An assessment of whether your project meets national and state regulatory requirements and standards for Electromagnetic Field (EMF), Electromagnetic Compatibility (EMC), and Electromagnetic Interference (EMI) is key to the success of your project.
GHD offers a range of services:
- Electromagnetic Fields (EMF) Identification through measurement and predictive tools of the strength of both electric fields (E-Field) and magnetic fields (H-Field) associated with a project as they relate to public safety and worker onsite exposure as well as any specific mitigation and management measures required to avoid or minimise the risk of adverse effects from EMF.
- Electromagnetic Compatibility (EMC) Identification and assessment of the electromagnetic interaction of electrical systems in a common environment, to provide design rules and implement mitigation measures as required to ensure the correct operation of new and existing systems.
- Electromagnetic Interference (EMI) Introducing new large physical structures such as wind turbines into an environment has the potential to cause issues with existing operational radio services such as point-to-point links, land mobile radio systems, TV and radio reception and mobile phone cellular services.
For clients building new and upgraded infrastructure, the importance of an EMF/EMC/EMI assessment should not be under-estimated; it is significantly easier and cheaper to remedy any potential electromagnetic issues during the design process than to implement mitigation strategies post-construction.
As part of an EMF assessment, GHD offers a range of client services including:
- Existing EMF baseline assessments.
- Determination of relevant criteria.
- An assessment of EMF impacts within public spaces and at sensitive receptor locations.
- Occupational exposure at the project site and along any associated transmission lines.
- Predictive modelling of electric and magnetic field strengths using CDEGS software.
- Mitigation and management measures such as modification of alignments or shielding.
- Post commissioning compliance monitoring and reporting.
As part of an EMC assessment, GHD offers the following general client services:
- Development of EMC project plans.
- Review of proposed design and development of system/subsystem breakdown structure.
- Initial EMC risk assessment.
- Workshops with designers to confirm initial risks, identify additional risks, and agree on proposed mitigation measures.
- Development of EMC design reports documenting project processes, requirements and assessments.
- Prediction of emission levels using CDEGS software.
- Liaison with construction team to obtain compliance certificates for electrical equipment.
As part of an EMI assessment, GHD offers the following general client services:
- Review of licensed radio communication services.
- Conduct a search of the communications and media registers.
- Undertake a local search of radio communications devices.
- Review the mobile telecommunications databases.
- Identification of existing potentially affected infrastructure that requires protection in terms of EMI such as pre-existing television, radar and radio reception or transmission infrastructure.
- Undertake Fresnel Zone calculations to determine the distance between line-of-sight radio paths and the proposed project infrastructure and assess and obstruction to radio and radar line-of-sight, any near-field effects, and any reflection or scattering of radio signals.
- Signal strength surveys.
GHD has delivered a range of electromagnetic field assessments including projects for:
- Wind farms.
- Transmission lines.
- Solar and battery installations.
- Substation installations and upgrades.
- Electrified rail infrastructure.
- Telecommunications rooms (TELCO).
- Developments near existing infrastructure.