Design of Shunt Active Power Filter(APF)

A power filter is a type of electronic filter which is placed between an external power line and electronic devices. It is used in order to attenuate conducted radio frequencies or electromagnetic interference between the AC or DC power line and the equipment. In this project, you are going to design and simulate an APF based on inter-leaved buck converter in the MATLAB/Simulink environment.

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In this project, an Active Power Filter (APF) is to be designed which will mitigate the effects of harmonics due to the use of non-linear loads. This is to be realized with help of interleaved buck converter which not only reduces the harmonics at the Point of common coupling (PCC) but also removes the probability of the occurrence of inherent shoot-through phenomena in the power electronics circuits.

Project Description:

1. Active Power filter: These are filters, which are used to perform the job of harmonic elimination. Harmonic in the Electrical system means that current and voltage are distorted and deviate from the sinusoidal waveform. The active power filters are used to filter out both higher and lower order harmonics in the power system.
2. Point of Common Coupling (PCC): The PCC is a point in an electrical system where multiple loads are connected.

Project Implementation:

1. At first study, some research works those have been accomplished by different researchers from different sources like IEEE Explorer digital library, science direct plus etc.

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1. Prepare a summary of all the research paper related to the subject, which is the outcome of the literature survey.
2. Study the operation of an interleaved buck converter which you will use in the realization of APF.
3. Then design a controller, which will create the switching signal for the PMOSFET used for the realization of interleaved buck converter through digital circuits.
4. Perform simulation of your design in MATLAB/Simulink and obtain THD (Total Harmonic Distortion). Compare your result with IEEE standard 519.
5. Then compare your result between the half bridge and full bridge based APF (THD) outputs which you can obtain by FTT (Fast Fourier Transform) analysis.

Project Brief: After successful completion of the project, your design will able to eliminate the ‘shoot through’ problem from the switch cell with significant improvement in reliability, efficiency and performance and also you can observe that there will be an improvement of the power quality issues at PCC.

Software requirements:

MATLAB: MATLAB is a multi-paradigm numerical computing environment and proprietary programming language developed by MathWorks. This software is handy in solving complex Matrixes.

Programming language: MATLAB programming Language

• MATLAB

• Active Power Filter

Design of Shunt Active Power Filter(APF)