The Roma to Brisbane natural gas pipeline, spanning approximately 438 kms from Roma to Brisbane, Queensland, faced potential electrical hazards due to its proximity to various high voltage (HV) assets. These hazards posed risks to the pipeline and its associated equipment. Specifically, the pipeline needed an assessment of Earth Potential Rise (EPR) and Low Frequency Induction (LFI) originating from earth faults on nearby or parallel HV assets. The challenge was to identify and quantify these hazards and develop mitigation strategies.
Zero Sequence conducted a comprehensive assessment in accordance with the AS4853 standard, focusing on electrical hazards associated with metallic pipelines. The assessment covered both level 1 and level 2/3 evaluations for HV assets along the entire 438-km route. This included parallel Ergon 110kV transmission lines, Powerlink 275kV powerlines, Energex and Ergon 33kV powerlines and approximately 13 substations and power stations in close proximity to the pipeline.
The study involved quantifying the electrical hazards to the pipeline and its appurtenances, specifically addressing EPR and LFI faults related to nearby HV assets. The outcome was a set of mitigation options tailored to the pipeline and its appurtenances, effectively reducing specific and overall risks.
Additionally, Zero Sequence developed a thorough construction safety document designed to mitigate electrical hazards during pipeline maintenance and construction. This document was widely distributed within APA, ensuring the safety of all personnel involved.
The Roma to Brisbane Pipeline Electrical Hazard Assessment by Zero Sequence yielded critical insights and actionable solutions. By identifying and quantifying potential electrical hazards, the assessment enabled the development of targeted mitigation strategies, enhancing the safety and reliability of the pipeline and its appurtenances.
Furthermore, the construction safety document provided comprehensive guidance to ensure the safety of personnel during pipeline maintenance and construction activities, further contributing to a safer and more efficient operation.
Overall, this assessment exemplifies Zero Sequence’s commitment to ensuring the safety and integrity of critical infrastructure, even in challenging environments where electrical hazards are a significant concern.
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Zero Sequence Earthing is a specialist electrical engineering consultancy offering earthing and lightning protection design and testing services.
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