NDLI: Photovoltaic Systems Reliability Improvement by Real-Time FPGA-Based Switch Failure Diagnosis and Fault-Tolerant DC

Content Provider	IEEE Xplore Digital Library
Author	Jamshidpour, E. Poure, P. Saadate, S.
Copyright Year	1982
Abstract	The increased penetration of photovoltaic (PV) systems in different applications with critical loads such as in medical applications, industrial control systems, and telecommunications has highlighted pressing needs to address reliability and service continuity. Recently, distributed maximum power point tracking architectures, based on dc-dc converters, are being used increasingly in PV systems. Nevertheless, dc-dc converters are one of the important failure sources in a PV system. Since the semiconductor switches are one of the most critical elements in these converters, a fast switch fault detection method (FDM) is a mandatory step to guarantee the service continuity of these systems. This paper proposes a very fast FDM based on the shape of the inductor current associated to fault-tolerant (FT) operation for boost converter used in PV systems. By implementing fault diagnosis and reconfiguration strategies on a single field-programmable gate array target, both types of switch failure (open- and short-circuit faults) can be detected, identified and handled in real time. The FDM uses the signal provided by the current sensor dedicated to the control of the system. Consequently, no additional sensor is required. The proposed FT topology is based on a redundant switch. The results of hardware-in-the-loop and experimental tests, which all confirm the excellent performances of the proposed approach, are presented and discussed. The obtained results show that a switch fault can be detected in less than one switching period, typically around 100 ms in medium power applications, by the proposed FDM.
Sponsorship	IEEE Industrial Electronics Society
Starting Page	7247
Ending Page	7255
Page Count	9
File Size	2234021
File Format	PDF
ISSN	02780046
Volume Number	62
Issue Number	11
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Switches Frequency division multiplexing Fault tolerance Fault tolerant systems Inductors Fault detection Topology Fault tolerant DC-DC converters Photovoltaic system Reliability Real-Time fault detection Switch fault diagnosis switch fault diagnosis Fault-tolerant (FT) dc–dc converters photovoltaic (PV) system real-time fault detection (FD) reliability
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Electrical and Electronic Engineering Computer Science Applications

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