The Design And Realization Of Shunt Active Power Filter Based On DSP

The rapid development of power electronics technology, on one hand, made power energy transformation and application conveniently, and on the other hand, led to the serious power quality problems in the power system, such as harmonic currents pollution, reactive power issue, voltage fluctuation or unbalance. APF(Active Power Filter) has been a key project in power effective method to solve harmonic and electronics application technology, as the most reactive power currents pollution, and the power quality. But APF has not reached the mature stage in the domestic applications, and has many problems to more study and improve. Compared with passive filter, APF still stays in less important position in actual application. For this purpose, in this thesis, the detecting, control and realization technologies are studied deeply, the research on which is of great importance to the early industrialization application of APF. Thorough research has been carried out for 50kVA parallel APF’s main circuit and its peripheral circuit. The Choice of main circuit switching components, and the design of snubber circuit and drive protection circuit are discussed detailedly; the selecting method of DC bus voltage value, DC bus capacitance and AC side filtering inductance value are given, using the method of integration of theoretical analysis with simulated experiment. And, the detailed design parameters of concrete main circuit components and peripheral components for 50kVA parallel APF are calculated according to above-mentioned analysis method.In this thesis, the design of the control system of the APF is also discussed. The realization scheme of full digital control system based on DSP(digital signal processor)+ARM(Advanced RISC Machine) has been discussed ,and the hardware circuit and software design of control system have been studied.Finally the experiment system is set up and representative experiments have been carried out on 50kVA parallel APF model machine, and the experiment data and waves have verified the research work in this thesis.