Esteemed Wrenches,
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.
/- Inspect inverters according to requirements in NETA
Acceptance Testing
Specifications.
- Test the PV system under prime solar design conditions to
validate system
power performance rating. Use instruments calibrated within
the previous six
months according to NIST standards. /(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)
/
- Simulate malfunctions, including ground faults, to verify
protective device
operation. /(I would create a GF and then replace the fuse for this test)
/
- Test anti-islanding shutdown function due to normal utility
source failure,
time delay and automatic restart after utility power restoration.
/(this is an easy one)
/
- Test and record the total harmonic distortion (THD) content
of output
current at 25, 50, and 100 percent of system rating. Comply with IEEE 519
at MDP point of connection.
- Test and record the real power output for each inverter,
and total power
delivered at the grid tie connection, for a 24 hour period. The continuous
power output during prime solar conditions shall meet
or exceed
performance requirement under part I of this specification.
- For each inverter, record DC input voltage for 24 hours, to
demonstrate
affects of maximum power point tracking (MPPT), voltage regulation within
inverter rated limits, and affect of partial shading on solar
modules.
Simulate partial shading by covering 50% of modules during
prime solar
conditions.
- Record of Tests and Inspections: Prepare and submit
documentation of tests and
inspections, including references to manufacturers' written
instructions and other test
and inspection criteria. Include results of tests, inspections, and
retests.
/
Any advice would be gratefully accepted and appreciated!
Best,
Greg Egan
NABCEP Certified PV Installer
Remote Power Inc.
Fairbanks, AK
--
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.
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