Results 31 to 40 of about 1,581 (183)
Variance‐Empirical Mode Decomposition Method for Fault Detection in MMC‐HVDC Transmission Lines
Energy Science &Engineering, EarlyView.A variance‐embedded empirical mode decomposition (VEMD) method is proposed for fast and accurate fault detection in MMC‐HVDC transmission lines. By combining variance analysis with EMD, the method reliably detects various faults without communication links and remains robust to noise and non‐fault transients.
Seyed Amir Hosseini, Behrooz Taheri
wiley +1 more source
IEEE Access, 2019 Voltage Source Converter based High Voltage Direct Current (VSC HVDC) technology is used more and more in modern power systems. Consequently, in the ac network, an increasing number of converters are appearing in mutual electrical proximity, thus forming
Goran Grdenic +2 more
doaj +1 more source
Optimal Data-Driven Control of an LCC HVDC System for Real-Time Grid Frequency Regulation
IEEE Access, 2020 Recent advances in data sensing and processing technologies enable data-driven control of high-voltage direct-current (HVDC) systems for improving the operational stability of interfacing power grids.
Do-Hoon Kwon, Young-Jin Kim
doaj +1 more source
Energy Science &Engineering, EarlyView.A real‐time power quality disturbance generator is developed using virtual instrumentation based on LabVIEW and NI MyDAQ. The system generates IEEE‐standard PQ events with controllable noise and harmonics. Measurement uncertainty analysis confirms its reliability for realistic testing of Power Quality Disturbance detection and classification algorithms.
Abdullah Saud +5 more
wiley +1 more source
Evolution of the HVDC Link Connecting Offshore Wind Farms to Onshore Power Systems
Energies, 2020 This paper presents an overview of the DC link development and evolution dedicated to HVDC structure for connecting offshore wind power plants to onshore power systems.
Roland Ryndzionek, Łukasz Sienkiewicz
doaj +1 more source
System Identification of Classic HVDC Systems
SAIEE Africa Research Journal, 2011 Determining models from observations and studying the models' properties is essentially the functionality of science. Models attempt to link observations into some pattern. System identification is the art of building mathematical models of dynamic systems based on observed data from the systems.
L. Chetty, N.M. Ijumba
openaire +1 more source
Micro Partial Discharge Characteristics of SF6 Under DC Voltage
High Voltage, EarlyView.ABSTRACT In gas‐insulated high‐voltage direct current (HVDC) devices, micro partial discharges (PD) caused by micro‐protrusions or surface roughness on conductors or enclosures may not cause immediate insulation system failure due to their weak discharge intensity.
Geng Chen +4 more
wiley +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
Small-Signal stability analysis of MMC-HVDC system with saturated transformer
International Journal of Electrical Power & Energy SystemsTransformer saturation has a significant impact on the stability of HVDC systems. While traditional research has primarily focused on LCC-HVDC systems, studies on MMC systems remain limited. Given the anticipated dominance of MMC technology in the future,
Hanwen Wang +6 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