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View article: Life Estimation of HVDC Cable Insulation under Load Cycles: from Macroscopic to Microscopic Charge Conduction Modelling
Life Estimation of HVDC Cable Insulation under Load Cycles: from Macroscopic to Microscopic Charge Conduction Modelling Open
This paper goes one step forward in the life estimation of HVDC cable insulation under load cycles by introducing for the first time a microscopic model of charge conduction and transport i.e., Bipolar Charge Transport BCT model for electr…
View article: Life Estimation of HVDC Extruded Cables Subjected to Extension of Qualification Test Conditions and Comparison with Prequalification Test Conditions
Life Estimation of HVDC Extruded Cables Subjected to Extension of Qualification Test Conditions and Comparison with Prequalification Test Conditions Open
The goal of this paper is to evaluate the life of HVDC extruded cables subjected to the extension of qualification test (EQT) load cycles, introduced by Cigrè Technical Brochure 852, as well as to compare the results thus obtained with tho…
View article: Space Charge Measurements on Flexible Factory Joints for HVDC Extruded Cables
Space Charge Measurements on Flexible Factory Joints for HVDC Extruded Cables Open
This paper describes the two space charge measurement campaigns on flexible factory joints for HVDC extruded submarine cables carried out in 2024 at Hellenic Cables, Greece, and Jiangsu Zhongtian, China, in the framework of the activities …
View article: Discussion on the Defects in HVDC Cables and Their Relation with the Occurrence of Partial Discharge Phenomena
Discussion on the Defects in HVDC Cables and Their Relation with the Occurrence of Partial Discharge Phenomena Open
Extruded cables for high voltage (HV) applications, particularly for HVDC systems, must be manufactured to a high standard to ensure their quality and design life. Any deficiencies or imperfections during the manufacturing processes can le…
View article: Polypropylene Copolymers and Blends for HVDC Cable Insulation: Initial Characterization and Pilot-scale Production
Polypropylene Copolymers and Blends for HVDC Cable Insulation: Initial Characterization and Pilot-scale Production Open
This paper introduces a preliminary characterization of polypropylene-based copolymers as well as a possible ternary blend as a candidate to be used for HVDC cable insulation in the framework of the European project NEWGEN (New GENeration …
View article: Characterization of Isotactic-Polypropylene-Based Compounds for HVDC Cable Insulation
Characterization of Isotactic-Polypropylene-Based Compounds for HVDC Cable Insulation Open
This paper aims at a preliminary characterization of isotactic-polypropylene-based blends as a candidate to be used for High-Voltage Direct Current HVDC cable insulation in the framework of the European project NEWGEN (New GENeration of HV…
View article: Screening of Suitable Random Copolymer Polypropylene Blends for HVDC Cable Insulation
Screening of Suitable Random Copolymer Polypropylene Blends for HVDC Cable Insulation Open
Polypropylene (PP) based thermoplastics offer an interesting alternative over cross-linked polyethylene (XLPE) for extruded HVDC cable insulation. In this study, a set of PP random copolymer-based blends are screened by dielectric characte…
View article: Life Estimation of HVDC Cables Subjected to Fast and Slow Polarity Reversals
Life Estimation of HVDC Cables Subjected to Fast and Slow Polarity Reversals Open
This paper aims at estimating the life of extruded HVDC cable insulation subjected to fast and slow voltage polarity reversals (VPRs). An ad hoc MATLAB code is used for the transient electric field simulation in the cable insulation thickn…
View article: Updates About the Horizon Europe NEWGEN Research Project for a New Generation of HVDC Insulation Materials, Cables and Systems
Updates About the Horizon Europe NEWGEN Research Project for a New Generation of HVDC Insulation Materials, Cables and Systems Open
This article describes the updates about the HEU NEWGEN research project1, after 18 months since its start. The NEWGEN project aims at developing and proofing a new generation of extruded HVDC cable systems, including not only novel insula…
View article: Bayes Inference of Structural Safety under Extreme Wind Loads Based upon a Peak-Over-Threshold Process of Exceedances
Bayes Inference of Structural Safety under Extreme Wind Loads Based upon a Peak-Over-Threshold Process of Exceedances Open
In the present paper, the process of estimating the important statistical properties of extreme wind loads on structures is investigated by considering the effect of large variability. In fact, for the safety design and operating condition…
View article: A Review on Wind Speed Extreme Values Modeling and Bayes Estimation for Wind Power Plant Design and Construction
A Review on Wind Speed Extreme Values Modeling and Bayes Estimation for Wind Power Plant Design and Construction Open
Rapid growth of the use of wind energy calls for a more careful representation of wind speed probability distribution, both for identification and estimation purposes. In particular, a key point of the above identification and estimation a…
View article: Electric Field Enhancement during Voltage Polarity Reversals in Lapped HVDC Cables
Electric Field Enhancement during Voltage Polarity Reversals in Lapped HVDC Cables Open
This paper aims at investigating the effect of fast and slow Voltage Polarity Reversals (VPRs) on the electric field distribution inside the insulation thickness of lapped cables. Two types of lapped cables, i.e., oil-filled cables and Mas…
View article: FEVER – Fem Electrothermal solVER: application to an HVDC joint
FEVER – Fem Electrothermal solVER: application to an HVDC joint Open
