电流型逆变电源控制方法的研究

发布时间：2019-01-17 19:04

【摘要】：脉宽调制(Pulse-Width Modulation)逆变电源的控制方法是现在电力电子技术的重要研究课题。随着电力电子技术的不断发展,电流控制电压型逆变电源(CC-PWM逆变电源)不仅要求逆变电源具有良好的可靠性,也要求具有优良的动态响应特性。在三相逆变电源脉宽调制中,滞环电流控制具有控制方式简单、易于硬件实现、工作可靠、无跟踪误差、动态响应快和鲁棒性好等优点,在工业领域中的应用广泛。本文研究了逆变电源的发展以及应用现状,具体分析了电压源电流型逆变电源的控制方法和研究进展,详细分析了电压源电流型逆变电源的原理、拓扑结构和数学模型,对于目前各种电流控制方法,进行讨论和对比分析。对传统电压源电流型逆变电源滞环控制进行分析,找出了传统滞环电流控制方法存在的问题,如开关频率不固定,开关频率高造成的开关损耗,影响开关器件的性能,电流误差大,系统的动态响应低等。为了解决传统滞环控制出现的问题,采用了 4种不同的滞环控制方法分别是基于空间矢量滞环电流控制方法、基于电流误差微分双滞环电流控制方法、不对称双滞环电流控制方法、时序双滞环电流控制方法,分别进行了原理分析,利用Matlab/Simulink对几种控制方法进行了相应的建模仿真之后,进行比较分析,仍然存在电流误差过大,三相开关次数不对称,使三相控制不对称,动态控制性能不够高等问题。因此,结合以上各种方法中的结果分析后,提出了两种改进型三相电压源电流型逆变电源的控制方法,为改进型空间矢量双滞环电流控制方法和改进型三态控制滞环电流控制方法,对两种方法进行了原理分析。在Matlab/Simulink平台上,对两种改进型双滞环电流控制方法进行建模和仿真分析,验证了本系统采用的电流控制方法,降低了开关频率,减小了电流误差,提高了系统的动态响应性能。
[Abstract]:The control method of pulse width modulation (Pulse-Width Modulation) inverter is an important research topic in power electronics technology. With the development of power electronics technology, current controlled voltage type inverter (CC-PWM inverter) not only requires good reliability of inverter, but also requires excellent dynamic response characteristics. In the pulse width modulation of three-phase inverter power supply, hysteresis current control has the advantages of simple control mode, easy hardware implementation, reliable operation, no tracking error, fast dynamic response and good robustness. It is widely used in industrial field. In this paper, the development and application of the inverter power supply are studied, the control methods and research progress of the voltage source current type inverter are analyzed, and the principle, topology and mathematical model of the voltage source current type inverter are analyzed in detail. The current control methods are discussed and compared. This paper analyzes the hysteresis control of traditional voltage source and current inverter power supply, and finds out the problems existing in the traditional hysteresis current control method, such as the switching frequency is not fixed, the switching loss caused by the high switching frequency is high, and the performance of the switch device is affected. The current error is large and the dynamic response of the system is low. In order to solve the problem of traditional hysteresis control, four different hysteresis control methods are adopted, which are based on space vector hysteresis current control method and current error differential double hysteresis current control method. The principle of asymmetrical double hysteresis current control method and sequential double hysteresis current control method are analyzed respectively. Several control methods are modeled and simulated by Matlab/Simulink. There are still some problems such as too large current error, asymmetrical number of three-phase switches, asymmetry of three-phase control and insufficient performance of dynamic control. Therefore, based on the analysis of the results of the above methods, two improved control methods of three-phase voltage-source current-type inverter are proposed. In order to improve the space vector double hysteresis current control method and the improved three state control hysteresis current control method, the principle of the two methods is analyzed. On the Matlab/Simulink platform, two improved double hysteresis current control methods are modeled and simulated. The results show that the current control method adopted in this system can reduce the switching frequency and current error. The dynamic response performance of the system is improved.
【学位授予单位】：天津工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM464

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