Temperature correction to dielectric modulus and activation energy prediction of oil-immersed cellulose insulation

J Liu, X Fan, Y Zhang, H Zheng… - IEEE Transactions on …, 2020 - ieeexplore.ieee.org
The dielectric modulus M*(ω) is used for studying the frequency domain response and
activation energy (E a) of transformer immersed cellulose insulation. Existing literatures …

Improved modular multilevel converter with output voltage boosting capability for medium voltage DC distribution system

R Mishra, KM Vaghasiya… - 2019 IEEE Industry …, 2019 - ieeexplore.ieee.org
Numerous promising features of Medium Voltage DC Distribution System (MVDC-DS) make
it highly probable that it would be extensively integrated with the future AC power grid to …

Advancement in transformer fault diagnosis technology

H Cao, C Zhou, Y Meng, J Shen, X Xie - Frontiers in Energy Research, 2024 - frontiersin.org
The transformer plays a critical role in maintaining the stability and smooth operation of the
entire power system, particularly in power transmission and distribution. The paper begins …

Condition assessment of power transformer insulation using short-duration time-domain dielectric spectroscopy measurement data

D Mishra, A Baral, N Haque… - IEEE Transactions on …, 2019 - ieeexplore.ieee.org
Utilities prefer noninvasive methods for assessing the condition of power transformer
insulation. Analysis of polarization–depolarization current (PDC) is one such popular …

Research on Charge Accumulation Characteristics by PEA Method and Q(t) Method

H Ren, T Takada, H Uehara, S Iwata… - IEEE Transactions on …, 2021 - ieeexplore.ieee.org
This article reports the evaluation system of the insulating properties based on the pulsed
electro-acoustic (PEA) method and the current integration charge Q (t) method. According to …

Assessing aging status and type of XLPE cable insulation with a graphic approach based on PDC measurement

K Zhou, H Yuan, Y Li, M Li, Z Li… - IEEE Transactions on …, 2022 - ieeexplore.ieee.org
The polarization and depolarization current (PDC) measurement has been widely used to
assess the aging degree of cross-linked polyethylene (XLPE) cables. However, the aging …

Two-stage residual lifespan prediction model for oil-paper insulation based on analysis of furfural and methanol in oil

J Liu, B Song, E Zhang, H Zhang… - IEEE Transactions on …, 2022 - ieeexplore.ieee.org
The applicability of existing single aging indicator-based lifespan prediction methods needs
further improvement during different aging stages. Considering the aforementioned …

Distinction between the contributions of ionized and injected charges in oil immersed paper

Y Wu, K Wu, C Cheng, R Su, Z Lv… - … on Dielectrics and …, 2021 - ieeexplore.ieee.org
This paper proposes a method of distinguishing the contributions of ionized and injected
charges to the charge transport in oil immersed paper in triple-layer and double-layer …

Molecular-level evaluation of ionic transport under external electric fields in biological dielectric liquids

L Dan, K Zhang, Z Huang, F Wang, Q Wang… - Journal of Molecular …, 2021 - Elsevier
Ionic conduction is a critical parameter to evaluate the electrical performance of biological
dielectric liquids. In this work, detailed molecular dynamics (MD) simulations were carried …

Detrapped charge-affected depolarization-current estimation using short-duration dielectric response for diagnosis of transformer insulation

CM Banerjee, A Baral… - IEEE Transactions on …, 2020 - ieeexplore.ieee.org
Analysis of detrapped charge [evaluated from polarization-depolarization current (PDC)] is
effective in carrying out insulation diagnosis. However, computation of detrapped charge …