Results 51 to 60 of about 1,710 (215)
Tracking wheel test for DC polymeric insulators [PDF]
, 2011 Il lavoro di tesi svolto è atto ad apportare delle migliorie nel sistema di trasmissione HVDC (High Voltage Direct Current). Un elemento problematico per le linee aeree HVDC è dato dagli isolatori, questa situazione si aggrava particolarmente nel caso in
Gazzola, Alice
core
Study of electric field and ion effects on HVDC lines [PDF]
, 1980 Progress is reported in research on the electric field and ion effects of bipolar HVDC transmission lines with voltages up to 1500 kV and on the space charge generation characteristics of different types of conductors for HVDC transmission ...
Comber, M.G., Johnson, G.B.
core +1 more source
Application of Deep Learning in Virtual Power Plants—A Review
Energy Internet, EarlyView.ABSTRACT The advancement of deep learning (DL) has substantially improved the power grid’s ability to model and optimise diverse and highly complex tasks. Although intelligent transformation is an inevitable trend, traditional approaches increasingly reveal limitations in computational efficiency, nonlinear nonconvex optimisation, and multi‐layer ...
Hongjie Zhu +7 more
wiley +1 more source
Long‐term statistics of corona loss of HVDC transmission line
The Journal of Engineering, 2019 Corona loss is one of the electromagnetic environment parameters of high‐voltage direct current (HVDC) transmission lines. So far many countries have carried out researches and measurements on it. In 2008, UHVDC test lines were established in the National Engineering Laboratory for UHV Technology (Kunming) at the altitude about 2100 m.
Zhanqing Yu +4 more
openaire +2 more sources
Dynamic Behaviour of Bubbles in Oil Under Electrothermal Ageing
High Voltage, EarlyView.ABSTRACT During long‐term operation of converter transformers, the internal oil–pressboard insulation undergoes irreversible degradation. Partial discharge in the weakened insulation will cause the formation of a large number of bubbles in the insulating oil.
Hongbin Wu +7 more
wiley +1 more source
Fault Identification of DC Transmission Lines Based on Energy Ratio Analysis
Zhongguo dianli, 2020 HVDC transmission lines, being long in distance and crossing complex natural environments, are prone to lightning and short to ground faults. Aiming at this problem, a novel fault identification method is proposed based on energy ratio.
Peng ZHU +9 more
doaj +1 more source
Development of ± 550 kV DC GIS Basin Insulator
High Voltage, EarlyView.ABSTRACT The basin insulator is a core component of the insulation system for ± 550 kV gas‐insulated switchgear (GIS). This paper, using a finite element method for multi‐physics simulations of electric–thermal coupling, determines a geometry suitable for the industrial production of ± 550 kV GIS basin insulators.
Shaohua Cao +9 more
wiley +1 more source
Protection of ultra long HVDC transmission lines. [PDF]
, 2005 Thesis (M.Sc.Eng.)-University of KwaZulu-Natal, Durban, 2005.HVDC transmission is today widely used in modem Power Systems as an alternative to HVAC. Current trends indicate that many future conventional HVDC systems will be systems of increasing power
Naidoo, Divoloshanan.
core
High Voltage, EarlyView.ABSTRACT The problem of gas–solid interface charge accumulation is an important reason for distorting the surface electric field and then inducing surface discharge. The temperature gradient distribution formed on the spacer during the operation of a gas‐insulated transmission line (GIL) will aggravate the surface charge accumulation, further ...
Jianyi Xue +6 more
wiley +1 more source
High Voltage, EarlyView.ABSTRACT To effectively suppress transient overvoltages in HVDC systems, the design and experimental validation of a multi‐module series controllable arrester are presented. The voltage‐limiting performance, series voltage equalisation capability, and robustness under fault conditions in high‐voltage scenarios require further research.
Tai Yang +4 more
wiley +1 more source