DSP-Based Digital Control of a Single-Phase Shunt Active Power Filter under Distorted Voltage Source

This paper deals with design and implementation issues of a DSP-based single-phase shunt active power filter under distorted voltage source. Some details about the digital controller using a DSP, based on a direct current method, including the hardware synchronous, software design and softstartup are presented. The designed shunt active filter with its current controller has been tested under a highly distorted voltage at the PCC with a 1-kV/40-V experimental prototype based on DSP TMS320LF2407A. Hardware results verify the feasibility and effectiveness of designed active filter and its capability in meeting the IEEE 519-1992 recommended harmonic standard limits.