Issues and Challenges for HVDC Extruded Cable Systems

Mazzanti, G.

doi:10.3390/en14154504

Cited by 46 publications

(45 citation statements)

References 128 publications

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“…HVDC cable interties, the best option for long-distance power transmission across the sea since the 1950s [3], are now becoming interesting also for power transmission across the mainland, as witnessed by the huge German Corridors Project in Europe [4]. This renewed interest for HVDC cable systems in both land and submarine links stems from [5][6][7][8]:…”

Section: Introductionmentioning

confidence: 99%

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High voltage direct current transmission cables to help decarbonisation in Europe: Recent achievements and issues

Mazzanti

2022

High Voltage

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High Voltage Direct Current (HVDC) underground and submarine cables constitute an essential technology for the long‐distance transmission of renewable electrical power with low losses, thereby fostering decarbonisation. In the past 2 decades, all this yielded a quasi‐exponential rise of HVDC cable systems installed worldwide, but has also made the working conditions of HVDC cables harsher. In this paper, the contribution of HVDC cables to decarbonisation is tackled, with particular reference to the situation in Europe, and a few simple calculations showing in general terms the quantitative contribution provided by HVDC cable systems to decarbonisation are given. Then, the major issues towards long‐lasting and reliable HVDC cable systems are summarised briefly, focussing—for the sake of brevity—on the influence of the main HVDC cable technologies, of cable laying environment and of duty service. Some hints are also provided at the chances given by multiterminal HVDC systems.

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Section: Introductionmentioning

confidence: 99%

“…the chance of connecting huge Renewable Energy Sources (RES)—which lie frequently in remote locations from large consumption areas—to the grid, thereby fostering decarbonisation and green energy transition in a decisive way [6–8].…”

Section: Introductionmentioning

confidence: 99%

High voltage direct current transmission cables to help decarbonisation in Europe: Recent achievements and issues

Mazzanti

2022

High Voltage

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“…With the increasing demand for renewable sources of electricity generation, the development of high voltage direct current (HVDC) transmission technologies has been accelerated. However, the operational stability of the power cables needs to be emphasized as the voltage level rises [1,2]. It has been indicated that a high-voltage electric field combined with high temperatures may lead to thermal breakdown and ageing of insulation materials.…”

Section: Introductionmentioning

confidence: 99%

Polymer Composite with Enhanced Thermal Conductivity and Insulation Properties through Aligned Al2O3 Fiber

2022

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Thermoplastic polyolefins, such as polyethylene (PE), are traditionally one of the most widely used polymer classes with applications in the electric industry, and their nanocomposites have caught the interest of researchers. The linear filler is shown to be beneficial in decreasing the charge injection and hindering the formation of charge packs. So, we demonstrate a novel composite with excellent properties. The low-density polyethylene (LDPE) composite with aligned aluminum oxide (Al2O3) fiber has been prepared in electric field conditions. The direction of the Al2O3 fiber was parallel to the thickness direction of the LDPE composite. The breakdown strength of the Al2O3/LDPE composite with 0.2% aligned Al2O3 fiber was 498 kV/mm, which is higher than other fillers induced. The aligned Al2O3 fiber has effect on preventing accumulation of space charge and reducing the amount of free electron in the material. In addition, the thermal conductivity of the LDPE composite (0.22 W/m·K) was increased to 0.85 W/m·K when doped with 0.5 wt% aligned Al2O3 fiber. The present structure provides a new possibility for mass new nanocomposites with excellent microstructures and remarkable functionality.

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“…(iii) The charge generation in the model is limited, with only electron and hole being injected from electrodes. Impurities, such as crosslinking by-products and antioxidants [16,17], are unavoidable in the preparation process of polymeric insulation used in the HVDC extruded cable. The ionic carriers from the dissociation of impurities existing in polymeric insulation is another important source of space charge.…”

Section: Introductionmentioning

confidence: 99%

Influence of Polarity Reversal Period and Temperature Gradient on Space Charge Evolution and Electric Field Distribution in HVDC Extruded Cable

et al. 2022

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During the operation of HVDC extruded cables, voltage polarity reversal (VPR) is considered one of the most severe conditions for cable insulation. In this paper, a bipolar charge transport model developed for cylindrical geometry is improved by introducing ionic carriers from impurity dissociation for the simulation of space charge and electric field in an HVDC extruded cable with thick polymeric insulation under VPR, and the construction of the geometric model is based on a practical 160 kV DC polymeric cable. The influence of polarity reversal period (PRP) and temperature gradient (TG), formed by the load current flowing through the conductor, on the space charge evolution and the electric field distribution are investigated. The mechanisms of the charge dynamics and the field distortion affected by the PRP and the TG are also discussed. The results show that under TG, the maximum transient field appears near the interface between the conductor shield and insulation in the early stage of complete VPR. In addition, the longer the PRP, the more serious the maximum transient field distortion. Moreover, an increase in TG intensifies the maximum field distortion under steady and transient states due to the enhancement of heterocharge accumulation.

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Issues and Challenges for HVDC Extruded Cable Systems

Cited by 46 publications

References 128 publications

High voltage direct current transmission cables to help decarbonisation in Europe: Recent achievements and issues

High voltage direct current transmission cables to help decarbonisation in Europe: Recent achievements and issues

Polymer Composite with Enhanced Thermal Conductivity and Insulation Properties through Aligned Al2O3 Fiber

Influence of Polarity Reversal Period and Temperature Gradient on Space Charge Evolution and Electric Field Distribution in HVDC Extruded Cable

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