A new single-phase active power filter with reduced energy storage capacitor

This paper presents an APF (active power filter) circuit which employs a new control method, using an integration and sampling technique, to simplify the calculation algorithm for the real fundamental component of load current. In addition, a new simple control scheme, based on the energy balance concept, is proposed to control the voltage of energy storage capacitor. Since the energy change in the energy storage capacitor can be compensated in the next cycle and larger DC bus voltage ripple can be tolerated by using the sampling technique, a relatively smaller energy storage capacitor is required. The advantages of this APF circuit are simplicity of control circuits, low cost (a smaller energy storage capacitor) and good transient response. In theory, the time delay for the compensation of reactive power and harmonic currents is zero. The feasibility of this theory is verified by using a PSPICE simulation and experimental results.<<ETX>>

[1]  Takeshi Furuhashi,et al.  A study on the theory of instantaneous reactive power , 1990 .

[2]  Hirofumi Akagi,et al.  Instantaneous Reactive Power Compensators Comprising Switching Devices without Energy Storage Components , 1984, IEEE Transactions on Industry Applications.

[3]  J. Dixon,et al.  A new current control strategy for active power filters using three PWM voltage source inverters , 1993, Proceedings of IEEE Power Electronics Specialist Conference - PESC '93.

[4]  Chang-Ming Liaw,et al.  Design and implementation of a single phase current-forced switching mode bilateral convertor , 1991 .

[5]  Phoivos D. Ziogas,et al.  An SMR Topology with Suppressed DC Link Components and Predictive Line Current Waveshaping , 1987, IEEE Transactions on Industry Applications.

[6]  Laszlo Gyugyi,et al.  Power electronics in electric utilities: static VAR compensators , 1988, Proc. IEEE.

[7]  T.-C. Chen,et al.  Modelling and design of a single phase AC to DC convertor , 1992 .

[8]  Ned Mohan,et al.  Adaptive tolerance-band current control of standby power supply provides load-current harmonic neutralization , 1992, PESC '92 Record. 23rd Annual IEEE Power Electronics Specialists Conference.

[9]  G.-H. Choe,et al.  A new injection method for AC harmonic elimination by active power filter , 1988 .

[10]  M. Takeda,et al.  Harmonic current and reactive power compensation with an active filter , 1988, PESC '88 Record., 19th Annual IEEE Power Electronics Specialists Conference.

[11]  S. D. Round,et al.  The steady-state performance of a controlled current active filter , 1993 .

[12]  Hurng-Liahng Jou,et al.  A new parallel processing UPS with the performance of harmonic suppression and reactive power compensation , 1994, Proceedings of 1994 Power Electronics Specialist Conference - PESC'94.

[13]  Phoivos D. Ziogas,et al.  A novel active current waveshaping technique for solid-state input power factor conditioners , 1991 .