You might want to try one of those lights up where the inverter is and
see if it flickers up there when a load at the other
end is turned on... Use walkie-talkies maybe ?
Are you sure it's not just surge regulation voltage response time of the
inverter itself ?
boB
On 2/2/2014 4:01 PM, Chris Mason wrote:
You should rent or borrow a power quality analyzer to look at the
phase angles and harmonic distortion throughout the day. A scope will
also help to allow you to look at the waveform of the inverter
produced electricity. You need to properly identify the cause of the
problem before you invest in any equipment.
Resistive loads will not change phase angles. Only capacitive or
inductive loads can do that. However, LEDs work fine in commercial
installations where 0.8 power factors are common so I doubt that is
your problem.
It is more likely that badly formed waveforms cause switching issues
for the LED's driver electronics. Filtering may help.
Line to Line capacitors are probably not going to help, but Line to
Earth capacitors could act as a high pass filter to shunt noise to ground.
On Sun, Feb 2, 2014 at 4:39 PM, Troy Harvey <tahar...@heliocentric.org
<mailto:tahar...@heliocentric.org>> wrote:
We've got a PV system that has long lines from the inverters to
the house (1000 ft or so). While the wires are properly sized
(2x350MCMs), it inherently has a lot of inductance due to the
line-length. What We are noticing is that dimmable LED lights
flicker anytime a new load turned on, even if that load is purely
resistive and the overall current draw is small (20 amps or so).
What I "think" is happening is the LED dimmer circuits get their
cue from phase delays, and that the inductance of the line length
causes some phase jitter everytime a load is applied - thus
causing flicker.
Has anyone dealt with this issue successfully (other than
switching to incandescent lights)? Would a static capacitor bank
at the house do the trick, or do we need some type of active PFC?
And if static did you have any issues with constant power draw
from the capacitors?
Troy Harvey
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