Download Metrology to enable improved underwater EMC testing MU

Metrology to enable improved
underwater EMC testing MU-EMC
Raúl Caballero Santos (CEM)
Joaquin del Río (UPC)
Albert Garcia (UPC)
Background
• Actually many surveys are been realized in the seawater, because a
new technologies are implanted to get energy as:
Problematic
• The main point is that these infrastructures are connected with high
power lines to shore, and these cables can transport high current levels.
• High current and voltage causes anthropogenic EM interferences added to
the zero state natural EM fields.
• which equipment is used to measure this field?
• MSFD (Marine Strategic Framework Directive) is clear about anthropogenic
acoustic noise, but still no reference to EM fields interferences and its
impact to the local ecosystems.
Measurement System
Magnetic and electric field sensors
Courtesy of Mappem Geophysics
• Now, the surveys are performed by two different sensors, one for the
electrical filed, and other for the magnetic field. These sensors are
characterized and calibrated under the IEEE Std 644-1994, but the
problem is that this document is for measurements on the air,
environment that is low conductance, and now the equipment are
used underwater, an environment with a higher conductance than
the air.
• We choose an example of electrical profile in a real campaign:
In this example is clear the uncertainty is
disregards….
Proposal
For this, we propose a new line of research to study the calibration on
seawater for such type of measurements, and improve the uncertainty
calculation of the equipment used.
We can offer:
• The expertise and the quality assessment of CEM
• The OBSEA seafloor cabled observatory is available as a test site and
ready for instrument deployment (Operated by UPC).
Thanks' for your attention
Any questions?
Contact:
Raúl Caballero Santos (CEM) [email protected]
Joaquin del Río (UPC) [email protected]
Albert Garcia (UPC) [email protected]