Abstract
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.
Highlights
The needs of power quality compensation in electrical power system is becoming more and more crucial nowadays as the increase of the development in power electronics equipment
Mitigation or suppressing the harmonics has been suggested within these recent years as the research works in active power filter (APF) have been progressing
This paper proposes application of adaptive notch filter (ANF) based on the IIR filter as an extraction method of harmonics for indirect current control (ICC) and direct current control (DCC) of APF
Summary
The needs of power quality compensation in electrical power system is becoming more and more crucial nowadays as the increase of the development in power electronics equipment. In developing an APF, one of most important components is the harmonics extraction algorithm. In developing the extraction algorithm, many methods have been studied and applied whether in time or frequency based domains. This paper proposes application of ANF based on the IIR filter as an extraction method of harmonics for indirect current control (ICC) and direct current control (DCC) of APF. By applying the ANF, the filter is capable of tracking the frequency and phase of the system without additional component such as phase lock loop (PLL). Another advantage of applying the ANF is its capability to filter out the fundamental component and selective components of harmonics of the electrical power system
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