18-07-2012, 01:18 PM
Design of Active Power Filter for Low Voltage andHigh Current Switching Power Supply
Design of Active Power Filter for Low Voltage1.pptx (Size: 97.44 KB / Downloads: 36)
Introduction
The increasing use of power electronic equipments in a distribution network which represent nonlinear loads have caused many power quality disturbances such as harmonics pollution, unbalanced load currents, and reactive power problems.
As a result poor power factor, weakening efficiency, over heating of motors and transformers, malfunction of sensitive devices etc. [1]-[4] are encountered.
Problem definition AND Literature review
Conventionally, a passive power filter which consists of passive elements is used to provide harmonic filtering as an economical and effective filtering device.
However it has shortcomings such as fixed compensation performance, bulk in size and resonance troubles [5]-[9].
Proposal In this project
With the development of power electronic technology, low voltage and high current switching power supply has been applied widely in production and life.
Generally, there are two methods to eliminate harmonics, which are mainly passive power filter and active power filter. The former is relatively low cost, but filtering effect is far from desirability.
This paper employs active power filter to suppress harmonic current of low voltage and high current(60V/500A) switching power supply.