A Novel Fault Detection of an Open-Switch Fault in the NPC Inverter System

Lee, Jung-Dae; Kim, Tae-Jin; Lee, Jae Chul; Hyun, Dong-Seok

doi:10.1109/iecon.2007.4460204

Cited by 7 publications

(4 citation statements)

References 11 publications

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“…Another fault detection scheme relies on the output voltages and currents measurements, thus reducing the number necessary sensors, but the detection dynamics depends on the load characteristics [127]. Another alternative fault detection method, used in NPC inverters to detect open circuit faults, is to sense the pole voltages [128]. The pole voltage includes information of switching states in the NPC inverter, concerned by the dc-link but not affected by the load.…”

Section: Multilevel Inverter Fault Tolerant Operationmentioning

confidence: 99%

“…During abnormal operating conditions, the pole voltage is determined by the direction of the phase current and the switching state for each phase. In this condition, it is necessary to discriminate whether the outer or inner switch is the faulty one and bypassed it using auxiliary switches [128]. The previous discrimination can be done comparing the pole voltage with the switching pattern.…”

Section: Multilevel Inverter Fault Tolerant Operationmentioning

confidence: 99%

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Multilevel Converters: An Enabling Technology for High-Power Applications

et al. 2009

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Multilevel converters are considered today as the state of the art power conversion systems for high power and power quality demanding applications. This paper presents a tutorial on this technology, covering the operating principles, the different power circuit topologies, modulation methods, technical issues and industry applications. Special attention is given to established technology already found in industry with more in depth and self-contained information, while recent advances and state of the art contributions are addressed with useful references. This paper serves as an introduction to the subject for the not familiarized reader, as well as an update or reference for academics and practicing engineers working in the field of industrial and power electronics.

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Section: Multilevel Inverter Fault Tolerant Operationmentioning

confidence: 99%

Section: Multilevel Inverter Fault Tolerant Operationmentioning

confidence: 99%

Multilevel Converters: An Enabling Technology for High-Power Applications

et al. 2009

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“…These are either based on sensing the three-phase output currents [7]- [11] or the DC link voltage ripple distortion [12]- [14]. During fault condition, the average output current in the αβ-plane surpasses a nonzero threshold [7], [8], which can be used in combination with the characteristic shape of the currents [9]- [11] to detect and localize the open circuit fault. A quite similar approach is the sensing of the DC link ripple trajectories in the αβ-plane [12]- [14].…”

Section: A Literature Reviewmentioning

confidence: 99%

“…A field oriented control is implemented, similar as described in Section II, although an induction machine instead of an interior permanent magnet machine is used. Nevertheless, the observer theorem, given in (9), remains valid since the current controller is designed using loop shaping [32]. For safety reasons and simplicity, all measurements are conducted with a nominal DC link voltage of 60 V, which is sufficient to prove the concept validity.…”

Section: Npc Inverter Test Benchmentioning

confidence: 99%

Fault Detection and Localization for Limp Home Functionality of Three-Level NPC Inverters With Connected Neutral Point for Electric Vehicles

Kersten

Oberdieck

Bubert

et al. 2019

IEEE Trans. Transp. Electrific.

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This paper deals with the detection of single battery or inverter switch faults during operation of a common and an active three-level neutral-point-clamped (NPC) inverter with a connected neutral point. Here, a main focus lies on the detection and localization of open circuit faults of the inverter's switches. Therefore, a fault detection algorithm, using a current estimator, and two fault localization algorithms, a pulse pattern injection principle and an online adaption of the space vector modulation, are investigated and verified through simulations and experiments. Also investigated is how the power-train can be operated under fault condition, so that the vehicle can drive with a limited maximum power using an adapted space vector modulation, referred to as "limp home" mode, to the next service station. It is shown, that an active neutral-point-clamped inverter can cope with any single short or open circuit fault of the inverter's switches without bringing the vehicle to standstill, whereas a generic neutral-point-clamped inverter loses controllability, if an open circuit fault at an inner switch occurs. Furthermore, both inverter types are able to be operated just with half of the DC link voltage in case of a failure in one part of the battery.

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Fault tolerance in active power filters, based on multilevel NPC topology

Lopes

Mendes

2012

IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society

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A Novel Fault Detection of an Open-Switch Fault in the NPC Inverter System

Cited by 7 publications

References 11 publications

Multilevel Converters: An Enabling Technology for High-Power Applications

Multilevel Converters: An Enabling Technology for High-Power Applications

Fault Detection and Localization for Limp Home Functionality of Three-Level NPC Inverters With Connected Neutral Point for Electric Vehicles

Fault tolerance in active power filters, based on multilevel NPC topology

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