A Simple ANN-Based Diagnosis Method for Open-Switch Faults in Power Converters

The conversion system is a major contributor to failure rates. These faults lead to time and cost consuming. Fault diagnosis capabilities pay as a solver to achieve a steady system. This paper presents a full analysis of permanent magnet synchronous generator wind system (PMSGWS) and proposes a special RMS voltage-based fault diagnosis method. The full analysis presents a comprehensive knowledge of faulty behaviors especially under arm current flowing or cutting off. Due to enough knowledge of faulty behaviors, the implementation of the detection method without threshold setting is contributed by the special RMS voltage. Its sample period is set longer than the time of the maximum pulse width ratio (MPR) and shorter than the fault show time of lower tube voltage. Due to this, the detection speed and robustness are achieved. By these simple settings for the fault diagnosis method, the faulty switch is detected in less than 1/4 of the period. Simulation and experimental results confirm the validity and feasibility of the new proposed fault detection method.

Download Full-text

Open-Switch Fault Diagnosis Method in Voltage-Source Inverters Based on Phase Currents

IEEE Access ◽

10.1109/access.2019.2913164 ◽

2019 ◽

Vol 7 ◽

pp. 63619-63625 ◽

Cited By ~ 9

Author(s):

Zhang Jian-Jian ◽

Chen Yong ◽

Chen Zhang-Yong ◽

Zhou Anjian

Keyword(s):

Fault Diagnosis ◽

Voltage Source ◽

Voltage Source Inverters ◽

Open Switch ◽

Diagnosis Method

Download Full-text

Fault Tolerant Power Converter Topologies for Sensor-less Speed Control of PMSM Drives

Periodica Polytechnica Electrical Engineering and Computer Science ◽

10.3311/ppee.14048 ◽

2019 ◽

Vol 63 (3) ◽

pp. 227-234

Author(s):

Mongi Moujahed ◽

Bilel Touaiti ◽

Hechmi Ben Azza ◽

Mohamed Jemli ◽

Mohamed Boussak

Keyword(s):

Power Converters ◽

Control Method ◽

Fault Tolerant ◽

Simple Algorithm ◽

Speed Control ◽

Power Converter ◽

Converter Topologies ◽

Diagnosis Method ◽

Mechanical Sensor ◽

Opening Phase

This paper exhibits a sensor-less speed control method based MRAS observer applied to a fault-tolerant PMSM drive system. So, this paper proposes a rapid method of fault switch detection in the power converters aiming to make sure the continuity of service even though the fault presence of an opening phase. In fact, the MRAS observer is used to replace the mechanical sensor and a redundant inverter leg is equally employed to replace the faulty leg. The proposed fast fault diagnosis method has the features of simple algorithm, independence of the transient states and being simply integrated without any additional sensors.

Download Full-text

Simple sensorless diagnosis method for open-switch faults in SVM-VSI-fed induction motor drive

IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society ◽

10.1109/iecon.2013.6700507 ◽

2013 ◽

Cited By ~ 18

Author(s):

Teresa Orlowska-Kowalska ◽

Piotr Sobanski

Keyword(s):

Induction Motor ◽

Motor Drive ◽

Induction Motor Drive ◽

Open Switch ◽

Diagnosis Method

Download Full-text

Diagnosis method of an open-switch fault for a grid-connected T-type three-level inverter system

2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG) ◽

10.1109/pedg.2012.6254044 ◽

2012 ◽

Cited By ~ 13

Author(s):

U. M. Choi ◽

K. B. Lee ◽

F. Blaabjerg

Keyword(s):

Open Switch ◽

Diagnosis Method

Download Full-text

Study by modeling and simulation of open-switch fault diagnosis for five-level converters

Transactions on Environment and Electrical Engineering ◽

10.22149/teee.v2i1.76 ◽

2017 ◽

Vol 2 (1) ◽

Author(s):

Florent Becker ◽

Ehsan Jamshidpour ◽

Philippe Poure ◽

Shahrokh Saadate

Keyword(s):

Fault Diagnosis ◽

Fault Detection ◽

Fault Tolerant ◽

Fault Localization ◽

Open Circuit ◽

System Reconfiguration ◽

Open Switch ◽

Diagnosis Method ◽

Control Orders ◽

Detection And Localization

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.

Download Full-text