Implementation of a digital signal processor-controlled shunt active filter

This paper presents the implementation of an active filter configuration for harmonic compensation. The system can be controlled for current harmonics and reactive power compensations simultaneously by using a converter operating as active shunt filter. A synchronous reference frame based controller is compared to an instantaneous reactive power based controller. The synchronous reference frame method is chosen to control the converter due to the better performance when the supply voltage is distorted. A shunt active filter system has been designed and built to meet IEEE 519 recommended harmonic standards. Simulation demonstrates the good performance of the active filter configuration. Experimental results, corresponding to the operation of the digital signal processor-controlled shunt active filter are also presented.