Effect of ground to neutral voltage in solar cell characterization measuring instrument and how it can be reduced?
Sir Bora,
What methods of measurement do you use to evaluete the current intensity and the volatge?
If you use the equations of the theory you can find these values without holding account the ground neutral to voltage.
If you use a multimeter, I don't think that the ground neutral to voltage has a significant effect. If you you doubt you can carry out your measure on the zero reading.
Dear Mr Bora,
Do you have three wire system. Then one of the electrodes is the anode and the other is the cathode and the ground wire which is the connected to metal frame of the solar panels. Normally the photo voltaic system is measured between the anode and cathode such that the ammeter is commented in series with the anode and the voltmeter is connected between he anode and cathode.If both electrodes are isolated from the ground then there will be no effect on the measuring results and this is the normal case. If one of the electrodes has leakage to he ground, there is still no effect on the results. Only the results will be affected when both anode and cathode have a leakage path to the ground. This leakage can be modeled as a shunt resistance.
Best wishes
You can reduce the ground to neutral voltage to almost zero just by connecting them together. But why are you concerned? There may be some obscure effects on certain types of silicon cells if minute currents reach the cell via the array structure, through leakage currents in the glass cover especially when wet. But for ordinary PV cell in a laboratory situation, there is no issue. If you find a problem then you don't have the circuit that you think you have, because of some unsuspected connections somewhere.
Birinchi: What did you observe in your measurements that made you wonder about a possible ground to neutral voltage effect?
- Badges
- Science topic