[RE-wrenches] National grid hertz adjustment

[Hugh]

>  a grid-tied inverter would spend the first day of this example 
>totally offline.

This issue is different from keeping the frequency within it's 
regulated limits.  It's keeping the average frequency very precisely 
constant, which is expensive as they say, and probably not important.

Frequency could actually be used to signal the price of electricity 
very cheaply (low frequency means a system under high load and high 
prices, whereas high Hz= low price).  This would be more useful than 
keeping time with clocks, and could help to enable the grid to deal 
with the future demands of variable renewable inputs and limited, 
expensive electricity availability.  Loads that turns off at low Hz 
and others that turn on with high Hz could be very good for the grid.
-- 
Hugh Piggott

Scoraig
http://www.scoraigwind.co.uk