31-07-2012, 11:59 AM
A Systematic Approach to Synthesizing Multi-Input DC
A Systematic Approach to Synthesizing.pdf (Size: 388.88 KB / Downloads: 200)
INTRODUCTION
Conventionally, a pulse-width modulation (PWM) converter
is usually used to draw power from a renewable energy
source. In order to combine more than one renewable energy
sources to get the regulated output voltage, different circuit
topologies of multi-input converters (MICs) have been proposed
in recent years [1]-[17]. Different dc sources can be put
in series to implement the MIC and the regulated output voltage
can be achieved [1]-[3]. Such an MIC can continue to
operate even if one of the dc sources has failed. Another approach
is to put dc sources in parallel without electrical isolation
or with electrical isolation by using the coupled transformer
[4]-[10]. Control schemes for those MICs with paralleled
dc sources are based on the time-sharing concept because
of the clamped voltage.
BRIEF REVIEW OF BASIC PWM CONVERTER TOPOLOGIES
The six basic PWM converters, which include buck, boost,
buck-boost,