三相四象限PWM可控整流器仿真平台设计詳解.doc

三相四象限整流器仿真平台设计 : 目前,传统二极管整流及相控整流因其结构简单,技术相对成熟,是目前中高档变频器中普遍采用的一种AC/DC变换形式。然而,随着绿色能源技术的快速发展,不可控整流引起电流畸变所产生的电磁干扰和谐波污染已经成为日益严重的问题,因此PWM整流器技术已成为电力电子技术研究的热点和亮点。PWM整流器可以实现网侧电流接近正弦波,功率因数近似为1并可实现四象限运行,其较快的动态响应,能量双向流动、直流母线电压可控制和抗负载扰动能力强等优点,使得节能和“绿色环保”高度的结合。 推导出基于开关函数的数学模型，并在此基础上通过坐标变换，建立其在两相静 止坐标系和两相旋转坐标系下的数学模型。简要阐述了PWM整流器的换流过程并 对系统主电路的参数选择进行了理论推导。 对比分析了直接电流矢量控制功率矢量控制定向控制直接电流控制策略基于的直接功率控制， 本文在理论分析的基础上，利用MATLAB提供的电力电子工具箱，在Simulink仿真环境下建立了直接电流控制直接功率控制策略的 关键词：PWM整流器 直接电流控制功率控制控制 Design of Three-phase Four-quadrant PWM Controlled Rectifier Simulation Platform Abstract: Currently, the traditional diode rectifier and its phase controlled rectifier is currently widely used in high-end inverter an AC /DC conversion form because its structure is simple and technology is relatively mature. However, with the rapid development of green energy technologies, the electromagnetic interference and harmonic pollution caused by the uncontrollable rectifier current distortion has become an increasingly serious problem, so PWM rectifier technology has become a hot research and highlights of power electronics. PWM rectifier can achieve nearly sinusoidal line current, power factor close to 1 and can achieve four-quadrant operation, and its fast dynamic response, two-way flow of energy, the DC bus voltage controllable and anti-load disturbance ability, etc., making the energy saving and green highly combined. This paper describes the working principle of a three-phase voltage-type PWM rectifier. The mathematical model based on switching function under three-phase stationary coordinate system is derived. And on this basis by the coordinate transformation establish its mathematical model under two-phase static coordinate system and two-phase rotating coordinate system. The commutation process of PWM rectifier is briefly described and main circuit parameters of the system was studied theoretically. It comparatively analyze the direct current vector control and direct power vector control technology.