Behaviour of a system with leakage

If the voltage measured between one of the two poles and ground does not tend to 0V and stabilizes on a value, there is a ground leakage from the PV generator.

Example: When the measurement is made between positive pole and ground, a voltage of 200V is measured.

This means that if the system is made up of 10 modules in series and each one supplies 50V, the leakage can be located between the 4th and 5th PV module.

Va = voltage measured between + pole and = 200V Vb = voltage measured between - pole and = 300V In all measurements with , the ground of the inverter is indicated.

200 V V

t

300 V

Va Vb

1 2 3 4

50 V 50 V 50 V 50 V 5 6 7 8

50 V 50 V 50 V 50 V 9 10

50 V 50 V