Open Circuit Fault Tolerant Bridgeless Cuk Rectifier with Fault Detection Technique

In this paper, an open-switch fault diagnosis method for five-level H-Bridge Neutral Point Piloted (HB-NPP) or T-type converters is proposed. While fault tolerant operation is based on three steps (fault detection, fault localization and system reconfiguration), a fast fault diagnosis, including both fault detection and localization, is mandatory to make a suitable response to an open-circuit fault in one of the switches of the converter. Furthermore, fault diagnosis is necessary in embedded and safety critical applications, to prevent further damage and perform continuity of service.In this paper, we present an open-switch fault diagnosis method, based on the switches control orders and the observation of the converter output voltage level. In five-level converters such as HB-NPP and T-type topologies, some switches are mostly 'on' at the same time. Therefore, the fault localization is quite complicated. The fault diagnosis method we proposed is capable to detect and localize an open-switch fault in all cases. Computer simulations are carried out by using Matlab Simulink and SimPowerSystem toolbox to validate the proposed approach.

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Fault-Tolerant Voltage Source Converter for Wind-Driven Doubly Fed Induction Generator Connected to a DC Load

Journal of Circuits System and Computers ◽

10.1142/s0218126618501530 ◽

2018 ◽

Vol 27 (10) ◽

pp. 1850153 ◽

Cited By ~ 7

Author(s):

Bilel Touaiti ◽

Hechmi Ben Azza ◽

Mongi Moujahed ◽

Mohamed Jemli

Keyword(s):

Fault Detection ◽

Fault Tolerant ◽

Open Circuit ◽

Photovoltaic System ◽

Voltage Source ◽

Induction Generator ◽

Voltage Source Converter ◽

Doubly Fed Induction Generator ◽

Detection Scheme ◽

Doubly Fed

This paper presents a fault-tolerant Voltage Source Converter (VSC) for Field Oriented Control (FOC) of a stand-alone Doubly Fed Induction Generator (DFIG) connected to a DC load. In the proposed topology, the stator of the DFIG is connected to a DC load through a diode rectifier, while the rotor is connected to the DC load through a VSC. This topology allows the integration of DFIG in the hybrid system with other sources of production and storage, such as photovoltaic system, connected to the same DC bus. The fault-tolerant VSC consists in incorporating a fourth leg to replace the faulted leg. A fault detection scheme for switch device open-circuit faults is proposed in this study. The novelty of this method consists in analyzing the rotor currents within normal and faulty operating modes. Simulation results are presented for a 3.7[Formula: see text]kW DFIG-DC system with single open-circuit faults that validate the methods presented in this study. The effectiveness of the proposed fault detection method has been validated experimentally by using dSpace DS1104 control board based on TMS320F240 real time Digital Signal Processor (DSP).

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Open-Circuit Fault Detection Technique for Fault-Tolerant Bridgeless Boost Rectifier

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i3.15.17523 ◽

2018 ◽

Vol 7 (3.15) ◽

pp. 168

Author(s):

R K Abdul Razak ◽

K S Muhammad ◽

R Baharom ◽

A M I Mamat

Keyword(s):

Fault Detection ◽

Power Supply ◽

Fault Tolerant ◽

Input Power ◽

Open Circuit ◽

Simulation Software ◽

Detection Scheme ◽

Boost Rectifier ◽

A New Technique ◽

Reliable Power Supply

Unexpected failure in one of the switches in a converter will lessen the performance of a system and may even prompt to a system failure. Therefore, to reduce the failure rate and to prevent unscheduled shutdown, a real-time fault detection is necessary. In this paper, a new technique to identify the exact location of the faulty switch based on single-phase bridgeless boost converter is proposed. The faulty switch is detected by analyzing the boost inductor current, switching mode and cycle of the input power supply. The information of the faulty switch will be used to redirect the current to any available path. Therefore, an uninterruptable and reliable power supply could be developed. The analysis of the proposed fault detection scheme is done by using PSIM simulation software.

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Applicability Analysis of Indices-Based Fault Detection Technique of Six-Phase Induction Motor

Energies ◽

10.3390/en14185905 ◽

2021 ◽

Vol 14 (18) ◽

pp. 5905

Author(s):

Khaled Farag ◽

Abdullah Shawier ◽

Ayman S. Abdel-Khalik ◽

Mohamed M. Ahmed ◽

Shehab Ahmed

Keyword(s):

Fault Detection ◽

Induction Motor ◽

Induction Motors ◽

Fault Tolerant ◽

Mathematical Formulation ◽

Detection Technique ◽

Control Mode ◽

Detection Methods ◽

Promising Alternative ◽

Open Phase

The multiphase induction motor is considered to be the promising alternative to the conventional three-phase induction motor, especially in safety-critical applications because of its inherent fault-tolerant feature. Therefore, the attention of many researchers has been paid to develop different techniques for detecting various fault types of multiphase induction motors, to securely switch the control mode of the multiphase drive system to its post-fault operation mode. Therefore, several fault detection methods have been researched and adapted; one of these methods is the indices-based fault detection technique. This technique was firstly introduced to detect open-phase fault of multiphase induction motors. The main advantage of this technique is that its mathematical formulation is straightforward and can easily be understood and implemented. In this paper, the study of the indices-based fault detection technique has been extended to test its applicability in detecting some other stator and rotor fault types of multiphase induction motors, namely, open-phase, open-switch, bad connection and broken rotor bar faults. Experimental and simulation validations of this technique are also introduced using a 1 kW prototype symmetrical six-phase induction motor.

