Design And Research On Shunt Active Power Filter

In recent years, with the widely application of the power electronic devices, such as electric arc furnace, converter, and a large number of harmonic currents and impact reactive power into power, voltage and current in the waveform distortion, the serious influence power supply system of power quality. Therefore, the management of electric harmonic current research hot spot, become active power filter can dynamically restrain harmonics and compensating reactive power, is recognized as the electric system harmonic problem is one of the most effective methods.Based on parallel active power filter for research object, a systematic analysis on parallel active power filter based on the basic principle of parallel, the realization of active power filter circuit and control strategy are analyzed and studied. Focus on the harmonic and reactive current detection and extraction method, a deep research on the instantaneous reactive power theory based on the method of harmonic detection; Based on the voltage space vector control strategy, hysteresis current using current error vector and reference voltage vector space distribution are the best space voltage vector switching scheme, the current control error in a given hysteresis width within; For DC voltage using fuzzy control and PI control using the control method.Based on parallel active power filter 100kVA should apply for example, design based on DSP + CPLD of digital controller, and explains in detail the controller, the structure and function of each part. In MATLAB/SIMULINK to shunt active power filter on the simulation analysis, the simulation results show that the active power filter harmonic control of power and compensation has good effect.