Fimer FMR-PVS-10-TL-SX, Руководство по эксплуатации продукта

Страница: 66 / 80

EN
66
7.4.7.4 PID recovery
PID recovery functionality is provided only for dedicated inverter models (;APD suffix).
Scope:
Polarization of the negative PV array terminal to an adjustable and regulated positive potential with respect to ground when the inverter is
off-line (not connected to the AC grid, ensuring that maximum system voltage is not exceeded on any part of the PV array.
V+
V-
V
DC0
I
MAX=30mA
+
-
V
MPP
V
MPP
= 0
V
+
= V- = V
DC0
P&Q=0
Array terminal voltages with respect to ground during night-time PID recovery operation (inverter is off-line).
Main functions:
• String polarization through the application of a limited current source voltage bias (< 30mA).
• Continuous measurement of positive and negative terminal arrays with respect to ground.
• Run-time monitoring of all relevant parameters and PID recovery function operating status, including dedicated alarms.
Adjustable parameters (via WebUI and Installer for Solar Inverters App):
• Enabling and disabling the PID recovery function
• Reference voltage
Settable on 3 pre-defined values: 500Vdc (default), 550Vdc and 600Vdc
• Lock-in and lock-out voltages.
The PID recovery function starts operating when input open circuit voltage (Voc) drops below selected activation
(lock-in) voltage, while it stops operating when Voc rise above selected de-activation (lock-out) voltage.
The Lock-in and lock-out voltages can be regulated as %*Vstart.
Lock-in/lock-out voltage:
- 0.1/0.2*Vstart;
- 0.2/0.3*Vstart;
- 0.3/0.4*Vstart; (default setting)
- 0.4/0.5*Vstart.
• Starting delay.
Example with default setting 0.3/0.4*Vstart (Lock-in/lock-out voltage): the PID recovery is activated when the input open circuit
voltage(Voc) drops below 0.3*Vstart for at least 5 minutes continuously, while de-activation is triggered immediately when input open
circuit voltage(Voc) exceeds 0.4*Vstart.
ATTENTION – A Not operate on the DC switch when PID recovery is operating (this condition is clearly identified by simultaneous
blinking of green and yellow led).