Detection Method for Open-Circuit Fault in Neutral-Point-Clamped Inverter Systems

Kim, Tae-Jin; Lee, Woo-Cheol; Hyun, Dong-Seok

doi:10.1109/tie.2009.2019775

Cited by 119 publications

(6 citation statements)

References 22 publications

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“…For each leg, there are six available current paths according to the current direction and corresponding switching state, as shown in Fig. 1b and summarised in Table 1 [19]. This figure shows that current paths 1, 2, 5 and 6 involve IGBTs, while current paths 3 and 4 use the freewheeling diodes.…”

Section: Analysis Of the 3lnpc Drive Under Normal And Faulty Conditionsmentioning

confidence: 99%

“…Identification of clamp-diode faults [19] steady state RL load no no no [14] steady state AC drive yes no yes [12] steady state RL load yes no no grid-connected yes no no [20] steady state grid-connected (cos j =1) no no no grid-connected (cos j = 0.5) yes no no [22] speed and torque transients AC drive yes no no this paper speed and torque transients AC drive yes yes yes…”

Section: Identification Of Double Faultsmentioning

confidence: 99%

“…Several diagnostic approaches for 3LNPC inverters have been proposed in the literature. A diagnostic method for OC faults based on the analysis of the pole voltage and its duration time is proposed in [19]. This method, however, only identifies the faulty leg without discriminating the faulty switch.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Method to diagnose open‐circuit faults in active power switches and clamp‐diodes of three‐level neutral‐point clamped inverters

Abadi

Mendes

Cruz

2016

IET Electric Power Applications

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A new real-time method able to diagnose multiple semiconductor open-circuit (OC) faults in a three-level neutralpoint clamped inverter is introduced in this paper. The proposed diagnostic method is based on the evaluation of the output pole voltages and output currents of the inverter. The proposed method allows a real-time detection and localisation of multiple OC faults in all active power switches and clamp-diodes within one modulation period. Experimental results obtained for different operating conditions of the inverter demonstrate the applicability and performance of the proposed diagnostic approach.

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Section: Analysis Of the 3lnpc Drive Under Normal And Faulty Conditionsmentioning

confidence: 99%

Section: Identification Of Double Faultsmentioning

confidence: 99%

See 1 more Smart Citation

Method to diagnose open‐circuit faults in active power switches and clamp‐diodes of three‐level neutral‐point clamped inverters

Abadi

Mendes

Cruz

2016

IET Electric Power Applications

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show abstract

“…Tae-Jin et al [16] presented a diagnostic method for OC faults in 3LNPC inverters based on the comparison of the instantaneous voltage values measured between output terminals of each inverter leg and the DC bus middle point. This method has the disadvantage that it needs extra voltage sensors and only identifies the faulty phase.…”

Section: Wwwietdlorgmentioning

confidence: 99%

Fault diagnostic algorithm for three‐level neutral point clamped AC motor drives, based on the average current Park's vector

Mendes¹,

Abadi²,

Cruz³

2014

IET Power Electronics

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This study presents a new fault diagnostic technique for a semiconductor open-circuit fault in a neutral-point clamped inverter, based on the average current Park's vector approach. This method relies on the measurement of two motor line currents and is able to perform a complete diagnosis in less than half of the inverter output current period. The implementation of this diagnostic technique requires no additional current or voltage sensors besides the ones already used by the control algorithm of the converter. The diagnostic method uses the modulus and angle of the normalised average current Park's vector to detect the fault and identify the faulty insulated gate bipolar transistor (IGBT) pair, respectively. Simultaneously, the normalised average values corresponding to the positive and negative parts of the motor supply currents waveforms are used to identify the inner faulty IGBTs with even and odd numbers, respectively. The diagnostic method is also robust to transient conditions imposed by load and speed variations. The performance and effectiveness of the proposed diagnostic technique are validated both by the simulation and experimental results.

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“…Switch fault diagnosis in multilevel inverters has been researched extensively [10][11][12][13][14][15][16][17][18][19][20]. In [15], the detection method is presented for the open-circuit failure in a standard NPC inverter. It requires sensors and a comparator circuit to measure pole voltage and its duration.…”

Section: Introductionmentioning

confidence: 99%

Fault Diagnosis of Open-Switch Failure in a Grid-Connected Three-Level Si/SiC Hybrid ANPC Inverter

Kwon

Kim

et al. 2020

Electronics

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A diagnostic method for an open-circuit switch failure in a hybrid active neutral-point clamped (HANPC) inverter is proposed in this paper. The switching leg of the HANPC inverter consists of four silicon insulated gate bipolar transistors and two silicon carbide metal-oxide-semiconductor field-effect transistors to achieve higher efficiency and power density compared to conventional neutral-point clamped inverters. When an open-circuit failure occurs in a switching device, the output current is severely distorted, causing damage to the inverter and the connected loads. The proposed diagnostic method aims to detect the open-switch failure and protect the related devices without additional sensors or circuits. The faulty conditions of six different switches are investigated based on the current distortion in the stationary reference frame. By analyzing the individual characteristic of each switch failure, it is possible to detect the exact location of the failed switch in a short period. The effectiveness and feasibility of the proposed fault-diagnostic method are verified using simulation and experimental results.

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Detection Method for Open-Circuit Fault in Neutral-Point-Clamped Inverter Systems

Cited by 119 publications

References 22 publications

Method to diagnose open‐circuit faults in active power switches and clamp‐diodes of three‐level neutral‐point clamped inverters

Method to diagnose open‐circuit faults in active power switches and clamp‐diodes of three‐level neutral‐point clamped inverters

Fault diagnostic algorithm for three‐level neutral point clamped AC motor drives, based on the average current Park's vector

Fault Diagnosis of Open-Switch Failure in a Grid-Connected Three-Level Si/SiC Hybrid ANPC Inverter

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