8 results on '"Poure, Philippe"'
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2. Photovoltaic Systems Reliability Improvement by Real-Time FPGA-Based Switch Failure Diagnosis and Fault-Tolerant DC–DC Converter.
- Author
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Jamshidpour, Ehsan, Poure, Philippe, and Saadate, Shahrokh
- Subjects
- *
PHOTOVOLTAIC power systems , *PENETRATION mechanics , *MECHANICAL loads , *FAULT tolerance (Engineering) , *FIELD programmable gate arrays , *TELECOMMUNICATION - 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. [ABSTRACT FROM PUBLISHER]
- Published
- 2015
- Full Text
- View/download PDF
3. Wind energy conversion system based on DFIG with open switch fault tolerant six-legs AC-DC-AC converter.
- Author
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Shahbazi, Mahmoud, Zolghadri, Mohammad Reza, Poure, Philippe, and Saadate, Shahrokh
- Abstract
Continuity of service of wind energy conversion systems as well as their reliability and performances are some of the major concerns in this power generation area. Six-legs AC/DC/AC converters are normally used in modern wind energy systems like as in the system with a doubly-fed induction generator (DFIG). A sudden failure of the converter can lead to the total or partial loss of the control of the phase currents and can cause serious system malfunction or shutdown. Therefore, to prevent the spread of the fault to the other system components and to ensure continuity of service, fault tolerant converter topologies associated to quick and effective fault detection and compensation methods must be implemented. In this paper, a fault tolerant AC/DC/AC converter for a wind energy conversion system based on a DFIG is studied. The presented six-legs converter uses an additional leg that replaces the faulty one after the fault detection. An FPGA is used for experimental implementation of the fault detection scheme, to assure the fast fault detection. A rapid prototyping based on an intermediate “FPGA in the loop” step is used for digital implementation. “FPGA in the loop” results as well as fully experimental results are provided to demonstrate the effectiveness of the proposed fault detection and fault tolerant control. [ABSTRACT FROM PUBLISHER]
- Published
- 2013
- Full Text
- View/download PDF
4. Open- and Short-Circuit Switch Fault Diagnosis for Nonisolated DC–DC Converters Using Field Programmable Gate Array.
- Author
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Shahbazi, Mahmoud, Jamshidpour, Ehsan, Poure, Philippe, Saadate, Shahrokh, and Zolghadri, Mohammad Reza
- Subjects
CONVERTERS (Electronics) ,PROTOCOL converters ,SWITCHING power supplies ,DIGITAL control systems ,POWER semiconductors - Abstract
Fault detection (FD) in power electronic converters is necessary in embedded and safety critical applications to prevent further damage. Fast FD is a mandatory step in order to make a suitable response to a fault in one of the semiconductor devices. The aim of this study is to present a fast yet robust method for fault diagnosis in nonisolated dc–dc converters. FD is based on time and current criteria which observe the slope of the inductor current over the time. It is realized by using a hybrid structure via coordinated operation of two FD subsystems that work in parallel. No additional sensors, which increase system cost and reduce reliability, are required for this detection method. For validation, computer simulations are first carried out. The proposed detection scheme is validated on a boost converter. Effects of input disturbances and the closed-loop control are also considered. In the experimental setup, a field programmable gate array digital target is used for the implementation of the proposed method, to perform a very fast switch FD. Results show that, with the presented method, FD is robust and can be done in a few microseconds. [ABSTRACT FROM PUBLISHER]
- Published
- 2013
- Full Text
- View/download PDF
5. FPGA-Based Reconfigurable Control for Fault-Tolerant Back-to-Back Converter Without Redundancy.
- Author
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Shahbazi, Mahmoud, Poure, Philippe, Saadate, Shahrokh, and Zolghadri, Mohammad Reza
- Subjects
- *
FIELD programmable gate arrays , *FAULT tolerance (Engineering) , *CONVERTERS (Electronics) , *SEMICONDUCTOR switches , *CAPACITOR switching , *MATHEMATICAL models - Abstract
In this paper, an FPGA-based fault-tolerant back-to-back converter without redundancy is studied. Before fault occurrence, the fault-tolerant converter operates like a conventional back-to-back six-leg converter, and after the fault, it becomes a five-leg converter. Design, implementation, and experimental verification of an FPGA-based reconfigurable control strategy for this converter are discussed. This reconfigurable control strategy allows the continuous operation of the converter with minimum affection from a fault in one of the semiconductor switches. A very fast detection scheme is used to detect and locate the fault. Implementation of the fault detection and of the fully digital control schemes on a single FPGA is realized, based on a suited methodology for rapid prototyping. FPGA in loop and also experimental tests are carried out, and the results are presented. These results confirm the capability of the proposed reconfigurable control and fault-tolerant structure. [ABSTRACT FROM PUBLISHER]
