Hardware Design Of Active Power Filter Based On The Full Digital Controlled

Passive filters and active power filters (APF) are the two primary approaches foreliminating harmonics. comparing with the traditional passive filter. APF has obtained moreattention with the superexcellent performance, and with the fast development of digital signalprocessing technology, the full digital controlled APF will become a new research focus in thepowerelectronicsfield.This paper has studied the fact problem of the harmonic in power system. elucidated thebackground and purpose of the research and general situation of domestic and foreign researchof harmonic elimination technique in power system, which are given in the paper, principles andstructures of Active Power Filters are analyzed and compared. on the basis of instantaneousreactive power, detecting methods diversified schemes for harmonic based on the theory ofinstantaneous reactive power are discussed and the characteristics of all types are put forward,then choose ip-iq operation mode; on the basis of these projects, designed the hardware andsoftware of Active Power Filter, and explained particular for parts of hardware, the diagrams aregiven together, the flowcharts of software are given too. and then the designed project issimulated in SIMULINK environment of MATLAB software, the method of detecting harmonicand compensatory harmonic is tested, and the implementation of the major models is alsojustified, the results of the simulation has proved that the designed Active Power Filter isaccurate and applicability. through the simulation, parameters of device needed in the paper ismodified.On the base of theoretical analysis and simulated research, the shunt active power filterbased on TMS320F2812 DSP has been designed, and the initial research on the shunt activepowerfilterhasbeendonetoo.Experimental results demonstrate that the ip-iq method based on instantaneous reactivetheory can both detect the harmonic current of nonlinear load, and obtain the reactive currentrapidly.TheexperimentalresultalsoindicatedthatthiskindofAPFbasedontheTMS320F2812DSPhasthegoodcompensating-characteristics.