Study On Shunt Active Power Filter Based On Space Vector PWM

With the rapid development of modern electronic technology, the harm of harmonic become increasingly serious in power system, so the active power filter(APF) in order to restrain harmonics has been ermeged. It can give the real-time compensation of harmonic with the variational frequency and amplitude, so it received extensive attention. The APF for harmonic suppression has become one of the major power electronic technology research content in the power system.First in this thesis, the domestic and overseas development and classification of APF are summarized, working principle of shunt APF are described. Improving ip-iq based on instantaneous reactive power theory and space vector PWM are used by compring methods for detecting the harmonic and control technique. Secondly, using Matlab/Simulink of the power system simulation obout the hamonic detection method and control method of APF for modeling and simulation, and then can verify the methods'correctness. Based On the success of simulation, taking TMS320F2812 as control core of shunt APF's system device for hardware and software design, introduce the structure and function of every part in detail. Finally, taking part of the harmonic current detection experimental research.Matlab simulation redults show us that at the situation of symmetric and asymmetric load of three-phase, the mutation of the current, SVPWM control method has the dynamic tracking compensation characteristic. Experimental results show that the design based on DSP improvement ip-iq harmonic current detection system hardware and software, not only achieve reasonable effectiveness of real-time current harmonic accurate detection but also effectively detect harmonic at early time of system operating, and in the operating system can effectively early detection of APF harmonic, This study provides a theoretical basis and experimental data for engineering application of APF.