Adaptive notch filter under indirect and direct current controls for active power filter

This study presents the implementation of adaptive notch filter (ANF) as
reference signal extraction for shunt active power filter (APF) in indirect
current control (ICC) and direct current control (DCC) modes for three phase
system. The ANF functions to filter the signal that inputted to it by producing
a fundamental signal and harmonics signal. The advantage of applying
the ANF algorithm is based on its simple design that giving the ANF
advantages to be utilize in microcontroller. The performance of the ANF
is validated though MATLAB simulation in ICC dan DCC configurations.
Based on the simulation results, the ANF is capable to work efficiently for
both ICC and DCC modes, but in term of efficiency, the ICC mode is clearly
showing a better harmonics mitigation result. Base on the result also it shown
that the ANF is capable of mitigate the harmonics below the standard
required by the IEEE 519-92. The application of ANF is useful to be applied
due to its simple design and filtering method.