Power - Wind Power Testing at UNAVCO through 2005, Phase 1
Wind Power Testing at UNAVCO through 2005, Phase 1
The purpose of phase one of the wind generator testing is to become familiar with the general setup and power characteristics of the system. This includes tower construction, cabling, regulation and integration with a solar system. Though not a likely field system, this setup, located in a generally windy location south of Boulder, demonstrates constant and gusty wind conditions as well as stale weather conditions.
Other site photos:
This site serves as a test site for our power, GPS and communications equipment. The configuration during the test includes:
Data and Graphs
April 14, 2002 - Duration: 1 day, 5 second intervals
May 6, 2002 - Duration: 14 days, 1 minute intervals
May 28, 2002 - Duration: 8 days, 30 second intervals
Going into the test, it was known that the system load would not be enough to need the full capacity of the generator and solar panels combined. Because the site experiences non-windy periods, unhooking the solar system was not an option.
Throughout the test, the system appeared to perform reliably and consistently. The only problem we had appears to have been a defective circuit breaker. It was replaced with a higher rated, self resetting unit. Ice, extreme gusts and other weather appears to have not affected the unit. During this test, no lighting storms had occurred.
From the data obtained and seen in the graphs linked to above, it is seen that the system displayed two unwanted characteristics:
A power filter can easily solve the first issue without changes to the system setup, however, the second issue is a little more complicated. Because both controllers are attempting to regulate the batteries using phased and pulse width modulated techniques, the current draws from the regulators are constantly changing. Since the regulators are not clocked together, their readings are taken at different points in each cycle. This appears to be causing interference in the charging cycles of each device.
Fortunately, phase two should prove to weed out the issues seen above as we will construct a likely field configuration and reduce the output of the generator to match the system power requirements. This will be done by disconnecting one or two of the three internal windings of the generator. If the overall power delivery of the solar and wind units are kept under 40 amps, then a single Trace C-40 will be able to regulate both power sources.
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|Posted by: Beth Bartel - Sat, Mar 27, 2010 at 11:05 PM. This article has been viewed 4112 times.|
|Online URL: https://kb.unavco.org/kb/article/power-wind-power-testing-at-unavco-through-2005-phase-1-465.html|