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Research on Earth Resistivity Measuring and Modeling of HVDC Deep-well Grounding Electrode Sites
2020
IEEE Access
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deep layer and the vicinity of the electrode, and the earth resistivity model of deep-well grounding electrode is obtained. ...
By comparing the on-site grounding resistance measurements of practical engineering application, it is found that the absolute error of the earth resistivity model obtained in this paper is 0.064 when ...
To sum up, this paper adopts a new idea to solve the problem of DC deep-well grounding electrode site resistivity survey.
III. HVDC DEEP-WELL GROUNDING ELECTRODE SITE RESISTIVITY SURVEY A. ...
doi:10.1109/access.2020.2968366
fatcat:6b2rk7vm3vhdlee6vdvyyqen7m
Adjustment of the geoelectric model for a ground electrode design – the case of the Rio Madeira HVDC transmission system, Brazil
2021
Zenodo
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Abstract: The two ground electrodes of the south end of the Rio Madeira HVDC transmission system are located within the volcanic-covered Paraná basin, SE Brazil. ...
The preliminary model is based on data acquired with shallow (electroresistivity) and deep (magnetotelluric) geophysical soundings. ...
Ground electrodes of HVDC transmission systems provide a low resistance current return path during both monopolar and bipolar operation, using the earth as the conductive medium. ...
doi:10.5281/zenodo.4608512
fatcat:vmfmwl3lxjen3mpcpucofmkmee
Rio Madeira HVDC System: Commissioning of the Ground Electrode for Bipole 2 at Porto Velho
2022
Applied Sciences
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For the confirmation of the new site, it was built in the central area of the site, a single-well 47 m deep test electrode, interconnected to the original 15 km electrode line by an additional 40 km long ...
However, the main objective of the paper is the evaluation of the electrode resistance, which is an essential HVDC electrode parameter. ...
Therefore, the design of an HVDC ground electrode requires the construction of a deep geoelectric model, which, in the case of a high-resistivity subsurface, will comprise half Earth's crust. ...
doi:10.3390/app12073279
doaj:c223e88ec8614d9ab0b28e83cea6898b
fatcat:fj6hhiguzzelnftennnkeesray
Long-term geomagnetically induced current observations in New Zealand: Earth return corrections and geomagnetic field driver
2017
Space Weather: The international journal of research and applications
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Currents of~30-50 A are observed, depending on the measurement location. ...
However, after correcting for Earth return operation, as described here, the New Zealand measurements provide an unusually long and spatially detailed set of geomagnetically induced current (GIC) measurements ...
This research was supported by the New Zealand Ministry of Business, Innovation and Employment Hazards and Infrastructure Research ...
doi:10.1002/2017sw001635
fatcat:kr56i5ic4vdmljfvxds7jbpwtu
Overview of Research Status of DC Bias and Its Suppression in Power Transformers
2022
Energies
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research on DC bias voltage and its suppression. ...
Finally, the current research on DC bias voltage of power transformers is summarized, and the progress and deficiencies of current research are pointed out, which has certain reference value for future ...
Research Status of the Generation Mechanism of DC Bias
Research on Transformer DC Bias Phenomenon Caused by Ground Current in HVDC Projects The research on the distribution mechanism of the ground current ...
doi:10.3390/en15238842
fatcat:mqqdqlzdmbgy7g2cwhrn55zu3u
Alternative Simplified Analytical Models for the Electric Field, in Shoreline Pond Electrode Preliminary Design, in the Case of HVDC Transmission Systems
2022
Energies
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the preliminary study to be conducted swiftly, giving satisfactory results about electric field gradient, ground potential rise and resistance to remote earth of electrodes stations for the near and far ...
In this research, a two-step modification of the CIGRE simplified model was proposed. ...
The authors are grateful to Spyridon Gialampidis for his work on the original text version.
Conflicts of Interest: The authors declare no conflict of interest. ...
doi:10.3390/en15176493
fatcat:4kshd7btvredbkg3t7tzlqrwoi
Evaluation, Analysis and Diagnosis for HVDC Transmission System Faults via Knowledge Graph under New Energy Systems Construction: A Critical Review
2022
Energies
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Based on the prior research on fault diagnosis methods of HVDC systems, this work comprehensively summarizes and analyzes the existing fault diagnosis methods from three different angles: fault type, fault ...
To ensure the operation reliability of the power grid and reduce the outage time, it is imperative to realize fault diagnosis of HVDC transmission systems in a short time. ...
The simulation model of VSC-HVDC can be divided into the device detailed model, device simplified model, variable resistance model, and average value model. ...
doi:10.3390/en15218031
fatcat:ljvg5vwhkjd4pm7wpr4kmtamzq
Issues and Challenges for HVDC Extruded Cable Systems
2021
Energies
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Therefore, the contribution this paper aims at giving is a systematic, comprehensive and updated summary of the main present and future issues and challenges that HVDC cable systems have to face to further ...
