EVALUATION OF RESIDUAL NETWORK DISTORTION DURING COMPENSATION ACCORDING TO THE INSTANTANEOUS POWER THEORY

A theoretical evaluation is done an a three-phase three-wire system to show the unwanted network influence when a dynamic filter is controll ed according to the ''instantaneous power theory''. The evaluation is also simulated on Mathcad for various network configurations and compa red to known experiments. The quantities with unwanted frequencies int roduced by the compensation increase with the complexity of the system s. It is concluded that the use of this power theory for control of dy namic filters is less desirable. Two examples of rectifier systems are also given to show that the results with compensation by the ''instan taneous power theory'' can in some systems be worse than in others, si nce its effectiveness is load-type dependent.