Speeding-up dynamic response of active power conditioners

The i/sub d/-i/sub q/ control method is one of the most widespread control methods for active power filters. Two improvements to this method are presented: the elimination of the PLL (phase locked loop) in active power filters for harmonic current compensation only and a strategy for achieving the best transient time. PLL elimination is an important simplification for reducing the computational effort in a digital implementation as well as for improving transient time. The achievement of the best transient time is essential for an efficient compensation of currents with time-varying harmonic content. The paper describes both improvements and presents simulations and experimental results.

[1]  V. Blasko,et al.  Operation of a phase locked loop system under distorted utility conditions , 1997 .

[2]  Gil D. Marques,et al.  An instantaneous active and reactive current component method for active filters , 2000 .

[3]  Subhashish Bhattacharya,et al.  Synchronous frame based controller implementation for a hybrid series active filter system , 1995, IAS '95. Conference Record of the 1995 IEEE Industry Applications Conference Thirtieth IAS Annual Meeting.

[4]  L.E.B. da Silva,et al.  Improving the dynamic response of active power filters based on the synchronous reference frame method , 2002, APEC. Seventeenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.02CH37335).