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Wind Turbine Earthing System Design and Analysis

Earthing System Design Analysis

design verification

Earthing system design analysis is necessary to ensure that an earthing system is capable of performing its intended primary functions.

Earth potential rise and safety potentials such as touch and step potentials are only a few of the performance parameters requiring verification.

Axonas can provide highly accurate earthing system verification services in accordance with several industry standards such as the ENA TS 41-24, BS 50522 and IEEE Std. 80.

transient analysis

Transient analysis is essential to assess the impact of transient over-voltages on an earthing system during high-frequency transient events such as lightning strikes.

If not accurately analysed and mitigated against, this can result in personnel becoming exposed to hazards and equipment being damaged.

Axonas can undertake detailed transient analysis on earthing systems using engineering software.

Earthing measurements interpretation

soil resistivity measurements

The soil structure is the Achilles’ heel of any earthing system design and soil resistivity measurements are required to determine a suitable soil model for use during design.

The interpretation of these measurements is of paramount importance to the development of a reliable earthing system.

Axonas can provide expert interpretation support through a combination of research and analytical modelling using specialist engineering software.

electrode resistance measurements

Electrode resistance measurements are undertaken post-installation of an earthing system as a means of design and implementation verification. The Fall-of-Potential (FOP) method is commonly used.

These measurements are subject to influence from a multitude of factors which, if left unaccounted for, can ultimately result in a compromised earthing system. 

Axonas can provide expert interpretation support through a combination of research and analytical modelling using specialist engineering software.

Soil Resistivity Measurements Analysis for Earthing System
Substation Earthing System Design and Analysis

interference studies

third-party interference

Earthing systems and earthing measurements are influenced by the presence of third-party metallic services and structures such as transmission lines, rail networks and other buried metallic structures.

This influence can have skewing and even detrimental effects on the performance of earthing systems if not accurately analysed.

Axonas can incorporate and analyse these third-party interference effects under normal and abnormal conditions using specialist accuracy-driven computer modelling techniques.

Electromagnetic interference

When metallic services such as pipelines share a joint-use service corridor with overhead or underground electrical transmission lines, voltages and currents are induced into the pipeline due to electromagnetic interference (EMI).

These conditions present a electric shock hazard to the pipeline operators if the relevant earthing systems are not adequately designed. EMI also subjects the pipeline to damage or malfunction causing costly service disruptions.

Axonas can perform detailed EMI studies and propose effective mitigation solutions where necessary by applying advance system modelling methodologies using engineering software. 

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