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<font face="Arial">Esteemed Wrenches,<br>
<br>
I'm in the process of bidding a small government job. They're
requiring the following tests. I was wondering if any of you have
ever run across this before and if so how you went about it. <br>
<br>
<i>- Inspect inverters according to requirements in NETA
Acceptance Testing <br>
Specifications. <br>
<br>
- Test the PV system under prime solar design conditions to
validate system <br>
power performance rating. Use instruments calibrated within
the previous six <br>
months according to NIST standards. </i>(not easy since the site
they've chosen will shade some of the array all the time. I should be
able to just explain this to them)<br>
<i><br>
- Simulate malfunctions, including ground faults, to verify
protective device <br>
operation. </i>(I would create a GF and then replace the fuse for
this test)<br>
<i><br>
- Test anti-islanding shutdown function due to normal utility
source failure, <br>
time delay and automatic restart after utility power restoration. </i>(this
is an easy one)<br>
<i><br>
- Test and record the total harmonic distortion (THD) content
of output <br>
current at 25, 50, and 100 percent of system rating. Comply with IEEE
519 <br>
at MDP point of connection. <br>
<br>
- Test and record the real power output for each inverter,
and total power <br>
delivered at the grid tie connection, for a 24 hour period. The
continuous <br>
power output during prime solar conditions shall meet
or exceed <br>
performance requirement under part I of this specification. <br>
<br>
- For each inverter, record DC input voltage for 24 hours,
to demonstrate <br>
affects of maximum power point tracking (MPPT), voltage regulation
within <br>
inverter rated limits, and affect of partial shading on solar
modules. <br>
Simulate partial shading by covering 50% of modules during
prime solar <br>
conditions. <br>
<br>
- Record of Tests and Inspections: Prepare and submit
documentation of tests and <br>
inspections, including references to manufacturers' written
instructions and other test <br>
and inspection criteria. Include results of tests, inspections, and
retests. <br>
<br>
</i><br>
Any advice would be gratefully accepted and appreciated!<br>
<br>
Best,<br>
<br>
Greg Egan<br>
<br>
NABCEP Certified PV Installer<br>
Remote Power Inc.<br>
Fairbanks, AK</font>
<pre class="moz-signature" cols="72">--
Greg Egan
Remote Power Inc.
981 Gold Mine Trail
Fairbanks, AK 99712
P. 907.457.4299
U.S.Distributor for Outback Power Systems and other premium power equipment.</pre>
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