Marv Dargatz wrote:
Check out the following link. Just ONE example of what the utility
must deal with.
http://tdworld.com/customer_service/power_new_technology_solves/
I'm not defending the utilities. They definitely have their faults
(argh, argh), but they have some severe challenges that we are not
always sensitive to.
See Ya!
Marv
Enphase Energy
707 763-4784 x7016
In some cases, like for this flicker problem example due to irrigation
pumps turning on, it sounds like the ieee1547 spec needs
to be able to relax somewhat to give the inverter time to help out the
brownout condition.
I kind of doubt that the lineman will be fixing the problem withing 2
seconds, the present disconnect time allowed, let alone,
a small-ish grid tie inverter being able to even drive the local
transformer and/or neighborhood loads without REALLY turning
off. I know... The spec is trying to protect everything and everybody
for every possible situation.
Like Richard Perez once said in a radio interview with Art Bell, "The
grid needs your help".
boB
William Miller wrote:
William:
It was my understanding that in special circumstances, inverter
manufacturers are allowed to widen the allowances for specific
units. IIRC, a letter from the utility was required. In some
inverters, a change of firmware with the more liberal settings does
the job. My memory is subject to verification.
William Miller
At 10:06 AM 8/16/2009, you wrote:
I'm beginning to wonder if the allowed voltage range for grid-tie
inverters (+/-10%) is too
sensitive in some networks and contributes more harm than benefit.
This is close to home.
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