Very long run of LV Cabling

Not too sure how high power a gas engine or gas turbine based genset can be made, I suspect a MW is not too foolish an idea. Certainly propane is a cheaper genset fuel than petrol - there is one that goes to the smaller scout camps that made the switch to calor gas a few years ago.

One of the reasons for using multiple gensets in a large field is the problem of voltage drop over distance, and the sudden step up in the complexity of the H and S environment that surrounds everything over 1kV line to line. 

If the regulations did not step change, then a field of a km or two across, it would be a lot more ‘green’ and more economic use a at low-ish HV in the 1- 3kV range to either bring mains to site or  to run out lines from central generation , and then use the Hiab to  drop transformers at the places where otherwise there would have to be gensets. (*)

Coming back to batteries and inverters, if you look at the batteries on the Rolls-Royce electric aircraft Spirit of Innovation,  that uses a half tonne 750V DC 6000 cell battery of ~ 70kWhr capacity capable of about 15 mins of flight, and giving up to half a megawatt steady state and short bursts of 150% of that  for take off. That sort of power with mains inversion  would do to give you time to start the genset if central power failed at your festival.

Mike.

(*)

There is no technical reason not to do this already - flexible cables and connectors for the low kV range are already common in South African mines, and they can be made very safe - the obstacle here is largely regulatory.

Not too sure how high power a gas engine or gas turbine based genset can be made, I suspect a MW is not too foolish an idea. Certainly propane is a cheaper genset fuel than petrol - there is one that goes to the smaller scout camps that made the switch to calor gas a few years ago.

One of the reasons for using multiple gensets in a large field is the problem of voltage drop over distance, and the sudden step up in the complexity of the H and S environment that surrounds everything over 1kV line to line. 

If the regulations did not step change, then a field of a km or two across, it would be a lot more ‘green’ and more economic use a at low-ish HV in the 1- 3kV range to either bring mains to site or  to run out lines from central generation , and then use the Hiab to  drop transformers at the places where otherwise there would have to be gensets. (*)

Coming back to batteries and inverters, if you look at the batteries on the Rolls-Royce electric aircraft Spirit of Innovation,  that uses a half tonne 750V DC 6000 cell battery of ~ 70kWhr capacity capable of about 15 mins of flight, and giving up to half a megawatt steady state and short bursts of 150% of that  for take off. That sort of power with mains inversion  would do to give you time to start the genset if central power failed at your festival.

Mike.

(*)

There is no technical reason not to do this already - flexible cables and connectors for the low kV range are already common in South African mines, and they can be made very safe - the obstacle here is largely regulatory.