A novel digital hysteresis current controller for an active power filter

An active power filter is used to eliminate current harmonics produced by nonlinear loads. This paper discusses a novel method of controlling a power inverter used to inject compensating currents into the power system. A digital signal processor performs the harmonic isolation and generates a digital reference current. A hysteresis current controller has been implemented in a field programmable gate array and generates the switching signals from this reference. This reduces the analogue circuitry and enhances the system's immunity to noise. This paper presents the results and discusses the performance of a small scale inverter under completely digital control.

[1]  A. Zuccato,et al.  Digital adaptive hysteresis current control with clocked commutations and wide operating range , 1994 .

[2]  Richard Duke,et al.  Real-time optimization of an active filter's performance , 1994, IEEE Trans. Ind. Electron..

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

[4]  H. Sasaki,et al.  A New Method to Eliminate AC Harmonic Currents by Magnetic Flux Compensation-Considerations on Basic Design , 1971 .

[5]  X. Jorda,et al.  Use of ASICs in PWM techniques for power converters , 1993, Proceedings of IECON '93 - 19th Annual Conference of IEEE Industrial Electronics.

[6]  Donald W. Novotny,et al.  Current Control of VSI-PWM Inverters , 1985, IEEE Transactions on Industry Applications.

[7]  Hirofumi Akagi,et al.  New trends in active filters for power conditioning , 1996 .

[8]  Dong-Seok Hyun,et al.  A novel PWM scheme for a three-level voltage source inverter with GTO thyristors , 1994, Proceedings of 1994 IEEE Industry Applications Society Annual Meeting.

[9]  G. Joos,et al.  Control of active filters using digital signal processors , 1995, Proceedings of IECON '95 - 21st Annual Conference on IEEE Industrial Electronics.