- Published
- 2013
- Full Text
- View/download PDF
6. Fault-Tolerant Five-Leg Converter Topology With FPGA-Based Reconfigurable Control.
- Author
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Shahbazi, Mahmoud, Poure, Philippe, Saadate, Shahrokh, and Zolghadri, Mohammad Reza
- Subjects
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CONVERTERS (Electronics) , *FIELD programmable gate arrays , *MICROPROCESSORS , *FAULT tolerance (Engineering) , *SIMULATION methods & models - Abstract
Fast fault detection and reconfiguration of power converters is necessary in electrical drives to prevent further damage and to make the continuity of service possible. On the other hand, component minimized converters may provide the benefits of higher reliability and less volume and cost. In this paper, a new fault-tolerant converter topology is studied. This converter has five legs before the fault occurrence, and after fault detection the converter continues to function with four legs. A very fast fault detection and reconfiguration scheme is presented and studied. Simulations and experimental tests are performed to evaluate the structure requirements, the digital reconfigurable controller, and fault detection scheme. For experimental tests, the control and the fault detection and reconfiguration schemes are implemented on a single field-programmable gate array (FPGA) chip. Experimental and simulation results show the effectiveness of the proposed fault-tolerant topology and its FPGA-based control. [ABSTRACT FROM PUBLISHER]
- Published
- 2013
- Full Text
- View/download PDF
7. Six-Leg AC-AC Fault Tolerant Converter with Reduced Extra-Sensor Number.
- Author
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Shahbazi, Mahmoud, Poure, Philippe, Zolghadri, Mohammad Reza, and Saadate, Shahrokh
- Subjects
FAULT tolerance (Engineering) ,CONVERTERS (Electronics) ,ELECTRIC fault location ,ELECTRIC potential ,FIELD programmable gate arrays ,TOPOLOGY ,DETECTORS ,REDUNDANCY in engineering - Abstract
In order to prevent further damage and to provide the continuity of service of six-leg converter in case of open-switch fault, it is mandatory to perform fast fault detection and converter reconfiguration schemes. Extra sensors are needed to detect the faults rapidly. In this paper, a very fast FPGA-based fault detection scheme is presented that minimizes the number of additional voltage sensors. A six-leg fault tolerant converter topology without redundancy and with bidirectional power flow is studied. First simulations are carried out to evaluate the proposed fault detection principle and the fault tolerant converter topology. The fully digital control and the fault detection are implemented on a single FPGA. Experimental tests of the digital controller and the detection scheme are performed to verify the high performance of the proposed method. [ABSTRACT FROM AUTHOR]
- Published
- 2011
8. Open-circuit switch fault tolerant wind energy conversion system based on six/five-leg reconfigurable converter.
- Author
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Shahbazi, Mahmoud, Saadate, Shahrokh, Poure, Philippe, and Zolghadri, MohammadReza
- Subjects
- *
WIND energy conversion systems , *CONVERTERS (Electronics) , *ELECTRIC faults , *OPEN-circuit voltage , *FAULT tolerance (Engineering) , *FIELD programmable gate arrays - Abstract
In this paper, an FPGA-controlled fault tolerant back-to-back converter for DFIG-based wind energy conversion application is studied. Before an open-circuit failure in one of the semiconductors, the fault tolerant converter operates as a conventional back-to-back six-leg one. After the fault occurrence in one of the switches, the converter will continue its operation with the remaining five healthy legs. Design, implementation, simulation and experimental verification of a reconfigurable control strategy for the fault tolerant six/five leg converter used in wind energy conversion are discussed. The proposed reconfigurable control strategy allows the uninterrupted operation of the converter with minimum affection from an open-circuit switch failure in one of the semiconductors. Software reconfiguration is also necessary in PWM signal generation unit, to assure that proper gate signals are calculated and generated based on the actual five-leg structure Simulations and experimental tests are carried out and the results are presented and compared. They all confirm the capability of the studied reconfigurable control and proposed fault tolerant architecture in ensuring the system's service continuity. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
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