Abstract:

Effectiveness of active filter rely on the availability of a reference signal which reflects the armonic component to be compensated for. As a result, a key issue in the study of active ilter is to develop a good current etection algorithm. In view of this, we analyze the working principle and system structure of active power filter, propose a ew current detection algorithm using neural networks, and design a parallel three-hase active power filter. In the omputer simulation, the total harmonic distortion (THD) is low. The results are in agreement with the theoretical analysis,and therefore confirm validity and feasibility of the new algorithm.

Key words: active power filter (APF); artifical neutral networks (ANN); total harmonic distortion (THD)