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Monitoring System - Sunpower

Pragma Engineering has estblished in 2011 a partnership with Sunpower, company leader in the field of designing photovoltaic panel. Pragma was responsible of designing and realization of an Inverter DC Current Inputs Monitoring System.

The photovoltaic power plants are placed in the region of Piemonte, province of Alessandria (Italy). These photovoltaic power plants are 2.3, 4.56 and 4.29 MWp size approximately.

The monitoring system is able to acquire DC input currents of inverter devices included in a photovoltaic plant. In detail the monitoring system includes 8 current channels in order to acquire 4 DC lines for the master unit inverter and 4 DC lines for the slave unit inverter.

The system has no views on local, but it can be queried via MODBUS TCP/IP protocol by Ethernet connection included in the controller module. The system has been configured with MODBUS parameters in order to permit requests by SCADA application supporting MODBUS communication protocol.

Any fails of the transducers or of the system will be storage in the status discrete registers, in addition a led will be blinking in case of transducer fail or will be on in case of system fail (in normal operating mode the led will be off ).

(IEC 60068-2-6, IEC 60068-2-64)5 grms, 10 to 500 Hz
Processor clock 400MHz
Non volatile RAM 256MB
System RAM 128MB
Ethernet port 10BaseT and 100BaseTX (100Mbps max)
Serial port RS232 (115200bps maximum)
I/O Module slots 4 (different kinds of I/O can be connected)
Supply range 9 to 30VDC
Consumption 15W maximum
Operating temperature
(IEC 60068-2-1, IEC 60068-2-2)
-20 to 55 °C
Operating humidity
(IEC 60068-2-56)
10 to 90% RH, non condensing
Operating vibration
(IEC 60068-2-6, IEC 60068-2-64)
5 grms, 10 to 500 Hz
Maximum altitude 2000m 
photovoltaic monitoring system