A Review of Methods and Associated Models used in Return Voltage Measurement

Mustafa, Ehtasham; Afia, Ramy S. A.; Adam, Tamus Zoltan

doi:10.1109/diagnostika.2018.8526127

Cited by 10 publications

(4 citation statements)

References 23 publications

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“…The EVR is an advanced form of the voltage response method, which has been established in recent times. The method has shown its ability to study the slow dielectric polarization processes which have high time-constants inside the material while having successfully been implemented on LV distribution cables, high voltage cables, and transformer insulations [31][32][33][34][35]. The EVR measurement of under the investigated cable samples was carried out by charging the cable for 4000 seconds (tch) at 1000 V DC voltage (Vch) by closing the switch SW1, Fig.…”

Section: ) Extended Voltage Responsementioning

confidence: 99%

Application of Non-Destructive Condition Monitoring Techniques on Irradiated Low Voltage Unshielded Nuclear Power Cables

2020

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In this paper, the effect of radiation stress on the overall degradation of jacket and insulation of low voltage unshielded power cable used in nuclear power plants is discussed. The XLPE insulated and CSPE jacketed cable samples were exposed to a total dose of 400 kGy γ-irradiation with 0.5 kGy/h dose-rate. Dielectric spectroscopy; complex permittivity, and extended voltage response; namely slopes of decay and return voltages were used to study the effect of the irradiation on the cable with an aim to establish the application of these techniques for a non-destructive condition monitoring of the unshielded cables. Shore D hardness was also used to investigate the mechanical characteristic of the cable. It was observed that the radiation stress affected the electrical and mechanical properties of the cable polymeric components i.e. insulation and jacket. The imaginary part of permittivity at low frequency; 100 Hz, the slope of return voltage, and hardness showed a significant increase with absorbed dose showing the effect of irradiation on the jacket and insulating material, as well. A strong correlation was observed between the imaginary part of permittivity at 100 Hz, slopes of return voltage, and hardness. The results show the dielectric measurement techniques are potential non-destructive condition monitoring methods for the unshielded low voltage nuclear power plant power cables for on-site diagnosis.

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Section: ) Extended Voltage Responsementioning

confidence: 99%

Application of Non-Destructive Condition Monitoring Techniques on Irradiated Low Voltage Unshielded Nuclear Power Cables

2020

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“…Till now, a few techniques have been investigated for LV cables such as Line Resonance Analysis (LIRA), Time Domain Reflectometer (TDR), Voltage Return, dielectric spectroscopy and loss factor [12][13][14][15]38]. The techniques have been adopted to study the dissipation factor (tanδ), polarization, permittivity and susceptibility of the material [16,[39][40][41][42][43][44]. The effect of the uncertainties during the thermal-radiation accelerated aging tests on the electrical properties have also been reported and are discussed here.…”

Section: Electrical Propertiesmentioning

confidence: 99%

Condition Monitoring Uncertainties and Thermal - Radiation Multistress Accelerated Aging Tests for Nuclear Power Plant Cables: A Review

Mustafa

Afia

Tamus

2019

Period. Polytech. Elec. Eng. Comp. Sci.

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The low voltage cables in the nuclear power plant have the same importance as veins have in the human body. Since, the cables inside the containment are under a number of environmental stress, out which the thermal and radiation stresses are important and become more effective with the presence of oxygen. These stresses cause the degradation of the insulation and hence may lead to insulation failure. To study the behavior of the cables under the nuclear power plant environmental stress, the cables are subjected to accelerated aging tests in laboratories which helps in determining their withstand capacity and degradation behavior in the harsh thermal-radiation environment. In this paper, the accelerated aging tests conditions are discussed with the focus on the role of certain uncertainty factors which effect the aging markers during the condition monitoring of the insulation material of cable after the accelerated aging tests. This review has been put into a framework to better understand the aging process in the low voltage nuclear power plant cables. In the conclusion part, some future directions in the field of the thermal-radiation multi-stress accelerated aging tests and condition monitoring techniques are also identified.

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“…In the time domain analysis, measurement of return voltage is one such technique, with the main idea behind the technique to study the slow dielectric polarization processes, possessing high time constants, higher than 1 sec [10]. Two new techniques emerged from this idea, Voltage Response (VR) and Return Voltage Measurement (RVM) method [11]. Both the methods have been adopted successfully for the condition monitoring of a wide range of the insulating materials.…”

Section: Extended Voltage Responsementioning

confidence: 99%

Thermal Degradation and Condition Monitoring of Low Voltage Power Cables in Nuclear Power Industry

Mustafa

Adam

Afia

et al. 2019

IFIP Advances in Information and Communication Technology

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A strong electric power industry having diverse generation sources is a key for advances in the industry, agriculture, technology and standards of living for any nation. In the last few decades, the nuclear power industry has emerged as a strong competitor in the electric power production market due to its less carbon oxide emission, high capacity, and efficiency. The reliable operation of nuclear power plants is heavily dependent on the safe operation of the low voltage instrumentation and control and power cables, which are mostly installed in the containment area and are under thermal and radiation stresses which may decrease the expected life of the cable. In this research work, the behavior of Choloro-Sulfonated Polyethylene /Cross-Linked Polyethylene based low voltage nuclear power plant power cable samples under thermal stress have been studied with the help of non-destructive extended voltage response method. The effect of the thermal stress on the expected life of the cable are also discussed.

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A Review of Methods and Associated Models used in Return Voltage Measurement

Cited by 10 publications

References 23 publications

Application of Non-Destructive Condition Monitoring Techniques on Irradiated Low Voltage Unshielded Nuclear Power Cables

Application of Non-Destructive Condition Monitoring Techniques on Irradiated Low Voltage Unshielded Nuclear Power Cables

Condition Monitoring Uncertainties and Thermal - Radiation Multistress Accelerated Aging Tests for Nuclear Power Plant Cables: A Review

Thermal Degradation and Condition Monitoring of Low Voltage Power Cables in Nuclear Power Industry

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