[RE-wrenches] utility line voltage issues

[boB Gudgel]

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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