End results are another thing.
I was recently trying to program two RDs to operate six 500W heaters
(I needed to use a channel on each as inputs since the battery
nominal voltage is 108 VDC). The heaters work off a 5kW inverter. I
wanted to keep the battery from exceeding 126 volts since it is a
sealed battery.
I tried two basic strategies: one based on different (close) voltage
thresholds, and one based on time delays. It proved very difficult
to prevent the system from becoming unstable, with heaters coming on
in avalanches and high swings in voltage (where I used different
thresholds) or having to put in rather large delays (using delays
rather than voltages to discriminate loads) and having large voltage
swings due to these delays.
Although I have used RDs for quite a few other applications with some
satisfaction, I am not really happy with the way these worked for
fast changing battery voltages (3kw wind turbine) and discrete AC
dump loads on the inverter. In the end the sampling rate is maybe
not fast enough, and so there is insufficient discrimination between
different voltage levels during a rapid rise, resulting in avalanche
behaviour and thence wild swings in voltage.
Not sure how clever a wizard would have to be to figure out all of
the circumstances in such cases but it does not take long to load and
test a new configuration on site in good test conditions. A few more
example configurations would be helpful.
cheers
Hugh Piggott
Sorry, bad terminology on my part.
I was wishing for software that could do more than "set the relay
driver" to respond to programmed parameters.
If a training application could instruct the human on a wide range
of "end results", relay driver action that would be appropriate for
each one, and the action of external components which would help
meet those results, etc...that's more of what I was wishing for.
Jolliness,
Mick Abraham, Proprietor
<http://www.abrahamsolar.com>www.abrahamsolar.com
Voice: 970-731-4675
On Thu, Apr 14, 2011 at 1:53 AM, Hugh
<<mailto:[email protected]>[email protected]> wrote:
At 10:30 -0600 13/4/11, Mick Abraham wrote:
I wish that M-star had some "wizard type" Windows software that
could lead one through the setup.
The wizard is the only way I know of for setting it up. I use 'MS
view' and choose the relay driver wizard. I see they have a new
edition out last month so I will download and try that.
<http://www.morningstarcorp.com/en/support/item.cfm?ItemId=400>http://www.morningstarcorp.com/en/support/item.cfm?ItemId=400
Seems pretty self-explanatory to me but the manual is there for reference too.
I did not know that there was any other way to set them up.
--
Hugh Piggott
Scoraig
<http://www.scoraigwind.co.uk>http://www.scoraigwind.co.uk
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Scoraig
http://www.scoraigwind.co.uk
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