This paper introduces an efficient control approach to enhance harmonics mitigation performance of the shunt active power filter (SAPF). This approach is based on adaptive filters favored by their built-in automatic parameters adaptation capability. The proposed filter, which uses a variable leaky least mean square (VLLMS) adaptation, is applied with a modified instantaneous power PQ theory. This enhances its dynamic performance over the use of conventional time-invariant filters, and overcomes its limitations in the presence of nonsinusoidal voltage conditions. The studied SAPF model is simulated in MATLAB/SIMULINK with combinations of nonlinear and unbalanced loads. Simulation results indicate a significant improvement in the transient response to less than a quarter of a cycle in its worst case, on top of additional improvements in the steady-state THD value. Moreover, the algorithm?s computation efficiency evaluated in an embedded hardware prototype has given a fast execution time of 1.4µs.
Shunt active power filter, instantaneous power theory, harmonics, adaptive filters
ZOGHBI, ABDERREZZAQ and BERKANI, DAOUD
"Performance improvement of the shunt active power filter using a novel adaptivefiltering approach,"
Turkish Journal of Electrical Engineering and Computer Sciences: Vol. 29:
1, Article 14.
Available at: https://journals.tubitak.gov.tr/elektrik/vol29/iss1/14