Lehrstuhl für Elektrische Maschinen und Antriebe

Real-time data


Sum:

Produced energy:
kWh


Daily energy:
Wh


Power:
W


Current:
A


Frequency:
Hz


CO2 savings:
kg

Phase values:

Line conductor L1:

Voltage:
V

Current:
A

Active power:
W

Reactive power:
var

Apparent power:
VA

Power factor:



Line conductor L2:

Voltage:
V

Current:
A

Active power:
W

Reactive power:
var

Apparent power:
VA

Power factor:



Line conductor L3:

Voltage:
V

Current:
A

Active power:
W

Reactive power:
var

Apparent power:
VA

Power factor:


Verkettete Spannungen:

Voltage L1-L2:
V


Voltage L2-L3:
V


Voltage L1-L3:
V

Symmetrical components:

Co-system:
V
A


Opposite system:
V
A


Null system:
V
A

Sum:

Global irradiance::
W/m²


Outdoor temperature:
°C


Power controller::


Inverter:

Field 1:
WR1: W
WR2: W
W/Wp: % Field 1:



Stringpower WR1 - String 1/String 2:
Fehler beim Anzeigen

Stringvoltage WR1 - String 1/String 2:
Fehler beim Anzeigen

Stringpower WR2 - String 1/String 2:
Fehler beim Anzeigen


Stringvoltage WR2 - String 1/String 2:
Fehler beim Anzeigen

Invertertemperature - WR1/WR2:
Fehler beim Anzeigen

Field 2:
WR3: W
WR4: W
W/Wp: % Field 2:



Stringpower WR3 - String 1/String 2:
Fehler beim Anzeigen

Stringvoltage WR3 - String 1/String 2:
Fehler beim Anzeigen

Stringpower WR4 - String 1/String 2:
Fehler beim Anzeigen


Stringvoltage WR4 - String 1/String 2:
Fehler beim Anzeigen

Invertertemperature - WR3/WR4:
Fehler beim Anzeigen

Field 3:
WR5: W
WR6: W
W/Wp: % Field 3:



Stringpower WR5 - String 1/String 2:
Fehler beim Anzeigen

Stringvoltage WR5 - String 1/String 2:
Fehler beim Anzeigen

Stringpower WR6 - String 1/String 2:
Fehler beim Anzeigen


Stringvoltage WR6 - String 1/String 2:
Fehler beim Anzeigen

Invertertemperature - WR5/WR6:
Fehler beim Anzeigen

Field 4:
WR7: W
WR8: W
W/Wp: % Field 4:



Stringpower WR7 - String 1/String 2:
Fehler beim Anzeigen

Stringvoltage WR7 - String 1/String 2:
Fehler beim Anzeigen

Stringpower WR8 - String 1/String 2:
Fehler beim Anzeigen


Stringvoltage WR8 - String 1/String 2:
Fehler beim Anzeigen

Invertertemperature - WR7/WR8:
Fehler beim Anzeigen



WR = Inverter. Two inverters feed per module field.
W/Wp = Percentage power of the module field in relation to its peak power.






FAQ:

  • Why does the system not reach its maximum output despite bright sunshine?
    The installed power of the system is calculated from the power data and the sum of the modules. In fact, some parts of the plant are temporarily shaded to preserve the healthy trees of the campus. of the campus. In addition, the output refers to optimal conditions at the modules. On sunny summer days, the photovoltaic modules heat up and thus reduce their efficiency. Additionally, the aging of the modules causes a slight loss of power over time. A realistic maximum power considering the mentioned circumstances is 97 kW. This value is the reference value for the bar graph display on the website.
  • Why are the values sometimes updated every second, sometimes not at all?
    In order to provide a resource-saving web presence, the values are only updated when the window with the website is active. As soon as the window on your PC is in the background, for example when working in another application, the values are no longer loaded from the server every second. With a click on the website, it changes back to the live view.
  • Why do the "Inverter" and "System values" sections not update as fast as the rest of the data?
    The displayed data comes from different sources and is processed by different servers. The values in the "Inverter" area must first be read out individually from the inverters via a data bus, which is why the display is slightly delayed. The values "String voltage" and "System temperature" are read out via the server of the data logger and update themselves in a five-minute cycle.
  • What does night operation mean?
    When solar irradiation is so low that the system can barely meet its own demand, the inverters switch to standby mode. In order not to consume any significant energy in the dark, the control technology and data communication are then switched off.
  • What are control interventions?
    For grid management reasons, the grid operator can remotely control the plant via ripple control signal. For this purpose, the active power of the plant can be reduced to just under 70kW, 35kW and 0kW. During the test operation of the NEmo project, the SmartRTU control system can also make power reductions in the same increments.
  • Why do the values from the graphs not match the live view?
    The data logger, which stores the feed-in data, was installed a few weeks later than the energy meter. Therefore, not all values since the installation of the grid connection can be displayed in the graphs. A temporal offset is also caused by the fact that the data logger displays the values in a five-minute cycle and uploads them to the server in a fifteen-minute cycle, so the graphs displayed can be up to a quarter of an hour old. The graphs are thus mainly used for long-term display.
  • More information about #UniWuppertal: