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High Power Compact Underground Transmission

Dr. Denis Imamovic @ HM 2015

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The business environment is in transition –Need for efficient bulk power transmission as challenge

Growing grids

Grids in transition

Unbundling and privatization

Improving supply of power-critical consumers

New power lines and capacity expansion

Affordability of grid automation

Involving “prosumers” through Smart Metering

Investment risk for new technologies

Declining revenues

Huge installed (aging) assets

Energy efficiency directives demands

Integration of municipalities (electricity/gas/heat/water)

Support-policies for renewable energy

Demand response vs. demand management

Investing in automation vs. improving hardware

Energy autonomyCross border interconnectors

Underground bulk power lines investment

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Compact transmission lines enable for highest transmission capacities at very low losses

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Compact transmission lines are used in three main applications

Transmission lines (between two pylons)1 Hydro power plants –

vertical GILs2 Substations and conventional plants3

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Two main innovation areas are identified to establish an optimized AC/DC compact transmission line

Electrical challenges Process & mechanical challenges

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Compact transmission lines can transmit high power loadsin narrow trenches

~ 25 m

Max. 4 – 5,2 GW

Max. 4 – 5,2 GW

~ 60 m

Max. 3 GW

Max. 3 GW

~ 8 m

Max. 5 GW

Max. 5 GW

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Compact transmission lines as solution for the balance in the magic triangle

• Highest efficiency transmission and long lifetime

• Low land usage & low external electromagnetic fields

• High reliability and high safety (no fire hazard)

Availability / security of supply

SUSTAINABLEENERGYSUPPLY

Environmentallyfriendly

Affordability / economic efficiency

€

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Thank youDr. Denis Imamovic @ HM 2015