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Comparison and Evaluation of Power Factor Correction Topologies for…
Comparison and Evaluation of Power Factor Correction
Topologies for Industrial Applications
ABSTRACT :
Keywords:Power Factor Correction; Industrial Load; Converter; Thermal Design; Mass/Volume Analysis
Power factor correction is often mandatory from the power companies, usually
by charging the reactive power that the company consumes
Power factor correction is a major issue for all industries, since a typical industrial load is causing current delays, as
well as higher order current harmonics.
Power factor correction is often mandatory from the power companies, usually
by charging the reactive power that the company consumes.
Active filter
Capacitor Mid-Point active filter
Parallel active filter
Four-pole four-wire parallel active filter
Series active filters
INTRODUCTION
Most Industrial unit contains a large number of nonunity power factor loads and produce higher order harmonic currents.
Motor drives
Ballast lighting
Power Factor Correction (PFC)
Reduce the impact of these loads to the grid
Install reactive power compensators
Topologies
Efficiency
Power density (kg/kW)
Cost (RM/kW)
TOPOLOGY UNDER EVALUATION
Fundamental of Harmonic
The Power Factor of a Load
BOOST TOPOLOGIES FOR PFC OPERATION
PFC Rectifiers with Series Dual Boost Topology
PFC Rectifiers with Parallel Dual Boost Topology
Half controlled boost PFC rectifier.
Single switch boost PFC rectifier.
Buck PFC Topologies for Cascade Connection
Schemes
Fully controlled buck rectifier.
Single switch buck rectifier.
Parallel Connection Scheme
Cascade connection scheme
Vector or Direct power controlled PFC rectifiers
Buck-boost rectifiers.
Mass Analysis Procedure:
The main parameters that determine mass/volume figures
are the necessary cooling system and the passive elements
of each converter (filter capacitors and inductors).
Input current of a single switch boost rectifier unfiltered (lower case) and filtered (upper case)
Drain-source voltage, drain current and power dissipation for a Mosfet used on a buck rectifier
Input current of a buck rectifier unfiltered (lower case) and filtered (upper case)
Conclusions
A detailed study of power factor correction topologies
for industrial applications has been presented in this paper. However, the most prominent filter is parallel Active Filter
demonstrates the maximum P load power and the criteria used for the evaluation of the topologies were cost related. Additionally, this topology gives the flexibility to
manufacture a modular product that can be used in existing
industrial loads (parallel connection) and build up
simply by adding multiple modules (the only limitation is
an interconnection signal among the parallel modules in
order to share the load reactive power)
