power quality problems [RE-wrenches]

[Marco Mangelsdorf]

We appear to be having power quality issues with our local utility.  I've
replaced the grid-tie 4 kW inverter twice now and my customer is still
seeing the bugger trip off-line frequently during the day.  There happens to
be an 11 MW windfarm not more than 10 miles from the site and I know that
frequency drift is an issue, so I have widened the frequency window of the
inverter (with the utility's knowledge and approval).  

My question: are there any other things I should be looking for?  Harmonic
distortion? Gremlins in the transformers?  And can anyone recommend a
relatively inexpensive data recorder which could sit up at the site for a
week or so and record events?  

I'm all for wind farms, but am now concerned that our 30+ MWs worth of
wind-based power (in a grid of ~ 200 MW peak generating capacity) may not be
a good thing for all of my grid-tie systems.

Thanks,
marco

Marco Mangelsdorf, Ph.D., President
Electrical Contractor License C-26351
69 Railroad Avenue, A-7
Hilo, Hawai'i 96720
(808) 969-3281, 934-7462 facsimile
www.provisiontechnologies.com 

 

 


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