8/14/2019 Q&A session - Webinar on Future Electricity Grids

http://slidepdf.com/reader/full/qa-session-webinar-on-future-electricity-grids 1/2

WEBINAR on FUTURE ELECTRICITY GRIDS1/2

http://www.leonardo-energy.org/mini-course-future-electricity-grids-session-12

Q&A session

Q: Is there any European wide regulation expected?A: Yes, there will be a European regulator (ACER) and there are Europeanregulations, but the question is to what degree they will have an influence:binding powers or being implemented by member states is not the same.

Q: Common cost ratio overhead vs underground: 5X1 rural flatterrain, 10 X1 difficult rural terrain, 20X1 for urban undergroundinstallation. Is that correct?A: if you talk about costs: probably yes, but as mentioned in thepresentation: if you can't build it, the costs is not important.

Q: In smartgrid, we are trying to implement our control IT &communication technology to make the distribution grid morerobust, reliable, efficient, etc. Is it possible to use thesetechnologies at Transmission level in a similar way as fordistribution grid?A: This is a very open question as there are different aspects to it. First of all, the transmission system is a meshed system while the distributionsystem is usually radial. IT, communication and control techonology arealready used in the transmission system, probably more than in distribution.Some techniques will be transfered from distribution to transmission or from

transmission to distribution, others will not...

Q: So, increase of RES generation would need a lot af new network to balance the wind intermittent production, wouldn't it?A: Depends on where you put the generation, but it would need more gridthan traditional generators.

Q: If we are thinking about the future grids, it seems to me thatHVDC cables should be a big part of itA: I agree, although they are also not perfect

Q: How grid is used as a storage device?

A: The power system can not store energy, but by reducing increasing othergenerators elsewere

8/14/2019 Q&A session - Webinar on Future Electricity Grids

http://slidepdf.com/reader/full/qa-session-webinar-on-future-electricity-grids 2/2

connected to the grid, you have some kind of storage device. Only theenergy is not stored inelectricity, but in increased water levels in reservoirs, less fossil fuelsburned,...

Q: It seems that a lot of obstacles exist to transmission expansionplanning. Do you think an economical-environmental-social DGcapacity expansion planning tool that takes into account all thespheres of sustainability would be useful for the quicker evolutionof the grid?A: Answered during webinar

Q: Thank you for your time - What is the present use or benefit (if known) of Synchrophasors?A: Answered during webinar, see the recording.

Q: What about High Temperature Low Sag conductors fto uprate

existing lines?A: Answered during webinar, see the recording.

Q: From presentation, it appears that the political factor is the keyobstacle for future expansion in Europe, so, how to manage it in anintegrated planning?A: Answered during webinar, see the recording.

Q: How would you assess the current value of back-to-back HVDCtransmission solutions in Europe?A: Answered during webinar, see the recording.