2019
DOI: 10.1049/iet-pel.2018.5452
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Reliability and energy sharing analysis of a fault‐tolerant multilevel inverter topology

Abstract: Photovoltaic (PV) systems, especially which are installed in the remote areas, stand in need for a highly reliable system. A high failure rate of the semiconductor switches and capacitors yields a very low reliability of the inverters used in the PV system. Conventional two-level inverters are replaced by multilevel inverters (MLIs) to effectively improve the output quality waveform. However, MLIs incorporate a high device count in their architecture which further impairs the reliability of the PV system. Rece… Show more

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Cited by 12 publications
(13 citation statements)
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References 21 publications
(47 reference statements)
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“…Such voltage boosting can be done either by cascading PV modules, 22 front end dc-dc boost converter, 23 or using a step-up transformer at the back-end of the inverter (i.e., on ac sides). 36 However, dc-dc converter and transformer applications increase switching components, volume, weight, power losses, and cost. Moreover, cascading PV modules increases the possibility of many mismatch issues.…”
Section: Possible Applications Of Mlismentioning
confidence: 99%
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“…Such voltage boosting can be done either by cascading PV modules, 22 front end dc-dc boost converter, 23 or using a step-up transformer at the back-end of the inverter (i.e., on ac sides). 36 However, dc-dc converter and transformer applications increase switching components, volume, weight, power losses, and cost. Moreover, cascading PV modules increases the possibility of many mismatch issues.…”
Section: Possible Applications Of Mlismentioning
confidence: 99%
“…The chance that a device or component will perform the desired operations within a particular time interval (t) is referred to as the converter's reliability (denoted by R(t)). 36 Between 0 and 1, the reliability value is set. Assessment of reliability is crucial in switched-capacitor devices with a greater number of switches and capacitors.…”
Section: Reliability Analysismentioning
confidence: 99%
“…All the parameters required for the evaluation of conduction and switching losses are directly taken from the switch datasheet. The equations for the power loss analysis for the proposed topology under healthy and faulty condition are taken from [24] and are described as below:…”
Section: Need For Redesigning the Redundant Leg In [18]mentioning
confidence: 99%
“…All the parameters required for the evaluation of conduction and switching losses are directly taken from the switch datasheet. The equations for the power loss analysis for the proposed topology under healthy and faulty condition are taken from [24] and are described as below: right leftthickmathspace.5emPloss=PCon+PSwitPCon,normalS=VTIDS,avg+rds,onIDS,RMS2PCon,normalD=VDOInormald,avg+rdInormald,RMS2PSwit=PSwit_Off+PSwit_OnPSwit_Off=VBiDS_offtofffsw/6PSwit_On=VBiDS_ontonfsw/6 Here, P loss is the total power losses, P Con the conduction power losses, P Swit the switching power losses, P Con,S the conduction power losses across the switch, P Con,D the conduction power losses across the anti‐parallel diode, V T the threshold voltage of the switch, I DS,avg the average value of the drain to source current, I DS,RMS the RMS value of the drain to source current, r ds,on the on state resistance of the drain to source, V DO the threshold voltage of the diode, I d,avg the average value of the diode current, I d,RMS the RMS value of the diode current, r d the resistance of the diode, P Swit_Off the switching losses across the switch during the turn off instant, P Swit_On the switching losses across the switch during the turn on instant, V B the blocking voltage across the switch, i DS_off the instantaneous value of drain to source current during the turn‐off instants, i DS_on the instantaneous value of drain to source current during the turn‐on instants, t off the turn off delay of the switch, t on the turn on delay of the switch and f sw the switching frequency of the modulation scheme.…”
Section: Need For Redesigning the Redundant Leg In [18]mentioning
confidence: 99%
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