Using Parallel Active Power Filter Based on Voltage Detection on a Radial Distribution Feeder with the Aim of Reducing the Harmonic Propagation and Whack-a-Mole Phenomena
Subject Areas : Active filter
Hamid Reza Ezati
1
(MSc/Tarbiat Modares University of Tehran)
Ali Yazdian Varjani
2
(MSc/Tarbiat Modares University of Tehran)
Keywords: Harmonic propagation, Harmonic oscillation, Characteristic impedance, Active power filter gain,
Abstract :
In order to damping of harmonic propagation phenomenon, active power filters are installed on distribution networks. Active power filter installed on buses may cause harmonic oscillation phenomenon and whack-a-mole. In this paper, a parallel active power filter that works based on voltage detection and applies with the goal of effective reducing and compensation of harmonic propagation and oscillation has been studied. In this paper two case studies consisting of harmonic current and voltage source connections to radial network has been studied. In this paper using simulation results for a ten-buses radial power distribution feeder in different states of nonlinear load connection - harmonic voltage or current source - by selecting fixed gain that is proportional to the inverse of Characteristic impedance these two phenomena effectively reduced. Due to the variable nature of the characteristic impedance of the power distribution feeder automatic adjusting of active power filter gain will be required regardless of the system conditions.Harmonic destructive currenthas been isolated with voltage detection method using of automatically adjusting of active power filter gain and compensation current is produced in order to control of this gain with the aim of total harmonic distortion decreasing and standardizing. By injection of this compensation current can prevent harmonic propagation and whack-a-mole. Because this method of extracting harmonic current is based on voltage and total harmonic distortion control is known voltage detection method.
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