Power transmission with HVDC at voltages above 600 kV

Astrom, U.; Westman, Bo; Lescale, V.; Asplund, Gunnar

doi:10.1109/pesafr.2005.1611783

Cited by 12 publications

(4 citation statements)

References 1 publication

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“…The authors explained the importance of the HVDC transmission system and calculated the resistive and corona losses and the maximum electrical field stress on different conductor configurations. Similarly, other literature [12][13][14][15] also clarify the importance and advantages of HVDC transmission technology for renewable energy integration and bulk power transmission.…”

Section: Introductionmentioning

confidence: 93%

Technical and Economic Analysis of an HVDC Transmission System for Renewable Energy Connection in Afghanistan

et al. 2022

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Aged and insufficient domestic power plants and insecure, unreliable and expensive power imports pose significant challenges for the power sector of Afghanistan. On the other hand, due to the absence of a suitable transmission grid, the internal renewable energy resources are not adequately developed, despite their abundant resource potential throughout the country. This paper proposes a voltage source converter (VSC)-based high-voltage direct current (HVDC) transmission link to connect the Herat province in the west, which has huge solar and wind energy potential, to Kabul, the capital of the country and the main load center. A techno-economic analysis of this HVDC against high-voltage alternating current (HVAC) technology was performed to determine the suitability and effectiveness of the proposed transmission system. The active, reactive and corona losses were calculated as the technical parameters and the discounted cash flow (DCF) method was deployed to economically compare both technologies. The outcomes of the paper disclose that the implementation of this transmission project is techno-economically feasible, and can result in the energy security and economic stability of the country.

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Section: Introductionmentioning

confidence: 93%

Technical and Economic Analysis of an HVDC Transmission System for Renewable Energy Connection in Afghanistan

et al. 2022

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“…However, the big challenge that must be handled is that most of the hydro, solar, and wind sources are situated far from the urbanized areas, which means that the generated energy cost must be associated with the effective cost of the transmission system [ 1 ]. It is found that the use of a high voltage direct current (HVDC) system can reduce the energy losses to about 50% compared to the alternating current system (HVAC) [ 2 ]. For many cases, where the transmission system must be underground or crossing the sea (interconnection between countries for example), the use of the extruded cables with polymeric insulation presents a promising solution.…”

Section: Introductionmentioning

confidence: 99%

Effect of Isothermal Conditions on the Charge Trapping/Detrapping Parameters in e-Beam Irradiated Thermally Aged XLPE Insulation in SEM

et al. 2022

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The effect of isothermal conditions on the trapping/detrapping process of charges in e-beam irradiated thermally aged XLPE insulation in scanning electron microscopy (SEM) has been investigated. Different isothermal conditions ranging from room temperature to 120 °C are applied on both unaged and aged XLPE samples (2 mm thick) by a suitable arrangement associated with SEM. For each applied test temperature, leakage, and influence currents have been measured simultaneously during and after e-beam irradiation. Experimental results show a big difference between the fresh and aged material regarding trapping and detrapping behavior. It has been pointed out that in the unaged material deep traps govern the process, whereas the shallow traps take part in the aged one. Almost all obtained results reveal that the trapped charge decreases and then increases as the temperature increases for the unaged sample. A deflection temperature corresponding to a minimum is observed at 50 °C. However, for the aged material, the maximum trapped charge decreases continuously with increasing temperature, and the material seems to trap fewer charges under e-beam irradiation at high temperature. Furthermore, thermal aging leads to the occurrence of detrapping process at high temperatures even under e-beam irradiation, which explains the decrease with time evolution of trapped charge during this period. The recorded leakage current increases with increasing temperature for both cases with pronounced values for aged material. The effect of temperature and thermal aging on electrostatic influence factor (K) and total secondary electron emission yield (σ) were also studied.

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“…Because of the surge in energy demand and the rapid development of renewable energy, there is a growing demand for high-voltage direct-current (HVDC) technology to achieve efficient electric power transmission between power generation and power consumption [1][2][3][4]. Unlike high-voltage alternating-current (HVAC) cables, charges injected from conducting and semiconducting layers in HVDC cables easily accumulate within the insulating layer, resulting in space charges and causing electric filed distortion and electrical breakdown [5,6].…”

Section: Introductionmentioning

confidence: 99%

Polyethylene/Graphene Nanoplatelet Nanocomposite-Based Insulating Materials for Effective Reduction of Space Charge Accumulation in High-Voltage Direct-Current Cables

Park

Kim

Jung³

et al. 2019

Journal of Nanomaterials

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We have demonstrated a straightforward hydrophobic surface modification of graphene nanoplatelets (GNPs) through a defect-healing process to fabricate well-dispersed insulating low-density polyethylene (LDPE)/GNP nanocomposites and have confirmed their effective suppression of space charge accumulation. Without any organic modifiers, GNPs containing oxygen-based functional groups at the edges were successfully reduced at optimal high-temperature defect-healing condition and modified to have hydrophobic surface properties similar to those of the LDPE matrix. The degree of dispersion and the reproducibility of the mechanically melt-mixed LDPE/GNP nanocomposites were immediately analyzed by thickness-normalized optical absorption measurement. In the LDPE matrix, below the percolation threshold concentration, well-dispersed GNP fillers effectively acted as trapping sites under high electric fields, resulting in the successful suppression of packet-like space charge accumulation (field enhancement factor=1.04 @ 0.1 wt% LDPE/GNP nanocomposite).

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Power transmission with HVDC at voltages above 600 kV

Cited by 12 publications

References 1 publication

Technical and Economic Analysis of an HVDC Transmission System for Renewable Energy Connection in Afghanistan

Technical and Economic Analysis of an HVDC Transmission System for Renewable Energy Connection in Afghanistan

Effect of Isothermal Conditions on the Charge Trapping/Detrapping Parameters in e-Beam Irradiated Thermally Aged XLPE Insulation in SEM

Polyethylene/Graphene Nanoplatelet Nanocomposite-Based Insulating Materials for Effective Reduction of Space Charge Accumulation in High-Voltage Direct-Current Cables

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