Research on shunt APF´s control system based on DSP and μC/OS-II

This paper describes the work of designing a fully-digital shunt active power filter control system based on digital signal processor TMS320F2812. The control algorithm for control system of shunt active power filter is realized by DSP which is the core processor of the embedded operating system μC/OS-II´s hardware platform, the i_p-i_q principle is presented for the harmonic current extracting and the reference current generation. The SVPWM control method is used to make the harmonic current command signal into a pulse width commands to control the inverter generate compensation current. A simulation study with the MATLAB on the system has been done, and experimental results show that the designed digital control system works well and all the investigated control algorithms are effective to compensate load harmonic currents.