Active Power Current Detection And Realization Based On Fryze Power Definition

With the development abroad application of the electric power electron equipments, the harmonics pollution in the electric power net is more serious day by day. All kinds of methods based on the active filter to restrain the harmonics and to compensate the reactive power emerge in endlessly. Active filter having real-time and veracity, taking advantage of the virtue of the signal processing and controlling technology, not only optimize the function of the active filter but improve the performance of the active.The thesis starts with the Fryze time-domain power definition, discusses the time-domain power theory applied to the single-phase and three-phase circuits. Then it decomposes the generalized reactive current. Recommend the FBD power theory system based on the Fryze time-domain power theory.The thesis puts forward an active current detection based on the mean filter. The filter is a finite impulse response (FIR) digital filter. It makes that the control system can follow the power system after three-one period in three-phase system, one period in single-phase system. To advance the dynamic response ulteriorly, the thesis takes the output as the feedback. The result is that the dynamic response is shorten to two third of the period.At last, the correctness and validity of these proposed measurement approaches put forward by the thesis are clearly shown by the simulation studies and the experiments.