Results 81 to 90 of about 792,851 (265)
Deterioration Law of Mechanical Properties of Insulation Pressboard Under Multifield Coupled Ageing
High Voltage, EarlyView.ABSTRACT Converter transformers can experience progressive deterioration of their oil–pressboard insulation under elevated temperature, combined AC–DC electrical stress and persistent mechanical vibration. This study investigates how mechanical vibration affects the mechanical properties of insulation pressboard and clarifies the associated microscopic
Jiayi Chen +5 more
wiley +1 more source
Research on protection adaptability and optimization scheme of VSC/LCC DC parallel hybrid system
AIP Advances, 2023 With the continuous development of high-voltage direct current (HVDC) technology and the relative concentration of power load and power, the HVDC parallel hybrid system will inevitably appear again.
A. Ting Wang +5 more
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
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
Global Energy Interconnection, 2018 The diode rectifier unit (DRU)-based high-voltage DC (DRU-HVDC) system is a promising solution for offshore wind energy transmission thanks to its compact design, high efficiency, and strong reliability.
Rui Li, Lujie Yu, Lie Xu
doaj +1 more source
Impedance-compensated grid synchronisation for extending the stability range of weak grids with voltage source converters [PDF]
, 2016 This paper demonstrates how the range of stable power transfer in weak grids with voltage source converters (VSCs) can be extended by modifying the grid synchronisation mechanism of a conventional synchronous reference frame phase locked loop (PLL).
D'Arco, Salvatore +3 more
core +2 more sources
Reliability Improvement Strategies for HVDC Transmission System
Energy and Power Engineering, 2013 This paper analyses reliability data of HVDC systems of Southern China Power Grid. The weak links of HVDC systems’ operational reliability are DC control and protection, valve hall and valve cooling system and transmission lines. Some improvement measures and HVDC system reliability technology are proposed in this paper.
Yidong Hong, Tao Yu
openaire +1 more source
A Survey on HVDC Power Transmission Systems
Bilecik Şeyh Edebali Üniversitesi Fen Bilimleri Dergisi, 2020 Electric power is generated and transported globally by the means of an “Alternating Current” (AC) process. However, there are some applications in which “Direct Current” (DC) power transmission is superior to AC. Problems due to the lack of technology that provides good control and regulation for conversions of DC-to-AC and AC-to-DC hampered ...
Mahir KUTAY, Ahmad USMAN
openaire +3 more sources
High Voltage, EarlyView.ABSTRACT The stability analysis of Line Commutated Converter High Voltage Direct Current (LCC‐HVDC) is of considerable engineering importance. Establishing its analytical mathematical model helps to analyse stability and the factors that affect stability of the system.
Juanjuan Wang +6 more
wiley +1 more source
Engineering Reports, Volume 8, Issue 5, May 2026.Introducing a cascaded TI–TID secondary controller (SFO‐tuned) for a renewable‐integrated three‐area grid with HVDC and smart transformers modulating voltage‐dependent loads, achieving faster settling, lower overshoot, and robust frequency/tie‐line regulation under ±20% load changes versus conventional TI/TID baselines.
Sanjeev Kumar Bhagat +7 more
wiley +1 more source