Open-Circuit Fault Diagnosis in Interleaved DC-DC Converters

Interleaved dc-dc converters have been widely applied, because of their benefits related to efficiency, size, thermal management, modularity, and output current ripple cancellation. These converters present an enhanced fault tolerance capability, but an open-circuit fault can leads to ripple beyond...

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Bibliographic Details
Published in:IEEE transactions on power electronics Vol. 29; no. 6; pp. 3091 - 3102
Main Authors: Ribeiro, Eunice, Cardoso, Antonio J. Marques, Boccaletti, C.
Format: Journal Article
Language:English
Published: New York, NY IEEE 01.06.2014
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Applied sciences
Buck converters
Cancellation
Circuit properties
Circuits
Converters
DC-DC converters
Derivatives
Design. Technologies. Operation analysis. Testing
Electric currents
Electric, optical and optoelectronic circuits
Electrical engineering. Electrical power engineering
Electrical equipment
Electronic circuits
Electronics
Exact sciences and technology
Fault diagnosis
Fault tolerance
Fault tolerant systems
Faults
Integrated circuits
Modularity
Phases
Ripples
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Sensors
Shape
Signal convertors
Switches
Testing, measurement, noise and reliability
Testing. Reliability. Quality control
Thermal management
Topology
Transient analysis
Performance evaluation
Open circuit
fault diagnosis
Electric energy transportation
Thermal management (packaging)
Measurement sensor
Thermal behavior
Direct current convertor
Direct current line
Photovoltaic system
Unbalanced conditions
Open fault
Fault tolerance
DC-DC converters
Direct current
Ripple
Time interval
Selector switch
Fault diagnostic
Power transmission line
Defect detection
ISSN:0885-8993, 1941-0107
Online Access:Get full text
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Description
Summary:Interleaved dc-dc converters have been widely applied, because of their benefits related to efficiency, size, thermal management, modularity, and output current ripple cancellation. These converters present an enhanced fault tolerance capability, but an open-circuit fault can leads to ripple beyond load requirements. This paper presents a fault-diagnostic method for interleaved dc-dc converters using only the dc-link current derivative sign features. The dc-link current derivative is thoroughly studied for both healthy and faulty modes. Its sign variation during different time intervals defined by the number of switches in conduction mode contains important information for open-circuit fault detection. The presented method is robust to transients and current imbalance between phases and no additional sensors are required. A photovoltaic system application is presented to validate this method.
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ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2013.2272381