Statistical Analysis of Partial Discharge Faults of HV Cables

Cheng, Yongpan; Zhao, Li; Wu, Xutao; Ni, Hui; Ding, Peng; Li, Xiuguang; Zhou, Xinbo

doi:10.1109/eic47619.2020.9158684

Cited by 6 publications

(5 citation statements)

References 2 publications

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“…The theoretical model is shown in Equations ( 1)-( 4). Based on the above assumptions and Maxwell's equations, the control equations of the electromagnetic field in the temperature field solution are shown in Equation (1). According to Fourier's law, the losses generated by the cable will be converted into heat without considering the external heat source, thus increasing the temperature of the cable and the surrounding medium.…”

Section: Theoretical Modelmentioning

confidence: 99%

“…Along with the development of smart grids, the stable operation of high-voltage cables, as important carriers of electric power transmission, is conducive to guaranteeing the quality of a power supply and improving the safety and reliability of power transmission lines [1][2][3]. The conductor temperature of high-voltage cables is one of the important parameters that directly determine their load capacity [4,5].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Conductor Temperature Monitoring of High-Voltage Cables Based on Electromagnetic-Thermal Coupling Temperature Analysis

Zhang

et al. 2022

Energies

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As a key state parameter of high-voltage cables, conductor temperature is an essential determinant of the current carrying capacity of cables, but in practice, this is difficult to measure directly during the operation of high-voltage cables. In this paper, the electromagnetic-thermal coupling analysis model of a 110 kV high-voltage cable is established using the finite element analysis software COMSOL. By analyzing the temperature distribution law of high-voltage cables under different load currents and ambient temperatures, the relationship between the change in the high-voltage cable surface temperature and the conductor temperature is deduced, which allows the monitoring of the high-voltage cable conductor temperature. Taking the 110 kV cable of the Yanzhong line in Shanxi Province as an example and using the electromagnetic-thermal coupling temperature field analysis method, the conductor temperature of the high-voltage cable can be measured using the data obtained from the cable surface temperature, which is measured by the self-developed Raman Distributed Temperature Sensor (RDTS) system with a maximum measurement error of about 2 °C. The method is easy to use and can achieve the accurate measurement of the conductor temperature without damaging the cable body.

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Section: Theoretical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Conductor Temperature Monitoring of High-Voltage Cables Based on Electromagnetic-Thermal Coupling Temperature Analysis

Zhang

et al. 2022

Energies

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“…In China, the ratio of XLPE power cables is more than 95% for a voltage rating below 220 kV. However, the XLPE power cable has frequently suffered from discharge ablation (Yang and Li, 2020), which affects the safe operation of power systems (He et al, 2018). Therefore, much attention has been concentrated on the mechanism of ablation damage caused by partial discharge for operation, maintenance and design.…”

Section: Introductionmentioning

confidence: 99%

“…Crosslinked polyethylene (XLPE)-insulated cable has been used in power systems since the 1960s (Tomarov and Shipkov, 2019). At present, it is frequently used in power transmission systems around the world due to its good mechanical and electrical performance (Liang et al , 2021).…”

Section: Introductionmentioning

confidence: 99%

A plasma energy deposition based model for power cable bellows discharge

Wang

Yang

et al. 2023

COMPEL

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Purpose This paper aims at building a discharge model for the power cable bellows based on plasma energy deposition and analyzing the discharge ablation problem. Design/methodology/approach Aiming at the multiphysical mechanism of the discharge ablation process, a multiphysical field model based on plasma energy deposition is established to analyze the discharge characteristics of the power cable bellows. The electrostatic field, plasma characteristics, energy deposition and temperature field are analyzed. The discharge experiment is also carried out for result validation. Findings The physical mechanism of the bellows ablative effect caused by partial discharge is studied. The results show that the electric field intensity between the aluminum sheath and the buffer layer easily exceeds the pressure resistance value of air breakdown. On the plasma surface of the buffer layer, the electron density is about 4 × 1,019/m3, and the average temperature of electrons is about 3.5 eV. The energy deposition analysis using the Monte Carlo method shows that the electron range in the plasma is very short. The release will complete within 10 nm, and it only takes 0.1 s to increase the maximum temperature of the buffer layer to more than 1,000 K, thus causing various thermal effects. Originality/value Its physical process involves the distortion of electric field, formation of plasma, energy deposition of electrons, and abrupt change of temperature field.

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“…Partial discharge, grounding current, temperature rise, etc., are usually used as evaluating indicators for on-line monitoring to assess the condition and predict the life of cables [5,6]. Among various cable on-line monitoring methods, temperature monitoring is the most direct method to reflect the condition of the cable.…”

Section: Introductionmentioning

confidence: 99%

Research on Temperature Monitoring Method of Cable on 10 kV Railway Power Transmission Lines Based on Distributed Temperature Sensor

2021

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Railway power transmission lines (RPTL) are power lines that provide nontraction power supply for railways, such as communications and signals along the railway. With the advancement of technology, power cables are being used more and more widely. Operational experience has shown that during the operation of power cables, abnormal heat is often caused by fault factors such as poor joint crimping and severe partial discharge caused by insulation defects, leading to cable burns in extreme cases. Distributed temperature sensors (DTS), a kind of spatial continuous temperature sensor using sensing optical fiber, can measure the temperature along the cable and are expected to realize on-line monitoring and positioning of cable heating faults. This paper first builds a finite element model of the cable under various faults to calculate the distribution characteristics of the temperature field of the faulty cable. Then the results are verified through experiments with the external sensing fiber and the artificially manufactured heating points of the cable. The conclusions show that it is feasible to use a distributed sensing fiber to monitor and locate the heating fault of power cable.

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Statistical Analysis of Partial Discharge Faults of HV Cables

Cited by 6 publications

References 2 publications

Conductor Temperature Monitoring of High-Voltage Cables Based on Electromagnetic-Thermal Coupling Temperature Analysis

Conductor Temperature Monitoring of High-Voltage Cables Based on Electromagnetic-Thermal Coupling Temperature Analysis

A plasma energy deposition based model for power cable bellows discharge

Research on Temperature Monitoring Method of Cable on 10 kV Railway Power Transmission Lines Based on Distributed Temperature Sensor

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