of system debugging experiment and the corresponding conclusions are given. The veracity and superiority of the control method of voltage source three-phase half-bridge PWM rectifier are verified.
【学位授予单位】：湘潭大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM461
本文编号：2384392
[Abstract]:In recent years, with the rapid rise of converter technology, the products of converter technology have been widely used in the field of life and production, but social development has also put forward higher requirements for the products of converter technology. In particular, the suppression of harmonic and management requirements continue to improve. The traditional rectifier adopts diode uncontrolled rectifier, which has some problems such as low power factor of energy transmission and large distortion of current on the grid side, which has a serious effect on the power grid. Voltage source three-phase half-bridge PWM rectifier has the advantages of unit power factor operation, voltage and current synchronization and sinusoidal, which meet the requirements of green energy development. Therefore, the research work of this paper is as follows: firstly, the basic working principle of voltage source three-phase half-bridge PWM rectifier is briefly introduced, and the topology structure of voltage source three-phase half-bridge rectifier is determined according to the practicability of engineering. On the basis of the topology, the mathematical model is established in the rotating synchronous dq coordinate system. Several common control strategies based on rotating synchronous dq coordinate system are introduced, and these control strategies are analyzed and studied. In view of the nonlinear, strong coupling characteristics and the difficulty in engineering design of the voltage source three-phase half-bridge PWM rectifier, a novel double-closed-loop control strategy is proposed. The voltage outer loop is controlled by sliding mode variable structure and the DC voltage is stable and adjustable. The current inner loop adopts the combination of nonlinear PI control and feedforward decoupling without inductance parameter L value, that is, the nonlinear PI feedforward decoupling control without inductance value L, which realizes the fast following response of the system and has strong anti-interference ability. The feasibility and superiority of this control method are verified by simulation research in Matlab/simulink. Secondly, according to the requirements of simulation and engineering application design parameters, the control system hardware and program of voltage source three-phase half-bridge PWM rectifier are designed. The hardware design mainly introduces the mathematical calculation of each device in the main circuit. Type selection and the design of each circuit module. The program design mainly introduces the main program, system subroutine and control strategy subroutine of the system, and then introduces the system debugging and rectifier physical platform, in which the system debugging gives the experimental waveform and corresponding conclusions. Finally, the physical platform of rectifier system and the debugging operation of the system are introduced. The waveform of system debugging experiment and the corresponding conclusions are given. The veracity and superiority of the control method of voltage source three-phase half-bridge PWM rectifier are verified.
【学位授予单位】：湘潭大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM461
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