Investigation of partial discharge frequency dependence in distribution system cables

Negm, Tarek S.; Refaey, Mostafa; Hossam-Eldin, Ahmed A.

doi:10.1049/oap-cired.2017.0532

Cited by 9 publications

(4 citation statements)

References 3 publications

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“…24, No. 2 (2023) Elagoun A, Seghier T.: Parameters that influence the partial discharges occurrence in cavity defect within … 9 related to frequency less than 50 Hz and is negligible for frequency over 50 Hz which is validated in [35,36]. In addition, it is found on the one hand that the frequency variation between 30 Hz and 65 Hz practically reflects the effect of the temporary fluctuation due to the variation of the load on the power frequency and on the other hand the effect of the proliferation of invertor-based grid-tied renewable energy sources on it.…”

Section: Behavior Of the Partial Discharge In The Case Of Frequency M...mentioning

confidence: 94%

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Parameters that influence the partial discharges occurrence in cavity defect within electrical cable insulation

Elagoun¹,

Seghier²

2023

Diagnostyka

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The electrical cable reliability is largely linked to the state of its insulation, which can be threatened by the partial discharges (PDs) activity. This phenomenon is localized in defects created within insulation during the manufacture process and the cable installation. The cavity defect is among the most known defects within the insulating material filled with different gases and having various forms. Under electrical stress, the PDs occur and lead with time to a cable failure. The PDs simulation in cavity defect within cable insulation has became an important tool for a complementary understanding of the experimental task. The plasma model has been considered in last decade as an alternative to describe physically and chemically the PDs mechanism versus the other models such as the capacitance, conductance model. Using plasma model our work aims to simulate the PDs in cavity defect within cable insulation by showing the parameters influence such as the type of gas contained in the cavity, the voltage magnitude and frequency imposed on the insulation on their occurrence through its occurrence mechanisms. This helps to assess the PDs severity on the insulation system to carry out its diagnosis and therefore to have an effective reliability of cable.

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Section: Behavior Of the Partial Discharge In The Case Of Frequency M...mentioning

confidence: 94%

“…On the other hand, this long periodic time permits the free electrons to vanish and become trapped in the cavity defect. So, at low frequencies, the periodic time increases more than material trapping time constant resulting in a greater charge decay at the cavity surface [35,36].…”

Section: Partial Discharge Behavior In the Case Of Frequency Less Tha...mentioning

confidence: 99%

Parameters that influence the partial discharges occurrence in cavity defect within electrical cable insulation

Elagoun¹,

Seghier²

2023

Diagnostyka

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“…The PD may be simulated by the closing of the switch in the circuit when the voltage across the cavity exceeds the inception voltage and a probability function considering the free electron availability exceeds a random number. The probability of discharge occurrence may be determined as in (18) [36]…”

Section: Simulation Of a Capacitive Model Of Pd With Induced Charge Cmentioning

confidence: 99%

Numerical modelling, simulation and experimental validation of partial discharge in cross‐linked polyethylene cables

Joseph¹,

Mohan²,

Sindhu³

2019

IET Science, Measurement & Technology

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“…Since PD cannot be measured directly, it can be measured through its energy products like electrical passers, chemical changes, electromagnetic diffusion, vibration, sound, light and heat. In general, in order to prevent insulation breakdown in electrical devices, one of the followings must be done (i) Measuring, repairing or replacing elements in which electrical breakdown has occurred (considering the lifetime of devices). (ii) Continuous monitoring of insulation of expensive devices such as power machines, HV cables, and electrical panels before the occurrence of any damaging failure [12–14 ]. PD should be investigated in devices to determine the exhaustion and failure of electrical insulation; therefore, PD location helps the maintenance and reduces the occurrence of significant events [15, 16 ].…”

Section: Introductionmentioning

confidence: 99%

Determining the exact location of partial discharge in coil insulation of high-voltage machine using high-frequency model of the machine

Khezri

Akbari

Saied

2020

IET Science, Measurement &Amp; Technology

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The current study is aimed at investigating the exact location of partial discharge (PD) in coil insulation of a 6 KV/250 KW induction machine. Since measured PD signals have frequency components of kilohertz (KHz) to megahertz (MHz), it is necessary to employ fast and very fast transient models of electrical machines for locating PDs. In this study, a PD current pulse with MHz frequency component is injected to the multi‐conductor transmission line model of each turn of the coil with frequency validity of >1 MHz. Considering coils as an interface between voltage source and finite element region, all circuit and field equations are rewritten to obtain the system final matrix, so that PD pulse is extracted. Experiment and simulation results show high accuracy of developed model to determine the exact location of PD.

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Investigation of partial discharge frequency dependence in distribution system cables

Cited by 9 publications

References 3 publications

Parameters that influence the partial discharges occurrence in cavity defect within electrical cable insulation

Parameters that influence the partial discharges occurrence in cavity defect within electrical cable insulation

Numerical modelling, simulation and experimental validation of partial discharge in cross‐linked polyethylene cables

Determining the exact location of partial discharge in coil insulation of high-voltage machine using high-frequency model of the machine

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