Product Information IPV Monitoring and Controlling Energy … · Transmitter GTMU Optimum ...

GHM GROUP CORPORATE | GHM Messtechnik GmbHSchloßstr. 6 | 88453 Erolzheim | GERMANYPhone +49 7354 937233-76 | Fax +49 7354 937233-88www.ghm-group.de | [email protected]

Product information IPV

1pi-ipv_system_e V1.40-00

GHM Messtechnik GmbH – Sales Center InternationalSchloßstraße 6 ● 88453 Erolzheim ● Germany Fon +49-7354-937233-0 ● Fax -88www.ghm-messtechnik.de ● [email protected]

Product Information IPV

Monitoring and Controlling Energy Efficiencyof Photovoltaic Installations

FeaturesSystem Current and voltage

supervision of solar panels

Control of switching states

Sources Shunt and inductive sensors instring arrays

Standard signals fromtemperature, wind speed, andirradiation sensors

Door switches

Digital outputs of powerinverters

Applications● Solar Power Plants

● Off-Grid Systems

● Roof Systems

pi-ipv_system_e V1.40-00 1



2 pi-ipv_system_e V1.40-00



Functions and BenefitsInstallations generating green energy have to beoperated economically and efficiently to feed in amaximum of energy. For that consistent informationabout their efficiency is absolutely mandatory.Permanent control also provides early detection ofdefects and malfunction of a PV system or its solarpanels. Further on additional access control andequipment condition monitoring should be set up.

Data and state acquisition of the PV system isdesigned with modular components. There aremodules measuring DC current and voltage of theindividual strings, modules for panel temperature, andsignals of wind speed and irradiation sensors.

Digital-In modules monitor e.g. switching states ofdoor switches and inverters.

The individual DIN-rail modules are mounted in open-field array boxes or in a local indoor control cabinet asneeded by application and quantity. There they arelinked each time via an internal bus with an intelligentcommunication unit transmitting the collected dataover a field bus (Modbus RS485 or CAN) to the nexthigher control level.

The modular design allows manifold combinationsand upgradings.

So the modules are not just suited for large powerplants, but also for monitoring of medium and smallpower installations.







The current-to-voltage characteristic of a solar panelbuilt of several solar cells connected in series, reflectsthe specific properties of this power generator. Thecurve of a solar panel is very similar to a single cell,despite the different scale factor. Solar panels areagain connected in series or in parallel to generatemore current or voltage as appropriate.

Under normal conditions the characteristic curve islike:

Fig.1 Schematic view of IV characteristic

Voltage value at MPP is approximately 80% opencircuit voltage of a solar panel.

MPP (Maximum Power Point) is the operating pointwith maximum power as product of cell current andvoltage:

Fig. 2 Schematic view of maximum powercharacteristic

From the characteristics it can be learned howimportant it is, that the operating voltage of the panelsis not suppressed too much below the MPP, avoidingpotential energy losses. Degradation of cells byinternal or external influences over time can be seeninstantly from the measured curves. Depending onhow many panels are combined to a string, occurringmalfunctions can also be localized physically precise.

The energy efficiency of the strings is also remarkablydependent on a mismatch caused by e.g. shadowingof cells or different input resistances.

Fig.3 Schematic view of shadowing impact within a10..75 % range (solid line ideal characteristic)

The output current of a solar panel is proportional toincident solar radiation. Maximum radiated power onearth is in the range of 800 to 1200 W/m².

Fig. 4 Schematic view of irradiation impact within 100to 1000 W/m² (solid line

The energy yield of a panel is determined by its cellwith the lowest yield. Degradation of cells by internalor external influences over time, can be seen instantlyfrom the measured curves. Depending on how manypanels are combined to a string, yield losses can alsobe localized physically precise.


GHM GROUP - Standort Martens | GHM Messtechnik GmbHKiebitzhörn 18 | 22885 Barsbüttel | GERMANYPhone +49 40 67073-0 | Fax +49 40 67073-288www.ghm-group.de | [email protected]





The energy yield of solar panels is also affected bycell temperature, as cell voltage is decreasing withincreasing temperature. For reference, temperature inan array is measured exemplarily at a characteristicspot.

Fig. 5 Schematic view of temperature impact within(from left) +80..25 °C (solid line)

Temperature measurement can be done with atemperature transmitter with signal current or voltageoutput . Pt100 sensors can be used directly withoptional adaptation of the AD module.

Data from wind speed and irradiation sensors viasignal current or voltage transmitters can also beacquired and incorporated in the monitoring of theinstallation.

Switching states of e.g. doors can be supervised withthe digital input module. This accommodates safetyaspects (security control) or shutdown of inverters.

The following listed measurement devices guaranteeefficient monitoring of PV systems' energy yield.Further on malfunction of or in strings depending onthe layout of the monitoring system can be recognizedquickly, avoiding potential energy and financial losseswith it.

Device Overview

Module Input Output

Pa

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Se

nso

r

Vo

ltag

e

Cu

rre

nt

Sig

na

l

Vo

ltag

e

Sig

na

l

Cu

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Pt1

00

Dig

ita

l-O

ut

Inte

rna

l (S

PI)

Mod

bu

s

RS

48

5

CA

N

IPV Voltage 5

IPV Current 5

IPV Signals AD 6

IPV Signals D 6

IPV Communication 7

Standard, Optional, per type of sensor

Mistakes reserved, technical specifications subject to change without notice





GHM Messtechnik GmbH – Location MartensKiebitzhörn 18 ● 22885 Barsbüttel ● Germany Fon +49-40-670 73-0 ● Fax -288www.ghm-messtechnik.de ● [email protected]

Devices for System Monitoring IPV

IPV VoltageCharacteristics

This IPV module serves to acquire DC voltage values in solarsystems for string efficiency monitoring in medium sized or largefacilities.