Modeling and simulation activities play a central role in the analysis and development of HVDC systems. For this purpose, reliable numerical tools for 2D and 3D simulations are needed. This paper focuses on the simulation of temperature an…
View article: Experimental Investigation of the Effect of Transient Overvoltages on XLPE-Insulated HVDC Cables
Experimental Investigation of the Effect of Transient Overvoltages on XLPE-Insulated HVDC Cables Open
HVDC cables are subject to several types of impulses superimposed on the rated DC voltage during their service lifetime. Temporary Overvoltages (TOVs) and Superimposed Switching impulses (SSIs) are considered some of the most challenging d…
View article: Experimental Investigation of the Effect of Transient Overvoltages on XLPE-insulated HVDC Cables
Experimental Investigation of the Effect of Transient Overvoltages on XLPE-insulated HVDC Cables Open
HVDC cables are subject to several types of impulses superimposed on the rated DC voltage during their service lifetime. Temporary Overvoltages TOVs and Superimposed Switching impulses SSIs are considered some of the most challenging due t…
View article: Experimental Investigation of the Effect of Transient Overvoltages on XLPE-insulated HVDC Cables
Experimental Investigation of the Effect of Transient Overvoltages on XLPE-insulated HVDC Cables Open
HVDC cables are subject to several types of impulses superimposed on the rated DC voltage during their service lifetime. Temporary Overvoltages TOVs and Superimposed Switching impulses SSIs are considered some of the most challenging due t…
View article: Experimental Investigation of the Effect of Transient Overvoltages on XLPE-insulated HVDC Cables
Experimental Investigation of the Effect of Transient Overvoltages on XLPE-insulated HVDC Cables Open
HVDC cables are subject to several types of impulses superimposed on the rated DC voltage during their service lifetime. Temporary Overvoltages TOVs and Superimposed Switching impulses SSIs are considered some of the most challenging due t…
View article: Life-Based Geometric Design of HVDC Cables—Part 2: Effect of Electrical and Thermal Transients
Life-Based Geometric Design of HVDC Cables—Part 2: Effect of Electrical and Thermal Transients Open
This study, in two parts, investigates the design of HVDC cables depending on electrothermal life modelling of the insulating material. The first part investigated the way in which different parameters affect the design of an HVDC cable in…
View article: Feasibility of Space Charge Measurements on HVDC Cable Joints: Study Group—IEEE DEIS Technical Committee “HVDC Cable and Systems:”
Feasibility of Space Charge Measurements on HVDC Cable Joints: Study Group—IEEE DEIS Technical Committee “HVDC Cable and Systems:” Open
This is the first time that the feasibility of space charge measurements on full-sized HVDC cable joints has been explicitly considered. In this article we also consider whether the PEA and TSM techniques could be used.
View article: Innovative Development and Application of a Stress-Strength Model for Reliability Estimation of Aged LV Cables for Nuclear Power Plants
Innovative Development and Application of a Stress-Strength Model for Reliability Estimation of Aged LV Cables for Nuclear Power Plants Open
As a part of the H2020 EU Project called “TeaM Cables” - which has, among its aims, modelling reliability of nuclear power plant cables - the goal of this paper is to develop a model for the prediction of residual reliability of low voltag…
View article: The Effect of Insulation Characteristics on Thermal Instability in HVDC Extruded Cables
The Effect of Insulation Characteristics on Thermal Instability in HVDC Extruded Cables Open
This paper aims at studying the effect of cable characteristics on the thermal instability of 320 kV and 500 kV Cross-Linked Polyethylene XLPE-insulated high voltage direct-current (HVDC) cables buried in soil for different values of the a…
View article: The Effects of Transient Overvoltages on the Reliability of HVDC Extruded Cables. Part 1: Long Temporary Overvoltages
The Effects of Transient Overvoltages on the Reliability of HVDC Extruded Cables. Part 1: Long Temporary Overvoltages Open
Extensive simulations have been carried out of transient voltages superimposed onto the DC voltage of HVDC cable transmission systems. With the advent of VSC HVDC cable systems, attention has turned to long Temporary Overvoltages in such s…
View article: The Effects of Transient Overvoltages on the Reliability of HVDC Extruded Cables. Part 2: Superimposed Switching Impulses
The Effects of Transient Overvoltages on the Reliability of HVDC Extruded Cables. Part 2: Superimposed Switching Impulses Open
In a previous paper (Part 1) the authors have performed the simulative evaluation of the life lost by HVDC extruded cables subjected to long TOVs occurring in VSC HVDC cable systems. The conclusions were that it cannot be completely ruled …
View article: Forecasting the Reliability of Components Subjected to Harmonics Generated by Power Electronic Converters
Forecasting the Reliability of Components Subjected to Harmonics Generated by Power Electronic Converters Open
This paper aims at refining an experimentally based reliability model for the insulation of power components subjected to the randomly varying harmonics generated by power electronic converters. Compared to previous papers of the same auth…
View article: Preliminary Development and Application of a Stress-Strength Model for Reliability Estimation of Aged LV Cables for Nuclear Power Plants
Preliminary Development and Application of a Stress-Strength Model for Reliability Estimation of Aged LV Cables for Nuclear Power Plants Open
As a part of the H2020 EU Project called “TeaM Cables” - which has, among its aims, modelling reliability of Nuclear Power Plant (NPP) cables - the goal of this paper is to develop a model for the prediction of the residual reliability of …