Charge Transport in Full-Size HVDC Cable Joint with Modeling of XLPE/EPDM Interface

Wang, Yani; Wang, Yalin; Yang, Xingwu; Ma, Aiqin; Sun, Yuanyuan; Yin, Yi

doi:10.1109/tdei.2021.009635

Cited by 11 publications

(7 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The charge behavior at the electrode/dielectric interface region can be obtained by detecting the surface potential using the probe microscopy method. [87,89] Figure 12a shows the surface topography of the polyetherimide (PEI)/PCBM (A kind of molecular semiconductor, ( [6,6]-Phenyl C61 butyric acid methyl ester)) composite near the electrode/dielectric contact region. [211] The height of the Al electrode formed on the substrate by vacuum deposition technology is higher than that of the composite.…”

Section: Charge Characteristics At Electrode/dielectric Interfacementioning

confidence: 99%

“…Interfaces created by solid–solid and solid–liquid polymer dielectrics have been widely used in advanced electronic devices and power equipment ( Figure ), [ 1–5 ] including multi‐layered dielectric contact regions in high voltage cables, [ 6–9 ] winding and dielectric contact regions in solid‐state transformers, [ 10 ] and filler/matrix contacts in composite materials for electronic device packaging. [ 11 ] Under the electric field, the interface charges are formed within various regions, indicating an improvement in electro‐acoustic, [ 12 ] electro‐optic, [ 13 ] and electro‐thermo [ 14 ] conversions in the flexible transducers.…”

Section: Introductionmentioning

confidence: 99%

“…These interface charges play a dominate role in the performance of the insulation system. [16,21] For example, interface charges at the oil/paper, [22][23][24][25][26][27] and cross-linked polyethylene (XLPE)/ethylene propylene diene monomer (EPDM) structure, [6,8,28] cause the electric field enhancement, indicating the degradation of the power transformers and cables in high voltage direct current (HVDC) power applications. [16,29,30] Electrode/polymer interfaces exhibit charge injection, extraction [31,32] and electroluminescence, [33,34] leading to undesired electric field changes and discharge.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Interface Charge Characteristics in Polymer Dielectric Contacts: Analysis of Acoustic Approach and Probe Microscopy

Wang

et al. 2023

Adv Materials Inter

View full text Add to dashboard Cite

Interfaces are essential components in polymer contact systems, which widely exist in electronic devices and power equipment. Interface charge originating from the mismatch of the electronic structure in interfaces is one of the key issues to modify the device performance due to its multifunctional migration and accumulation behaviors. Hence, the detection and analysis of the interface charge characteristics are of great importance to deeply understand the polymer contact system in various devices. This paper presents an overview of recent research progress in the interface charge properties at dielectric interfaces. Based on the theoretical analysis of the MWS polarization and electronic localized states, two typical approaches of discussing the interface charges from micrometer to millimeter are mainly studied. Acoustic method is prevalent in detecting the space charge in various dielectrics. However, owing to its limited resolution (several µm), it is difficult to clarify the charge distributions at the interface with a micro‐scale. Probe microscopy presents a promising technique due to its flexible surface potential detection at a submicron scale. The challenges and prospects of acoustic and probe microscopy methods are discussed in this paper. The advanced techniques of interface charges can promote the development of new energy electronic devices.

show abstract

Section: Charge Characteristics At Electrode/dielectric Interfacementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Interface Charge Characteristics in Polymer Dielectric Contacts: Analysis of Acoustic Approach and Probe Microscopy

Wang

et al. 2023

Adv Materials Inter

View full text Add to dashboard Cite

show abstract

“…For that, finite element modelling is used and the accuracy of the modelling is driven primarily by the correctness of conductivity data provided to the model. Several recent works treat modelling of the field distribution in joints, including the transient states [5] [17] [28]. Also, modelling can be used to determine optimal properties of materials for field homogenization, being insulations or field grading layers [29].…”

Section: Field Distribution In Multi-dielectricsmentioning

confidence: 99%

“…However, correct identification and parameterization of the different processes at play is extremely tedious. The application of such model to cable joints is attempted [5], but there is still lot to be done for this parameterization combining differential insulating materials and possibly specific trapping behavior at the interfaces.…”

Section: Introductionmentioning

confidence: 99%

Insulating Materials for HVDC Cable Accessories: Effects on the Electric Field in Nonstationary Situations

Teyssèdre¹,

Roy³

2022

IEEE Electr. Insul. Mag.

View full text Add to dashboard Cite

With the move to DC technologies for power transmission, the computation of the field distribution in insulations has become a tricky task as the materials response is less well mastered as under ac stress. This is true for HVDC cables where essentially the conductivity law must be identified for the used insulating material. Cables represent a relatively simple case study. Accessories as cable joints and terminations are certainly more delicate to address. First, more than one material has to be handled; second the translational symmetry is broken, and tangential fields have to be computed in a situation of inhomogeneous temperature conditions. Finally, non-stationary situations have to be managed and modelled for accounting for on-line operations as well as surges seen by cables. Our purpose in this work is to give an overview on how far these transient phenomena are handled in the literature and to demonstrate how far the electrical as well as thermal properties of materials actually determine the field distributions.

show abstract

Space charge characteristics in epoxy/nano-MgO composites: Experiment and two-dimensional model simulation

Liu

Xie

et al. 2022

Journal of Applied Physics

View full text Add to dashboard Cite

Space charge accumulation in polymer dielectrics may lead to serious electric field distortion and even insulation failure during long-term operations of power equipment and electronic devices, especially under conditions of high temperature and direct current electric stress. The addition of nanoparticles into polymer matrices has been found effective in suppressing space charge accumulation and alleviating electric field distortion issues. Yet, the underlying mechanisms of nanoparticle doping remain a challenge to explore, especially from multi-dimensional composite insights. Here, a two-dimensional bipolar charge transport model with consideration of interface zones between organic/inorganic phases is proposed for the investigation into space charge behaviors of nanodielectrics. To validate the effectiveness and feasibility of the model, pulsed electroacoustic experiments are performed on epoxy/nano-MgO composites with different doping ratios of nanoparticles. Experimental observations match well with simulation anticipations, i.e., higher doping ratios of nanoparticles below the percolation threshold exhibit better capabilities to inhibit space charge accumulation. The deep traps (∼1.50 eV) generated in the interface zones are demonstrated to capture free charges, forming a reverse electric field in the region adjacent to electrodes and impeding the space charge migration toward the interior of the composite. This model is anticipated to provide theoretical insight for understanding space charge characteristics in polymer nanodielectrics and computing charge dynamics in extreme conditions where experiments are challenging to perform.

show abstract

Charge Transport in Full-Size HVDC Cable Joint with Modeling of XLPE/EPDM Interface

Cited by 11 publications

References 22 publications

Interface Charge Characteristics in Polymer Dielectric Contacts: Analysis of Acoustic Approach and Probe Microscopy

Interface Charge Characteristics in Polymer Dielectric Contacts: Analysis of Acoustic Approach and Probe Microscopy

Insulating Materials for HVDC Cable Accessories: Effects on the Electric Field in Nonstationary Situations

Space charge characteristics in epoxy/nano-MgO composites: Experiment and two-dimensional model simulation

Contact Info

Product

Resources

About