Results 61 to 70 of about 18,021 (222)
High Voltage, EarlyView.ABSTRACT The harmonic current and vibration of a converter transformer are effective pieces of information for detecting mechanical faults in the winding. In this paper, the ratio of vibration acceleration to the current squared is defined as the vibration frequency response function (VFRF) of the winding, and then, a novel online vibration frequency ...
Shuyu Wu, Fan Zhang, Shengchang Ji
wiley +1 more source
Operation characteristics of DC transmission system with large-scale renewable energy integration
The Journal of Engineering, 2018 Marked with flexible interconnection and control, the high-voltage direct current (HVDC) gird has captured much attention of industries and academics.
Minhui Qian +5 more
doaj +1 more source
Frontiers in Energy Research, 2023 In addition to the traditional long-distance and bulk power transmission application, the HVDC system can bring additional benefits to the system by providing ancillary service.
Qingshen Xu +3 more
doaj +1 more source
Partial discharge behavior under operational and anomalous conditions in HVDC systems [PDF]
, 2017 Power cables undergo various types of overstressing conditions during their operation that influence the integrity of their insulation systems. This causes accelerated ageing and might lead to their premature failure in severe cases.
Azizian Fard, M. +3 more
core +3 more sources
HVDC Transmission Line Protection Based on Transient Power
Procedia Technology, 2016 AbstractThis paper presents a new protection method for High Voltage Direct Current (HVDC) system based on transient power. Behavior of the HVDC system during fault is studied. Variation of transient power and the relation between various parameters of the line are analyzed during each fault.
Tom, Sherin, Thomas, Jaimol
openaire +1 more source
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
Overview of Research on Stability and Control of VSC-HVDC
发电技术, 2019 Voltage source converter based high voltage direct current (VSC-HVDC) transmission systems has the advantages of good active and reactive power control capability and more suitable for multi-terminal transmission system.
Mingzhe WU, Wuhui CHEN
doaj +1 more source
Development of three phase back to back converter with current flow control using raspberry Pi microcontroller [PDF]
, 2015 A High-Voltage Direct Current (HVDC) electric power transmission system uses direct current form the bulk transmission of electrical power, in contrast with the common Alternating Current (AC) systems.
Mamat, Ibrahim
core
, 2015 The problem of modeling and control of multi-terminal high-voltage direct-current transmission systems is addressed in this paper, which contains five main contributions.
Benchaib, Abdelkrim +2 more
core +3 more sources
Topology assessment for 3 + 3 terminal offshore DC grid considering DC fault management [PDF]
, 2014 Peer ...
Jovcic, Dragan +3 more
core +1 more source