HVDC (High Voltage Direct Current) offers more efficient transmission over AC for long distances. In order to mitigate electromagnetic interference (EMI) at frequencies in the LF and MF frequency bands, it is necessary to surround the transmission lines with magnetic materials to absorb the radiation. This way the limits prescribed by CISPR Standards.
A magnetizable concrete grade with the required capabilities is current under development. The composite of a special magnetic filler embedded in the cement matrix has tailored properties for this application. Compared to conventional magnetic materials such as powder cores currently in use, MAGMENT filters promise 35% lighter and 60% lower cost EMI filters.
Being a concrete it offers a highly robust, cost efficient and in-situ castable solution to dramatically decrease installation costs.