- GHM GROUP | GHM GROUP · m/s w/m2. Product information IPV 4 pi-ipvsysteme V140-00 Device...

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Product information

Monitoring and Controlling Energy Efficiency of Photovoltaic Installations

Product information IPV

2 pi-ipv_system_e V1.40-00

System Current and voltage supervision of solar panels Control of switching states

Sources Shunt and inductive sensors in string arrays Standard signals from temperature, wind speed,

and irradiation sensors Door switches Digital outputs

Solar Power Plants

Off-Grid Systems

Roof Systems

Functions and BenefitsInstallations generating green energy have to be operated eco-nomically and efficiently to feed in a maximum of energy. For that consistent information about their efficiency is absolutely mandato-ry. Permanent control also provides early detection of defects and malfunction of a PV system or its s olar panels. Further on addition-al access control and equipment condition monitoring should be set up.Data and state acquisition of the PV system is designed with mod-ular components. There are modules measuring DC current and voltage of the individual strings, modules for panel temperature, and signals of wind speed and irradiation sensors. Digital-In modules monitor e.g. switching states of door switches and inverters.

Features Applications

The individual DIN-rail modules are mounted in openfield array box-es or in a local indoor control cabinet as needed by application and quantity. There they are linked each time via an internal bus with an intelligent communication unit transmitting the collected data over a field bus (Modbus RS485 or CAN) to the next higher control level.The modular design allows manifold combinationsand upgradings.So the modules are not just suited for large power plants, but also for monitoring of medium and small power installations.


3pi-ipv_system_e V1.40-00

The current-to-voltage characteristic of a solar panel built of several solar cells connected in series, reflects the specific properties of this power generator. The curve of a solar panel is very similar to a single cell, despite the different scale factor. Solar panels are again connected in series or in parallel to generate more current or voltage as appropriate.

From the characteristics it can be learned how important it is, that the operating voltage of the panels is not suppressed too much be-low the MPP, avoiding potential energy losses. Degradation of cells by internal or external influences over time can be seen instantly from the measured curves. Depending on how many panels are combined to a string, occurring malfunctions can also be localized physically precise.The energy efficiency of the strings is also remarkably dependent on a mismatch caused by e.g. shadowing of cells or different input resistances.

Under normal conditions the characteristic curve islike:

Fig.1 Schematic view of IV characteristic Fig.3 Schematic view of shadowing impact within a 10..75 % range (solid line ideal characteristic)

Fig. 2 Schematic v iew o f m aximum p ower characteristic

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

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

MPP (Maximum Power Point) is the operating point with maximum power as product of cell current and voltage:

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.

24 V

24 V

°C

Field bus

Voltage VoltageString 1 ... String n ...

Current Current

max. 800 mField bus

m/s w/m2



Device overview

Module Input Output Page

Sens

or

Volta

ge

Cur

rent

Sign

alVo

ltage

Sign

alC

urre

nt

Pt10

0

Dig

ital-O

ut

Inte

rnal

(SPI

)

Mod

bus

RS

485

CA

NIPV Voltage 5

IPV Current 5

IPV Signals AD 6

IPV Signals D 6

IPV Communication 7

Accessories 8

Standard, Optional, per type of sensorMistakes reserved, technical specifications subject to change without notice

The energy yield of a panel is determined by its cell with the lowest yield. Degradation of cells by internal or external influences over time, can be seen instantly from the measured curves. Depending on how many panels are combined to a string, yield losses can also be localized physically precise.The energy yield of solar panels is also affected by cell tempera-ture, as cell voltage is decreasing with increasing temperature. For reference, temperature in an array is measured exemplarily at a characteristic spot.

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

Temperature measurement can be done with a temperature trans-mitter with signal current or voltage output . Pt100 sensors can be used directly with optional adaptation of the AD module. Data from wind speed and irradiation sensors via signal current or voltage transmitters can also be acquired and incorporated in the monit ring of the installation.

Switching states of e.g. doors can be supervised with the digital input module. This accommodates safety aspects (security control) or shutdown of inverters.

The following listed measurement devices guarantee efficient monitoring of PV systems‘ energy yield. Further on malfunction of or in strings depending on the layout of the monitoring system can be recognized quickly, avoiding potential energy and financial losses with it.



IPV Spannung IPV Strom

IPV VoltageCharacteristicsThis 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 %

InstallationPower supply and internal bus withT-Bus connection of housing

VoltagePower screw terminal 10 mm²

Dimensions

Ordering Code1. 2. 3.

IPV - - -

1. Input1 1 channel

2. Measuring quantity1 Voltage

3. Output5 Bus (internal)

IPV CurrentCharacteristicsThis 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 %


CurrentPower screw terminals 10 mm²,contactless via feed through

Dimensions


IPV - - -

1. Input2 2 channels (with power connector)3 2 channels (contactless)

2. Measuring quantity2 Current


pi-ma-ipv_u_i_e V1.2-00

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IPV Signale AD IPV Signale D

IPV Signals ADCharacteristicsThis 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


Signals via screw terminal 2.5 mm²

Dimensions


IPV - - -

1. Input2 2 channels analog and digital

2. Measuring quantity3 Analog-I and Digital4 Analog-Pt100 and Digital5 Analog-U and Digital


IPV Signals DCharacteristicsThis 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

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


Dimensions


IPV - - -

1. Input8 8 channels digital

2. Measuring quantity6 Digital


pi-ma-ipv_add_e V1.2-00

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IPV Kommunikation

IPV Signals ADCharacteristicsThis 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



Dimensions


IPV - - -

1. Input2 2 channels analog and digital

2. Measuring quantity3 Analog-I and Digital4 Analog-Pt100 and Digital5 Analog-U and Digital


IPV Signals DCharacteristicsThis 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

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


Dimensions


IPV - - -

1. Input8 8 channels digital

2. Measuring quantity6 Digital


pi-ma-ipv_add_e V1.2-00

1

IPV CommunicationCharacteristicsThis 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)

InstallationPower 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


IPV - - -

1. Input5 Bus (internal)

2. Measuring quantities9 all

3. Output7 CAN bus8 Modbus RS485

pi-ma-ipv_k_e V1.2-00

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Zubehör

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

pi-ma-ipv_zub_e V1.10-00

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GHM GROUP International

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Visit us at: www.ghm-group.de

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Headquarter

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