Power Research Of Shunt Active Power Filter

With the deepening of the process of industrialization, Power electronic devices havebeen increasingly widely used. At the same time, harmonic problem also has highlightedincreasingly come out. Active power filter, as a powerful weapon to solve the problems ofharmonic pollution, has been widely and deeply studied in the whole world.In this thesis, three-phase three-wire shunt active power filter is the object of study.After the introduction of shunt active power filter based on the principle, this thesisintroduces mathematical model in the DQ coordinate. At the same time, this thesis also putforward the inductance in AC side, DC bus capacitor and LCL filter design method. Incontrast to the commonly used harmonic detection algorithm, this thesis analysis theharmonic current detection algorithm based on the improved instantaneous reactive powertheory in detail. And for core low-pass filter in the algorithm, this thesis designs thesecond-order Butterworth low-pass filter in contrast to a variety of commonly used filter.In order to facilitate verification circuit design is correct and the feasibility of thealgorithm, the test platform is built based on the saber simulation software. Experiments inhigh frequency filtering, harmonic detection and harmonic compensation verify the systemdesign topology, the main circuit parameters and the high-frequency filter circuit. Finally,on the basis of theoretical studies and simulation, this thesis developed a three-phasethree-wire shunt active power filter experimental prototype. The non-control rectificationexperiment, controlled rectifier experiment and harmonic compensation experiment verifythat the design of the active power filter compensation effect is ideal.