Study On Active Power Filter With One-cycle Control Based On Dq Detection Arithmetic

The power equipment is growing popularity especially after the application ofpower electronic devices and the number of nonlinear load increase significantly inpower grid. The harmonic content is increased significantly because nonlinear loadsare used widely in power grid. And the problem of harmonic pollution is more andmore serious. At present, the active power filter is one of the most effective means toreduce harmonic pollution in power grid. It can compensate the change of frequencyand amplitude. In addition, the compensation effect is ideal.On the basis of reading a large number of domestic and foreign literatures, thispaper discusses in detail the research status and development of active power filterbetween domestic and foreign. The detection and control methods of active powerfilter are studied. Because dq detection arithmetic has the characteristics of goodreal-time and dynamic response of OCC is well. So that the active power filter withOCC is designed by basing on dq detection arithmetic. Therefore the parameters ofproject are theoretically analyzed and calculated. According to these parameterswhich are calculated theoretically, system model of active power filter is simulatedby using PSCAD/EMTDC software. The compensation performance of the activepower filter is simulated under the condition of the inductive load and impact load.And the waveforms of grid current and voltage are extracted and analyzed before andafter compensation. The feasibility of the design project is further validated. On thebasis of theoretical analysis and simulation results, the hardware circuit is designedfor active power filter with OCC. And the DSP program is completed. Finally theexperiment platform is set up based on dq detection arithmetic of active power filterwith OCC. The experimental results show that using active power filter with OCCcan effectively compensate for the harmonic component. Harmonic component arereduced markedly after compensating. Simulation and experimental results show that compensation performance of the design scheme is favorable. Power quality isimproved obviously so that the anticipated goal is completed.