Isolated vs. Interconnected Wind Turbine Grounding Systems: Effect on the Harmonic Grounding Impedance, Ground Potential Rise and Step Voltage

Šunjerga, Antonio; Li, Quanxin; Poljak, Dragan; Rubinstein, Marcos; Rachidi, Farhad

doi:10.1016/j.epsr.2019.04.010

Cited by 17 publications

(7 citation statements)

References 33 publications

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“…The leakage energy extraction and early warning device are used as conductors to form a circuit with the Earth. Among them, two electrodes are buried at different potential points while a step potential E k is formed between the electrodes (Kim et al, 2019;Sunjerga et al, 2019). According to the step voltage principle, current will be generated to supply power for the leakage energy extraction and early warning devices to realize passive self-start.…”

Section: Design Principle Of Leakage Energy Extractionmentioning

confidence: 99%

Power Leakage Monitoring and Warning Device for Power Grid Fault Diagnosis: Design and Field Test

Yang

Xie²,

Huang

2022

Front. Energy Res.

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Electrical equipment insulation damage, metal shell conduction on rainy days, and wire short circuits are easy to produce leakage, which form step voltage on the ground and endangers the life and safety of nearby personnel. In addition to the existing leakage protector, a new method is proposed to use leakage energy to obtain energy and early warning. The step voltage generated by the leakage current is collected through the electrode, which is rectified and reduced by the nano power LTC3588, while energy is stored in the supercapacitor for the superheterodyne transmitting module to send the leakage signal to the nearby receiving device. Based on the possibility of the superheterodyne transmitting module sending the leakage signal, it is judged whether leakage occurs here. The experimental results illustrate that when 10 mA leakage occurs in a 220 V wire, the electrode distance is 1.0 m, while the energy extraction device can obtain 360 MW of power for the superheterodyne transmitting module to send the leakage signal.

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Section: Design Principle Of Leakage Energy Extractionmentioning

confidence: 99%

Power Leakage Monitoring and Warning Device for Power Grid Fault Diagnosis: Design and Field Test

Yang

Xie²,

Huang

2022

Front. Energy Res.

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“…) − 2 + 3 − 2 16 2 ], for S<L (9) whatever, the calculation of ground resistance of grids nanotechnology grounding system is being as (10).…”

Section: Proposed Grounding Systemsmentioning

confidence: 99%

“…In case of a prospective fault current, step voltage, touch voltages and earth potential rise are kept below a safe limit. Thus, this may occur a change in soil characteristics (moisture, pH, and organics), corrosion, accelerated aging from lightning and earth current [6][7][8][9][10][11][12]. As a novel solution to these problems, nanotechnology soil has aimed to both increase soil conductivity and reduce corrosion.…”

Section: Introductionmentioning

confidence: 99%

Innovative earthing systems for electric power substations using conductive nanoparticles

Thabet

Mobarak

2021

IJECE

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The earthing system is very important to safe human’s lives and protect power system from normal and abnormal faults. High soil resistivity regions is the main problem of installation the earthing systems in electric power substations to pass the current through the earth's surface. This paper has been overcome on high soil resistivity regions by penetrating conductive nanoparticles to have extremely low grounding resistance. Moreover, it has been succeeded to examine the methodology of the proposed Nano-Tech earthing systems in case of single rods, multiple rods and grids. Also, it has been defined optimal types and concentrations of nanoparticles for Nano-Tech grounding system to provide excellence protection for electrical substations with respect to built beneath of soil where substation is located. A comparative study has been discussed and analyzed the results of traditional and nanotechnology grounding systems.

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“…A norma internacional (IEC 61400-24, 2019) recomenda a interligação dos sistemas de aterramentos individuais de cada turbina eólica com o intuito de reduzir a resistência de aterramento vista da base de cada torre do parque. Estudos recentes, no entanto, mostram que embora tal interligação reduza significativamente a resistência de aterramento (resposta de baixa frequência), o seu efeito na resposta frente a descargas atmosférica é bastante diferente (Sunjerga et al, 2019;Alipio et al, 2020). O presente trabalho tem o intuito de complementar esses estudos, avaliando o desempenho de sistemas interligados de aterramentos de aerogeradores frente a descargas atmosféricas.…”

Section: Introductionunclassified

Análise do Desempenho de Aterramentos Elétricos Interligados de Parques Eólicos frente a Descargas Atmosféricas: uma Avaliação Considerando Condições Típicas Brasileiras

Alípio

Barros

Passos

et al. 2020

Anais Do Simpósio Brasileiro De Sistemas Elétricos 2020

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Este trabalho investiga o comportamento impulsivo de sistemas de aterramentos interligados de parques eólicos, considerando condições típicas brasileiras. São considerados diferentes comprimentos de eletrodo que interligam os aterramentos de aerogeradores vizinhos, bem como uma ampla faixa de valores de resistividade do solo. De acordo com os resultados, a interligação entre os aterramentos de aerogeradores adjacentes pode levar a uma melhoria do desempenho impulsivo, com redução do valor de pico da elevação de potencial desenvolvida em resposta à injeção da corrente de descarga. A redução relativa do pico da elevação de potencial torna-se mais significativa com o aumento da resistividade do solo e é mais pronunciada para correntes mais lentas. Em todos os casos, a interligação leva a uma redução expressiva da resistência de aterramento vista por cada aerogerador individualmente.

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Isolated vs. Interconnected Wind Turbine Grounding Systems: Effect on the Harmonic Grounding Impedance, Ground Potential Rise and Step Voltage

Cited by 17 publications

References 33 publications

Power Leakage Monitoring and Warning Device for Power Grid Fault Diagnosis: Design and Field Test

Power Leakage Monitoring and Warning Device for Power Grid Fault Diagnosis: Design and Field Test

Innovative earthing systems for electric power substations using conductive nanoparticles

Análise do Desempenho de Aterramentos Elétricos Interligados de Parques Eólicos frente a Descargas Atmosféricas: uma Avaliação Considerando Condições Típicas Brasileiras

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