Partial discharge inception and propagation characteristics of magnet wire for inverter-fed motor under surge voltage application

Hayakawa, Naoki; Inano, Hiroyuki; Inuzuka, Katsumi; Morikawa, M.; Ōkubo, H.

doi:10.1109/tdei.2007.302870

Cited by 47 publications

(13 citation statements)

References 6 publications

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“…Then, PDIV decreases with the increase in the stressed size, which is generally referred to as the "Size effect". The size effect on PDIV as a function of wire contact length (surface) has been quantitatively evaluated as shown in Figure 8 [25].…”

Section: Partial Discharge Inceptionmentioning

confidence: 99%

Technical Development on Partial Discharge Measurement and Electrical Insulation Techniques for Low Voltage Motors Driven by Voltage Inverters

Ōkubo

Hayakawa

Montanari

2007

IEEE Trans. Dielect. Electr. Insul.

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This paper reviews the up-to-date research activities on electrical insulation techniques under repetitive surge voltages with steep wavefront for low voltage inverter-fed motors. Partial discharge (PD) inception, propagation, ageing and breakdown characteristics of magnet wires, including recently developed PD-resistant wires such as nanocomposite enameled wires, are described. PD measurement techniques under the steep-front voltages and IEC activity toward their standardization are also introduced.

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Section: Partial Discharge Inceptionmentioning

confidence: 99%

Technical Development on Partial Discharge Measurement and Electrical Insulation Techniques for Low Voltage Motors Driven by Voltage Inverters

Ōkubo

Hayakawa

Montanari

2007

IEEE Trans. Dielect. Electr. Insul.

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“…The influences of voltage distortion, harmonics and transients on partial discharges (PD) at AC systems have been investigated in [3][4][5] and it was reported that these phenomena hasten the insulation degradation. Accordingly, PD diagnostic methods have been proposed and developed [6,7].…”

Section: Introductionmentioning

confidence: 99%

Partial discharge behavior under operational and anomalous conditions in HVDC systems

Fard

Farrag

McMeekin

et al. 2017

IEEE Trans. Dielect. Electr. Insul.

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Power cables undergo various types of overstressing conditions during their operation that influence the integrity of their insulation systems. This causes accelerated ageing and might lead to their premature failure in severe cases. This paper presents an investigation of the impacts of various dynamic electric fields produced by ripples, polarity reversal and transient switching impulses on partial discharge (PD) activity within solid dielectrics with the aim of considering such phenomena in high voltage direct current (HVDC) cable systems. Appropriate terminal voltages of a genericHVDC converter were reproduced -with different harmonic contaminations -and applied to the test samples. The effects of systematic operational polarity reversal and superimposed switching impulses with the possibility of transient polarity reversal were also studied in this investigation. The experimental results show that the PD is greatly affected by the dynamic changes of electric field represented by polarity reversal, ripples and switching. The findings of this study will assist in understanding the behaviour of PDs under HVDC conditions and would be of interest to asset managers considering the effects of such conditions on the insulation diagnostics. where he is engaged in research on power system control and operation, renewable energy integration and energy storage systems.

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“…To reduce the interference of background noise, the conventional PD measurement combines the denoising technique in the online application [1]. For the optical method, some researchers use the photo multiplier tube and still camera to detect the PD signal from inverter-fed motor coils [2]. To sense the PD current impulses, Rogowski coils and wide bandwidth current transformers are used to measure PD from an online turbo generator in the very high frequency (VHF) range [3].…”

Section: Introductionmentioning

confidence: 99%

Partial discharge detection of 3.3-kV motor by coil

Chen

Cheng

Chen

2016

Int. Trans. Electr. Energ. Syst.

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The coil is used to detect partial discharge (PD) in the 3.3-kV motor. Because of the noise issue, most studies detect PD of the motor at the power bus or at neutral. However, we use three coils inserted in the slot of three motor frames to detect PD. This conflicts with conventional thought. For safety, the motor frame is always grounded to the earth. In addition, most people think it is impossible to detect PD on the grounded motor frame. Most researchers say we measure noise or high-frequency current on the motor frame. In this paper, we design an experiment to prove that what we measure is the induction magnetic field of PD. From the amplitude variation of the PD signal, the imperfect motor can be identified. Moreover, by measuring the PD signal and the three-phase 60-Hz waveform, we can determine the phase at which PD occurs.high-intensity PD signal can be detected by the coil. Because most PD power is below 100 MHz for a winding device [16], coil S m will detect the PD signal with good performance. Verification of induction magnetic field passing through steelAs shown in Figure 2(b) and (c), the induction magnetic field of the PD passes through the paper insulator and stator core to the coil. To simulate this condition, we perform verification tests using the standard 11.4-kV power transformer tank filled with insulation oil to do the experiment. As for PD detection, except for mechanical dimension, the structure of the transformer tank in Figure 5(a) Figure 4. Reflection coefficients S 11 of two sensors (30 kHz to 100 MHz): (a) sensor S 1, (2 dB/div), (b) sensor S m (5 dB/div).

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Partial discharge inception and propagation characteristics of magnet wire for inverter-fed motor under surge voltage application

Cited by 47 publications

References 6 publications

Technical Development on Partial Discharge Measurement and Electrical Insulation Techniques for Low Voltage Motors Driven by Voltage Inverters

Technical Development on Partial Discharge Measurement and Electrical Insulation Techniques for Low Voltage Motors Driven by Voltage Inverters

Partial discharge behavior under operational and anomalous conditions in HVDC systems

Partial discharge detection of 3.3-kV motor by coil

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