Design and development of active power filter for harmonic reduction in electrical distribution system

Ghazali, Nor Syamimi Farhana (2016) Design and development of active power filter for harmonic reduction in electrical distribution system. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Owing to the loads from power consumers and power equipment manufacturer, electrical equipment application has been grow drastically. These matters become more serious because the effect from the electrical equipment can cause high non-linear load for example electric drills, computer, TVs, printer and electronic equipment like thyristor converter, inverter and etc. This semiconductor can contribute in producing harmonics these is because the above load can produce non-sinusoidal currents from supply and lead to voltage distortion [1]. The effect from the harmonics to distribution system is it can increase a wire failure, overheating of transformer, low power factor, blackout in power system and in neutral current conductor, there is an excessive neutral current. To overcome harmonic distortion, passive and active filter is use. But, passive filter can cause resonance problem thus can affect the stability of the power distribution system.As for active power filter, it can use to extract the harmonic content [3].For this project, two main objectives need to be achieved. First is to study the concept of active power filter (APF) for harmonic reduction in electrical distribution system and secondly, to model and develop active power filter configuration harmonic reduction. The distorted waveform in term of current and its controller based on PQ theory due to non-linear load in electrical distribution system will be monitored based on proposed circuit design with its controller using MATLAB/Simulink. The simulation results of currents and their THD at 11 source and load current will be discussed before and after compensation using active power filter (APF).

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