I programmed slightly different set of power curves for our turbine over the weekend. Primarily I'm attempting to do two things:
1) Flatten the curve slightly from cut-in to maybe 12 mph
2) Raise the overall voltage range and speed of the turbine so as to better match the available power.
I've done this based in large part on observation and from data collected over the last ~year. Unfortunately I still don't have a good means of collecting wind speed, so it is a bit less precise:
In light load conditions I'd mentioned the audible “awakening†at cut-in. My thinking is this might help. There is very little power at cut-in, if we hit it to sharply it spends a lot of time cycling above and below cut-in. The other fixed point of course is that we have to transition some of the load to the second controller at roughly half of the fully loaded condition (~2.5 kW). What I tried to do is slightly compress the voltage steps in the upper rpm range. Overall I've raised the upper voltage limit from about 140V to 160V, or about 2.7x the voltage at cut-in.
I welcome thoughts, suggestions. Happy Holidays,
~kitestrings