Single-phase power active filter and compensator using instantaneous reactive power method

The paper deals with the new method of analysis, synthesis and experimentation of single-phase power active filters. Using a new particular transformation theory the ordinary single-phase system can be transformed into equivalent two-axes orthogonal one. The new original thought is based on the idea that ordinary single-phase quantity can be complemented by fictitious second phase, so that both of them will create orthogonal system, as is usual in three-phase systems. Application of above theory makes possible to use complex methods of analysis as instantaneous reactive power method, which have not been usable for single-phase systems so far. Both, the active and reactive powers can be determined by this way. Practical application of the method is outlined for the case of reference current determination for single-phase power active filter. The paper shows some examples of the simulation verification results, which proved a high accuracy and extremely fast response of the single-phase active filter with control, based on the introduced method. The effectiveness of proposed control algorithm is also demonstrated by experimental results, which were carried out on the single-phase active parallel filter.