【摘要】 在电压型PWM整流器的控制中,广泛采用在同步旋转坐标系下的直接电流控制方法和双闭环控制结构。在这种控制方法中,由于有功电流和无功电流是分别进行控制的,只对每个变量单独进行了分析,没有对两个变量进行综合统筹的考虑,结果使电流不能快速地跟踪参考电流,没有达到更优的控制。该文艺界通过对影响电流动态响应速度的因素进行深入的分析,提出了利用动态过程中的无功电流来提高有功电流动态响应速度的一种新的控制方法。仿真结果表明,这种控制方法具有优良的稳态性能和快速的动态响应。由于实现简单,这种控制方法具有一定的实用价值。更多还原

【Abstract】 In the control of voltage source PWM rectifier, direct current control and dual close loop control structure in d-q synchronous reference frame are widely adopted. In this control method, the active and reactive current are separately controlled and synthetical consideration of two currents has been ignored; as a result, this scheme fails to track the reference current quickly and doesn’t obtain better control property. By analyzing the factors which influence the fast transient response, this paper puts forward a new control scheme to improve current transient response rate by utilizing the reactive current in transient state. Simulation results show that the proposed control scheme has satisfactory steady-state characteristics and fast transient response. This control scheme possesses some practical values due to its simple implement.更多还原