Equivalent equation of earth resistance for ring electrode of wind turbine

Yasuda, Yoh; Fujii, Toshiaki

doi:10.1109/iclp.2010.7845823

Cited by 10 publications

(11 citation statements)

References 6 publications

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“…The design principles described in IEC 61400-24 [7] are based on IEC 62305-3 [17], which was initially designed for general structures consisting of houses and buildings [18]. The foundations of buildings are typically larger than WTG foundations, allowing long ring electrodes [19].…”

Section: Effectiveness Of Grounding Systemmentioning

confidence: 99%

Factors Determining the Effectiveness of a Wind Turbine Generator Lightning Protection System

Deshagoni

Auditore²,

Rayudu

et al. 2019

IEEE Trans. on Ind. Applicat.

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As a result of the growing supply and demand for wind power, wind turbine generators are increasingly being installed at sub-optimal sites that have high soil resistivity and high incidence of lightning strikes. This means that lightning protection systems for wind turbines are becoming a critical component of wind farm design. Not only do effective lightning protection systems ensure the safety of the physical wind turbine structure and human operators, they also protect the electrical and control systems installed inside wind turbine generators and safeguard the lives of human operators. This work presents a framework to assess the effectiveness of wind turbine lightning protection systems at the wind farm design phase. Performing the analysis at this early stage reduces lightning-induced downtime, which leads to increased energy yield. Our results show that the grounding system plays a critical role in the wind turbine lightning protection system. For this reason we also analyse various influential parameters of a grounding system design. We present results from full-wave electromagnetic simulations of the complete wind turbine grounding system, including the foundation.

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Section: Effectiveness Of Grounding Systemmentioning

confidence: 99%

Factors Determining the Effectiveness of a Wind Turbine Generator Lightning Protection System

Deshagoni

Auditore²,

Rayudu

et al. 2019

IEEE Trans. on Ind. Applicat.

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“…The footing resistance Rr was calculated from the guidelines proposed in [3] and [8]. The non-shielded low voltage (LV) cables connecting the WT LV panelboard to the low voltage side of the WT distribution transformer were modeled with a PI-equivalent model, one per phase and one additional copper conductor for earthing.…”

Section: A Rotor Blades Bearings and Towermentioning

confidence: 99%

“…16 kV) to the MV generator's stator and the tertiary side (0.575 kV) to the WT's LV network (Generator's rotor and auxiliary services) and depicted in Table VIII. The WT transformers were modeled as a BCTRAN element and the earthing systems of the WTs were galvanic connected to each other and firmly earthed [5], [8] and [9].…”

Section: E Low (Lv) Medium (Mv) and High Voltage (Hv) Movsmentioning

confidence: 99%

A simulation approach in electrostatic charging of rotor blades and its effects on transferred overvoltages in wind parks

Hernández¹,

Tsovilis²,

Asimakopoulou³

et al. 2014

2014 International Conference on Lightning Protection (ICLP)

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the aim of this paper is to present a theoretical approach of the hypothesis of electrostatic charging of rotor blades during storms and its effects on the lightning protection and overvoltage protection systems; taking into consideration the dimensions of multi-megawatt wind turbines and a particular electrical topology. Overvoltage and overcurrent in form of surges may be the result of electromagnetic traveling waves caused by lightning strikes, especially if the earthing (grounding) system of the wind turbines (WTs) is galvanic connected between each other in order to ensure a common earth potential in the wind park (WP). These effects may impose additional requirements for the reliable operation of the low voltage and medium voltage protection against surges.In Fig. 1 an example of extended electric discharges on a rotor blade root is depicted.

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“…Hence, there is still no general consensus regarding the adequate EMTP-type models of the WT grounding. One possible approach, which seems promising in this regard-although still not generally applicable-is presented in, e.g., [46].…”

Section: Wt Grounding Systemmentioning

confidence: 99%

A Review of Current Issues in State-of-Art of Wind Farm Overvoltage Protection

Sarajčev

Goić

2011

Energies

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This paper elaborates on several important outstanding issues in the state-of-art of overvoltage protection selection for modern wind farms. The lack of experience with this still-new technology, together with the inherent complexity of wind farm electrical systems, entails several unresolved issues pertinent to the topic of overvoltage protection, particularly in relation to lightning-initiated surges. Firstly, several aspects of the wind turbine lightning incidence, along with the issues related to the selection of lightning current parameters (pertinent to the wind farm overvoltage protection), are addressed in this paper. Secondly, several issues in the state-of-art models of the wind farm electrical systems-for the lightning surge analysis-are addressed and discussed. Here, a well-known ElectroMagnetic Transients Program (EMTP) software package is often employed, with all of its benefits and some limitations. Thirdly, the metal-oxide surge arrester energy capability and the issues related to the selection of the surge arrester rated energy-in relation to the direct lightning strikes to wind turbines-is addressed. Finally, some general considerations concerning the overvoltage protection selection for wind farm projects, particularly regarding the installation of the metal-oxide surge arresters, are provided as well.

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Equivalent equation of earth resistance for ring electrode of wind turbine

Cited by 10 publications

References 6 publications

Factors Determining the Effectiveness of a Wind Turbine Generator Lightning Protection System

Factors Determining the Effectiveness of a Wind Turbine Generator Lightning Protection System

A simulation approach in electrostatic charging of rotor blades and its effects on transferred overvoltages in wind parks

A Review of Current Issues in State-of-Art of Wind Farm Overvoltage Protection

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