Partial discharge activity in polymeric cable insulation under high voltage AC and DC

Morris, E. O.; Siew, W.H.

doi:10.1109/upec.2017.8231907

Cited by 9 publications

(6 citation statements)

References 13 publications

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“…From these diagrams, it is evident that their character corresponds with the internal partial discharges. There are also very well visible the movements of the "rabbit ear" [70] during the changes of the applied voltage, which are indicators for void [71] partial discharges. The difference in discharge activity could be attributed to the strong inhomogeneity of the internal structure or imperfect adhesion between the various parts of commonly used composite materials.…”

Section: Partial Discharges Measurementmentioning

confidence: 91%

Synthesis and Diagnostics of Nanostructured Micaless Microcomposite as a Prospective Insulation Material for Rotating Machines

et al. 2019

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This paper deals with the topic of composite insulation materials for rotating machines and it is primarily pointed to the synthesis of new three-component insulation system. In connection with this research, the basic components of the insulation system are selected and described by different diagnostic methods. The proposed insulation material is composed of epoxy resin based on bisphenol-A diglycidyl ether, magnesium oxide nanofiller (1 wt %) with its own surface treatment technology using epoxysilane coupling agent ( γ -glycidoxypropyltrimethoxysilane) and polyethylene naphthalate as a reinforcing component. Following the defined topic of the paper, the proposed three-component insulation system is confronted with commonly used insulating systems (PET reinforced and Glass reinforced mica composites) in order to verify the basic dielectric properties (dielectric strength, volume resistivity, dissipation factor) and other parameters determined from phenomenological voltage and current signals, respectively.

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Section: Partial Discharges Measurementmentioning

confidence: 91%

Synthesis and Diagnostics of Nanostructured Micaless Microcomposite as a Prospective Insulation Material for Rotating Machines

et al. 2019

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“…The method used for the creation and testing of the insulation samples has been used for AC testing on polyethylene terephthalate (PET) [10], and for AC and DC testing on LDPE to determine PDIV and PD amplitudes and time between PD pulses [11], [12]. Two polymers were tested.…”

Section: Methodsmentioning

confidence: 99%

Methods of Characterisation of DC Partial Discharge in Polymeric Cable Insulation

Morris

Siew

Given

2018

2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)

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Partial discharge monitoring is frequently used in AC cable systems, and there exists a strong desire for the same for DC cables within the electrical power industry, given their recent increased use. However, DC PD is a less well understood phenomenon. This paper provides analysis of three methods of partial discharge characterisation: pulse duration and amplitude analysis, frequency-domain spectra analysis, and partial discharge inception voltage analysis in artificially-created voids in polymeric cable insulation samples (polyethylene and polypropylene) under both AC and positive and negative DC excitations. From these a 'finger-print' of the defects can be determined based on the distribution of energy within the discharge frequency spectrum, and the inception voltage.

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“…In transient voltage conditions, the voltage across the cavity increases as a result of the high overvoltage which leads to a significant increase in the PD magnitude. Generally, DC discharges have negligible repetition (number of discharges), small in magnitude and low effective, so the applied voltage is considerably high [124].…”

Section: ) Under DC Voltagementioning

confidence: 99%

Ageing: Causes and Effects on the Reliability of Polypropylene Film Used for HVDC Capacitor

Umran

Wang

2020

IEEE Access

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It is well-known that the high-performance polymeric dielectric films used for high-voltage DC capacitors should have outstanding capabilities in terms of electrical and mechanical properties in order to face harsh operating conditions. Many factors limit the ability of these thin films to face different and growing stresses according to modern electrical requirements. Microstructure properties, additives, impurities, defects formed during manufacturing as well as applied stress types significantly affect the performance of dielectric films and their operational lifetime. This paper presents a comprehensive review of the factors which affect the ageing, degradation and breakdown of metallised polypropylene (PP) capacitors films. The effects of microstructure, surface morphological properties, mechanical properties and defects on the reliability of biaxially oriented polypropylene films (BOPP) are studied. In addition, the phenomena affecting dielectric performance and ageing mechanisms which are induced by electrical, thermal and electrothermal stresses are discussed.

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Partial discharge activity in polymeric cable insulation under high voltage AC and DC

Cited by 9 publications

References 13 publications

Synthesis and Diagnostics of Nanostructured Micaless Microcomposite as a Prospective Insulation Material for Rotating Machines

Synthesis and Diagnostics of Nanostructured Micaless Microcomposite as a Prospective Insulation Material for Rotating Machines

Methods of Characterisation of DC Partial Discharge in Polymeric Cable Insulation

Ageing: Causes and Effects on the Reliability of Polypropylene Film Used for HVDC Capacitor

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