Prospective method for partial discharge detection in large AC machines using magnetic sensors in low electric field zones

Ait-Amar, S.; Rogera, D.

doi:10.1049/cp.2011.0042

Cited by 4 publications

(2 citation statements)

References 6 publications

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“…In general, electromagnetic waves formed during the sudden PD formation can be detected by various types of antennas. The electromagnetic wave generated by PD formation was detected and analyzed by using a patch antenna [9]. This antenna design used UHF sensors in order to observe wideband high frequency PD signals within the range of 300 MHz to 3 GHz.…”

Section: Introductionmentioning

confidence: 99%

Partial Discharge Detection in Pressboards Immersed in Mineral Insulation Oil With Quantum Well Hall Effect Magnetic Field Sensors

et al. 2022

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Insulation degradation may cause inefficient and faulty operation of transformers. The insulation failures in transformers mostly start with a Partial Discharge (PD) event. For both operational and cost reasons to ensure the best performance and functionality of transformers, early detection of PD events is of great importance. In this paper presents a novel PD detection technique by using a highly sensitive Quantum Well Hall Effect (QWHE) magnetic field sensor and compare the findings with an off-the-shelf silicon magnetic field transducer. The investigation of the QWHE for high voltage engineering problem such as PD detection is given first time in this paper. The aim of the study is to detect PD activity in pressboards immersed in mineral insulation oil experimentally using a new QWHE sensor. The measured experimental data from both sensors are decomposed by Empirical Mode Decomposition (EMD) and Wavelet Decomposition (WD) methods, and PD signals are analyzed comparatively. The results show that QWHE sensors provide more accurate and noise free measurements allowing early and more accurate PD detections.

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Section: Introductionmentioning

confidence: 99%

Partial Discharge Detection in Pressboards Immersed in Mineral Insulation Oil With Quantum Well Hall Effect Magnetic Field Sensors

et al. 2022

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“…In the first pre‐fault stage, the deterioration process of the insulation is usually slowly developing and accelerates rapidly in the final stage, resulting for example in an inter‐turn short circuit, which is an actual fault condition. Current practice for insulation condition tests in industry are dissipation factor tan( δ ) with tan( δ ) tip‐up [11], partial discharge [12, 13] and polarisation index or surface insulation resistance test [14]. Principally, most of the tests are applied with the machine partly disassembled from the drive system.…”

Section: Introductionmentioning

confidence: 99%

Impact of SiC semiconductors switching transition speed on insulation health state monitoring of traction machines

Zoeller

Vogelsberger²,

Wolbank

et al. 2016

IET Power Electronics

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In modern traction propulsion applications, voltage source inverter (VSI) fed traction motors today operate very close to borderline conditions. With new emerging semiconductor technologies, higher inverter switching frequencies will be possible and high inverter dv/dt-rates appear, resulting in transient overvoltages at the machine which increase the stress on the insulation system and lead to insulation degradation. Thus, insulation condition monitoring is getting more and more important to ensure a safe and reliable operation of traction motors in trains and locomotives, trams and so on. This study proposes an online insulation monitoring approach that is able to detect incipient insulation defects by evaluation of the motor transient current response on voltage pulses injected by standard inverter switching. Experimental results of this concept are obtained with tests on a 1.4 MW induction machine for railway application. Additionally, the influence of different dv/dt-rates up to 20 kV/µs on the monitoring performance is verified using a VSI-inverter equipped with SiC semiconductors.

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Influence of parasitic capacitances of IGBT inverter on insulation condition monitoring of traction machines based on current signal transients analysis

Zoeller

Vogelsberger

Wolbank

2016

2016 18th European Conference on Power Electronics and Applications (EPE'16 ECCE Europe)

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Prospective method for partial discharge detection in large AC machines using magnetic sensors in low electric field zones

Cited by 4 publications

References 6 publications

Partial Discharge Detection in Pressboards Immersed in Mineral Insulation Oil With Quantum Well Hall Effect Magnetic Field Sensors

Partial Discharge Detection in Pressboards Immersed in Mineral Insulation Oil With Quantum Well Hall Effect Magnetic Field Sensors

Impact of SiC semiconductors switching transition speed on insulation health state monitoring of traction machines

Influence of parasitic capacitances of IGBT inverter on insulation condition monitoring of traction machines based on current signal transients analysis

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