EKO PV Blocks MP-1000S, Instruction Manual

Page: 24 / 64

PV Blocks system Page 24
IV-IRR
The IV-IRR is used to measure 2 analog irradiance sensors (for example reference
cells).
IV-MOD
The IV-MOD connects the PVBlocks system to an external MODBUS network. It is used
to create an interface to weather-stations and digital sensors. Currently the PV-MET-500
weather station and the EKO MS-90 DNI system are supported.
Workflow
The workflow consists out of 4 steps: configuration, data collection, iv-curves and analy-
sis
configuration:
The user defines the PV-Modules that are connected to the different loads (IV-MPP).
Each module will be assigned a temperature sensor connected to an IV-TEMP and an
Irradiance device connected to a PV-IRR.
data collection
As a default the system measures all values at a one minute interval. This means all
temperatures, irradiances, meteo-data and the current/voltage pair of each PV-Module
are stored.
Each PV-Module is kept in open voltage conditions, so no current is flowing.
IV curves
For each PV-Module it is possible to define an IV-curve measurement interval. When this inter-
val is set to 30 minutes, the system will perform a full IV curve each 30 minutes. In between
these IV-curve measurements the PV-Module can be:
a.
kept in maximum power point (MPPT) by means of the Perturbation and observation
(P&O) algorithm.
b.
kept in open voltage conditions
c.
kept at a fixed voltage bias
analysis
All data can be viewed and exported in the software.
Please read the getting started to setup your system