The topics covered in this review–treated in alphabetical order for the reader's convenience–are accessories, higher voltage and power, laying environment (submarine and underground cables), modeling, ...
Funding: This research received no external funding.
Conflicts of Interest: The authors declare no conflict of interest. ...
doi:10.3390/en14154504
fatcat:yi6cebrolvcjvdvh2xtarbaria
Hydrological Studies In India During Last Decade: A Review
2018
Proceedings of the Indian National Science Academy
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This article provides a glimpse of some of these studies carried out by Indian researchers in the last one decade in field of Geomagnetism and Aeronomy. ...
IAGA, the International Association of Geomagnetism and Aeronomy, one of the eight Associations of the IUGG, is dedicated to the promotion of international research cooperation in the field of Geomagnetism ...
Archana Bhattacharyya and B.R. Arora, and Drs. M. Ravi Kumar, Team-IIG, B.P.K. Patro, Kusumita Arora, and Gautam Rawat are gratefully acknowledged for providing valuable inputs for the article. ...
doi:10.16943/ptinsa/2018/49512
fatcat:o3fie6eynfhyznxbm2r4tzvtri
Table of Contents
2020
2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE)
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1084 Recommended volt ampere characteristics of MOA in the lightning invasion overvoltage calculation of UHV AC Substation and its influence on simulation results CHEN, Xiujuan IEEE 1085 Probability analysis ...
of system special operation mode in the lightning invasion overvoltage calculation of UHV AC Substation CHEN, Xiujuan ...
chain
Yang, Xiong;Li, Wendong;Wang, Chao;Jiang, Zhihui;Chen,
Mingyu;Zhang, Guanjun
IEEE
10142
Performance Testing and Analysis of HVDC Deep-well Grounding Electrode
Hu, Shangmao;Cai, Hansheng; ...
doi:10.1109/ichve49031.2020.9279428
fatcat:mrin4cgjy5frbgtbst7jnibwrm
The Role of Global/Regional Earth Conductivity Models in Natural Geomagnetic Hazard Mitigation
2019
Surveys in geophysics
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The strength of the GICs that flow through a transformer depends on multiple factors, including the spatiotemporal signature of the geomagnetic disturbance, the geometry and specifications of the power ...
The phenomena of extreme geomagnetic disturbances, including storms and substorms, and their effects on human activity are commonly referred to as geomagnetic hazards. ...
Slate, and the anonymous reviewer for their valuable comments on a draft manuscript. ...
doi:10.1007/s10712-019-09579-z
fatcat:n46p2lcqyzbfliq25lpojzpreu
The coming of Age of HVDC extruded power cables
2014
2014 IEEE Electrical Insulation Conference (EIC)
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The paper gives a personal perspective on the development of these cables and links it with the author's research over the last 30 years. ...
Techniques for measuring space charge and conduction are described and discussed in terms of how they might be used to quantify the state of a HVDC cable. ...
The peeling is 150 m and the earthed side of the sample is found on the left hand side where the measured charge is negative. On the right there are two positive peaks. ...
doi:10.1109/eic.2014.6869361
fatcat:cg3kxuyf2vb7da4t527gvnvzbu
Failure of submarine cables used in high‐voltage power transmission: Characteristics, mechanisms, key issues and prospects
2021
IET Generation, Transmission & Distribution
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This study reviews the failure of high-voltage submarine cables used in offshore power transmission and provides highlights of their failure characteristic, mechanisms, key issues and prospects. ...
Inevitably, the fault occurs in HV submarine cables that is different from that of an underground cable. External aggression remains the primary cause of faults, such as fishing and anchors. ...
Seasonal factors such as soil temperature, thermal resistivity of the soil and daily load cycles were considered in the electrothermal life model. ...
doi:10.1049/gtd2.12117
fatcat:54qntywp4zaybfjk6b6peh5kbe
Insulator aging tests with HVAC and HVDC excitation using the tracking wheel tester
2010
2010 International Conference on High Voltage Engineering and Application
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Site severity class The site severity class can be obtained from the surface deposit and dust gauge measurements [1] . ...
A measured NSDD value above 2 [ 2 cm mg ] requires an increase by one level for the site severity class. ...
doi:10.1109/ichve.2010.5640730
fatcat:44rhxhepkjfm5h4yqrpmfsqmni
Numerical simulation of the cathodic protection of pipeline networks under various stray current interferences
[chapter]
2005
Modelling of Cathodic Protection Systems
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The software can deal with all standard kinds of cathodic protection interferences as well as stray currents coming from other CP-installations, DC-traction systems, HVDC-transmission lines, grounding ...
As a result, the model gives the 'on' and 'off' potential along the pipe, the potential distribution in the soil, the axial currents flowing through the pipes as well as the radial current densities leaving ...
Also, a model can provide reference values for measurements on operational sites, that can help in the tracing and solving of any possible anomaly. ...
doi:10.2495/1-85312-889-9/08
fatcat:3so6dmvnrjgv7mutenqwulrdae
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