HVDC Cables - The technology boost

Lagrotteria, Giuseppe; Pietribiasi, Davide; Marelli, Marco

doi:10.1109/aeit-hvdc.2019.8740645

Cited by 7 publications

(1 citation statement)

References 2 publications

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“…Many researches have been conducted in order to implement advanced and robust techniques to stabilize and guarantee better performances [5], either by classical proportional-integral (PI) controls [6] or by non-linear controls [7]- [9]. Recent work has focused on topics related to HVDC systems for example the integration of renewable energies in HVDC networks [10], the study and synchronization of converter stations [11], the technology of cables used for HVDC [12], [13], the ripple of capacitor voltages [14].…”

Section: Introductionmentioning

confidence: 99%

Modeling and design of an adaptive control for VSC-HVDC system under parameters uncertainties

Kazi

Majdoul

Machkour

2021

IJPEDS

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The growing demand for electricity and the increasing integration of clean energies into the electrical grids requires the multiplication and reinforcement of high-voltage direct current (HVDC) projects throughout the world and demonstrates the interest in this electricity transmission technology. The transmitting system of the voltage source converter-high-voltage direct current (VSC-HVDC) consists primarily of two converter stations that are connected by a dc cable. In this paper, a nonlinear control based on the backstepping approach is proposed to improve the dynamic performance of a VSC-HVDC transmission system, these transport systems are characterized by different complexities such as parametric uncertainties, coupled state variables, neglected dynamics, presents a very interesting research topic. Our contribution through adaptive control based on the backstepping approach allows regulating the direct current (DC) bus voltage and the active and reactive powers of the converter stations. Finally, the validity of the proposed control has been verified under various operating conditions by simulation in the MATLAB/Simulink environment.

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Section: Introductionmentioning

confidence: 99%

Modeling and design of an adaptive control for VSC-HVDC system under parameters uncertainties

Kazi

Majdoul

Machkour

2021

IJPEDS

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Electrical insulation performance of cross‐linked polyethylene/MgO nanocomposite material for ±320 kV high‐voltage direct‐current cables

et al. 2020

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Polymeric nanocomposite insulations are receiving the widespread attention of the electrical cable industry. This paper presents the electrical insulation performance of as‐received commercial 320 kV high‐voltage direct‐current (HVDC) cross‐linked polyethylene (XLPE)/MgO nanocomposite material with reference to the pure XLPE. The results of this commercial‐grade electrical insulation material are not reported hitherto. The scanning electron microscopy confirms the well‐dispersed nanofiller inside the polymer matrix. The DC electrical insulation performance is investigated by DC breakdown strength, space charge, DC electrical conductivity, and surface potential decay measurements. The test samples are subjected to the thermal aging at 135°C for 30 days. The un‐aged nanocomposite exhibits 20% higher DC breakdown strength, negligible hetero space charge accumulation, and the lower DC conductivity by one order than the un‐aged pure XLPE. Moreover, thermally aged nanocomposite shows more restraint to the deterioration of its properties. After the thermal aging, the DC breakdown strength decreased by 38% and 20% in the pure XLPE and its nanocomposite, respectively. Thermally aged nanocomposite shows negligible hetero charges and an increase in the DC conductivity by one order. However, the pure XLPE shows higher hetero charge accumulation and the increased DC conductivity by one order. In un‐aged XLPE nanocomposite higher crystallinity, higher deep trap density, and the lower carbonyl index are found to be the primary attributes of its improved performance. It is postulated that these significantly unchanged attributes can be the reason for the better anti‐thermal aging properties of the XLPE nanocomposite.

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