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A simple open-circuit fault detection method for a fault-tolerant DC/DC converter

2015 IEEE 11th International Conference on Power Electronics and Drive Systems ◽

10.1109/peds.2015.7203511 ◽

2015 ◽

Cited By ~ 10

Author(s):

John Long Soon ◽

Dylan Dah-Chuan Lu

Keyword(s):

Fault Detection ◽

Detection Method ◽

Fault Tolerant ◽

Open Circuit

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Asymmetric Multilevel Inverter Topology and Its Fault Management Strategy for High-Reliability Applications

Energies ◽

10.3390/en14144302 ◽

2021 ◽

Vol 14 (14) ◽

pp. 4302

Author(s):

Mohammad Fahad ◽

Mohd Tariq ◽

Adil Sarwar ◽

Mohammad Modabbir ◽

Mohd Aman Zaid ◽

...

Keyword(s):

Fault Tolerance ◽

Fault Detection ◽

Detection Method ◽

Fault Tolerant ◽

High Reliability ◽

Open Circuit ◽

Multilevel Inverter ◽

Level Control ◽

Machine Learning Classification ◽

Inverter Topology

As the applications of power electronic converters increase across multiple domains, so do the associated challenges. With multilevel inverters (MLIs) being one of the key technologies used in renewable systems and electrification, their reliability and fault ride-through capabilities are highly desirable. While using a large number of semiconductor components that are the leading cause of failures in power electronics systems, fault tolerance against switch open-circuit faults is necessary, especially in remote applications with substantial maintenance penalties or safety-critical operation. In this paper, a fault-tolerant asymmetric reduced device count multilevel inverter topology producing an 11-level output under healthy conditions and capable of operating after open-circuit fault in any switch is presented. Nearest-level control (NLC) based Pulse width modulation is implemented and is updated post-fault to continue operation at an acceptable power quality. Reliability analysis of the structure is carried out to assess the benefits of fault tolerance. The topology is compared with various fault-tolerant topologies discussed in the recent literature. Moreover, an artificial intelligence (AI)-based fault detection method is proposed as a machine learning classification problem using decision trees. The fault detection method is successful in detecting fault location with low computational requirements and desirable accuracy.

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Common Switch Fault Diagnosis for Two-Stage DC-DC Converters Used in Energy Harvesting Applications

Electronics ◽

10.3390/electronics8030293 ◽

2019 ◽

Vol 8 (3) ◽

pp. 293 ◽

Cited By ~ 1

Author(s):

Ehsan Jamshidpour ◽

Philippe Poure ◽

Shahrokh Saadate

Keyword(s):

Fault Diagnosis ◽

Energy Harvesting ◽

Fault Detection ◽

Fault Tolerant ◽

Short Circuit ◽

Open Circuit ◽

Hardware In The Loop ◽

Two Stage ◽

Synchronous Control ◽

Detection Algorithms

This paper proposes a new Unified Switch Fault Diagnosis (UFD) approach for two-stage non-isolated DC-DC converters used in energy harvesting applications. The proposed UFD is compared with a switch fault diagnosis consisting of two separate fault detection algorithms, working in parallel for each converter. The proposed UFD is simpler than the two parallel fault diagnosis methods in realization. Moreover, it can detect both types of switch failures, open circuit and short circuit switch faults. It can also be used for any two-stage non-isolated DC-DC converters based on two single switch converters, no matter the converter circuits in each stage. Some selected simulation and Hardware-in-the-Loop (HIL) experimentation results confirm the validity and efficiency of the proposed UFD. Also, the proposed UFD is applied successfully for fault-tolerant operation of a buck/buck–boost two-stage converter with synchronous control and a redundant switch.

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Internal Leakage Fault Detection and Tolerant Control of Single-Rod Hydraulic Actuators

Mathematical Problems in Engineering ◽

10.1155/2014/345345 ◽

2014 ◽

Vol 2014 ◽

pp. 1-14 ◽

Cited By ~ 14

Author(s):

Jianyong Yao ◽

Guichao Yang ◽

Dawei Ma

Keyword(s):

Fault Detection ◽

Simple Structure ◽

Control Method ◽

Fault Tolerant ◽

Parameter Adaptation ◽

Servo Systems ◽

Hydraulic Actuators ◽

Quadratic Lyapunov Functions ◽

Safety And Reliability ◽

Hydraulic Servo

The integration of internal leakage fault detection and tolerant control for single-rod hydraulic actuators is present in this paper. Fault detection is a potential technique to provide efficient condition monitoring and/or preventive maintenance, and fault tolerant control is a critical method to improve the safety and reliability of hydraulic servo systems. Based on quadratic Lyapunov functions, a performance-oriented fault detection method is proposed, which has a simple structure and is prone to implement in practice. The main feature is that, when a prescribed performance index is satisfied (even a slight fault has occurred), there is no fault alarmed; otherwise (i.e., a severe fault has occurred), the fault is detected and then a fault tolerant controller is activated. The proposed tolerant controller, which is based on the parameter adaptive methodology, is also prone to realize, and the learning mechanism is simple since only the internal leakage is considered in parameter adaptation and thus the persistent exciting (PE) condition is easily satisfied. After the activation of the fault tolerant controller, the control performance is gradually recovered. Simulation results on a hydraulic servo system with both abrupt and incipient internal leakage fault demonstrate the effectiveness of the proposed fault detection and tolerant control method.

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