You Xiaojie

A shunt active power filter using dead-beat current control

The conventional control method of active power filter is based on the instantaneous reactive power theory. But the performance of this method is affected by the distortion of source voltage. To overcome the problem, this paper presents a novel control method based on dead-beat current control with fixed switching frequency. The results of both simulations and experiments are presented.

Predictive current control of three-phase PWM rectifier under the condition of non-ideal source voltage

This paper presents the predictive current control of three-phase PWM rectifier under the condition of unsymmetrical and non-sinusoidal source voltage. Two parts are included: one is the determination of input current reference and the other is the calculation of the duty cycle of the switching device. The determination of the input current reference is base on the rotating coordinate transformation of the three-phase source voltage. The resulting current reference is in phase with the fundamental positive-sequence component of the source voltage. The duty cycle of the switching device is calculated directly so that the rectifier input current can track its reference over one switching period. The simulation and experimental results validated the effectiveness of the proposed control approach.

A new synchronous frame current reference generation for hybrid active filter and system stability analysis

In this paper, the authors present a new synchronous frame current reference generation method for hybrid active power filter (HAPF), which can extract both harmonic and reactive current contained in the nonlinear load under the condition of unsymmetrical and non-sinusoidal source voltages. Furthermore, this method can extract selective order of harmonics, which enables the active filter to detect and compensate the lower order of harmonics while the passive counterpart compensates the residual harmonics. The stability of the system is also studied. Finally simulation and experimental results are presented to verify the effectiveness of the proposed method.