Technical Data

Supply voltage 24 V DC ± 10 %

Power consumption at nominal voltage appr. 0.25 W

Electrical isolation 1000 V DC

Environmental temperature -25..+60 °C

Module Voltage1 channel per moduleAccuracy

max. 1000 V DC± 2 %

Installation

Power supply and internal bus withT-Bus connection of housing

VoltagePower screw terminal 10 mm²

Dimensions

Ordering Code

1. 2. 3.

IPV - - -

1. Input

1 1 channel

2. Measuring quantity

1 Voltage

3. Output

5 Bus (internal)

IPV CurrentCharacteristics

This IPV module serves to acquire DC current values in solarsystems for string efficiency monitoring in medium sized or largefacilities.

Technical Data


Power consumption at nominal voltage appr. 1.0 W (full load)



Module Current (2 channels)with power connectorAccuracyModule Current (2 channels)contactlessAccuracy

± 25 A @ max. 1000 V DC< 1.5 %

± 50 A @ max. 1000 V DC< 1.5 %

Installation


CurrentPower screw terminals 10 mm²,contactless via feed through

Dimensions

Ordering Code

1. 2. 3.

IPV - - -

1. Input

2 2 channels (with power connector)

3 2 channels (contactless)


2 Current

3. Output

5 Bus (internal)







IPV Signals ADCharacteristics

This IPV module serves to acquire analog and digital signals in solar systems.

Technical Data


Power consumption at nominal voltage 0.5 W)



Module AD SignalsInput – Analog (2 channels)signal current or -voltagealternatively temperatureInput– Digital (2 channels)switch contacts

0.. 20 mA or 0.. 10 VPt100

open >16 kΩ

Installation


Signals via screw terminal 2.5 mm²

Dimensions

Ordering Code1. 2. 3.

IPV - - -

1. Input

2 2 channels analog and digital


3 Analog-I and Digital

4 Analog-Pt100 and Digital

5 Analog-U and Digital

3. Output

5 Bus (internal)

IPV Signals DCharacteristics

This IPV module serves to acquire digital signals in solar systems.

Technical Data


Power consumption at nominal voltage 0.25 W



Module D SignalsInput– Digital (8 channels)switch contacts

up to 24 Vopen >16 kΩ

Installation

Power supply and internal bus with T-Bus connection of housing

Signals via screw terminal 2.5 mm²

Dimensions

Ordering Code1. 2. 3.

IPV - - -

1. Input

8 8 channels digital


6 Digital

3. Output

5 Bus (internal)







IPV CommunicationCharacteristics

This IPV module serves to transmit data acquired by the current,voltage, and signal modules of solar systems for string efficiencymonitoring in medium sized or large facilities.

Data of the individual measurement modules are picked up overthe internal serial bus and processed. Up to 18 subscribers can beoperated via the internal bus, and configured for ID andmeasurement ranges accordingly. The digitized measurement dataare then transmitted via a field bus (Modbus RS485 or CAN) to thenext superordinate level (like a local control unit or to a data loggerfor smaller facilities).

Technical Data


Power consumption at nominal voltage 10 W for 8 subscribers



Module Communicationinternalexternal

serialField bus

(Modbus RS485, CAN bus)

Installation

Power supply and external bus via screw terminal2,5 mm²

Measuring quantities and supply of the modulesvia internal bus with T-Bus connection of housing

Dimensions

Ordering Code

1. 2. 3.

IPV - - -

1. Input

5 Bus (internal)

2. Measuring quantities

9 all

3. Output

7 CAN bus

8 Modbus RS485


GHM GROUP - Standort Greisinger | GHM Messtechnik GmbHHans-Sachs-Straße 26 | 93128 Regenstauf | GERMANYPhone +49 9402 9383-0 | Fax +49 9402 9383-33www.greisinger.de | [email protected]



GHM Messtechnik GmbH - Location GreisingerHans-Sachs-Straße 26 ● 93128 Regenstauf ● Germany Fon +49 (0) 9402 - 9383 - 0 ● Fax -33www.greisinger.de ● [email protected]


AccessoriesVarious temperature sensors and transmitters (details see maincatalog)

Cable Sensor GTF 101 P

● Pt100, Pt1000● Complete with cable sleeve and (open end) cable ● Extremely rugged

Temperature Sensor withTransmitter GTMU

● Optimum adaptation with 4 different designs● PT100 or Ni Cr-Ni sensor incl. transmitter● Ready for mount and operation

Measurement KitTemperature SL-Pt eco Set

● Watertight and shockproof hand-held device (with Silicone protective cover)

● Waterproof temperature sensor● Top quality carry case● Manufacturer's calibration certificate ● Free factory calibration after 1st year

with automatic reminder by calibration lab





Product Overview

„Industrial Sensors and Instrumentation“

„Process Instrumentation “Hygienic Design“GHMadaptTemperature FlowLevel / Filling HeightAnalysis

“Laboratory Instrumentation“

„Industrial Electronics“Displays / ControllerTransmitter / Signal conditioningIsolating convertersSafety and Monitoring DevicesPower ElectronicsCalibration and Testing

“Measuring Data Acquisition“Data Logging and MonitoringTest Bench Measurement TechnologyRenewable Energies

PU-general-ghm_e V2.00-00

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Product Information IPV Monitoring and Controlling Energy … · Transmitter GTMU Optimum ...

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