A shunt active filter based on voltage detection for harmonic termination of a radial power distribution line

Abstract

Abstract-This paper is focused on a shunt active filter based on detection of harmonic voltages at the point of installation. The objective of the active filter is to attenuate harmonic propagation resulting from series/parallel resonance between capacitors for power factor correction and line inductors in a power distribution line. The active filter acts as a low resistor to the external circuit for harmonic frequencies, and it is installed on the end bus of the power distribution line, just like a 50-terminator installed on the end terminal of a signal transmission line. Therefore, the function of the active filter is referred to as "harmonic termination" in this paper. Experimental results obtained from a laboratory system rated at 200 V and 20 kW verify that the active filter for the purpose of harmonic termination has the capability of harmonic damping throughout the power distribution line.

Harmonic resonances in Wind Power Plants: Modeling, analysis and active mitigation methods

“…Shunt active filters for damping harmonic propagation has been successfully addressed at industrial level [39]. The parallel connected converter acts as a resistor (at selected harmonic frequencies inside the current controller bandwidth), so it damps the series resonances [39].…”

“…The parallel connected converter acts as a resistor (at selected harmonic frequencies inside the current controller bandwidth), so it damps the series resonances [39]. This is achieved by the following control action…”

A new scheme for power factor correction and active filtering for six-pulse converters loads

“…Unlike passive filters, active power filters have a tendency to destabilize at higher harmonic frequencies due to a broad bandwidth requirement of current control loop for shunt APF or voltage control loop for series APF, as discussed in Reference [5]. Moreover, it is shown in References [7,8] that the shunt active filter is prone to instability when LC passive filters or power-factor correction (PFC) capacitor banks are connected on the loadside (downstream) from the point where the APF is connected. Similarly, dual stability characteristics also exist for series APF.…”

Power quality improvement and reactive power compensationusing enhancedsliding mode controllerbased shunt active power filter and static VAR compensator

“…There is necessary in distributing the energy to all levels with improved power quality. Power quality may affect by voltage sag [3], power factor [4], harmonic current and reactive power. These parameters degrade the performance and power quality of the power system.…”