2010•Proceedings of the Chinese Society of Universities for Electric Power System and its AutomationRequires access

Application of Active Power Filter to Improve Power Quality

Ying Zhang

Abstract

The main reasons of power quality problems in power system are the general application of electronic devices and the load reactive power and voltage fluctuation caused by excessive demand.In this paper,active power filter(APF) which can mitigate harmonic currents and compensate reactive power simultaneously was applied to improve power quality.The Ip-Iq current detection method was adopted to detect harmonics.Using hysteresis current control,shunt active power filter was chosen for its flexible operation and simple protection equipments.Simulation results with MATLAB/SIMULINK show the effectiveness of APF.

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Key concepts: AC power, Harmonics, Active filter, Power factor, Switched-mode power supply, Voltage optimisation, Volt-ampere, Electronic engineering