Wrong units for simulations considering reactive power - V 8.0.9

[Patricio Segura]

Good evening,

I've been working on a simulation for a grid connected self consuption pv plant. I considered a power factor of 0.9 in order to take into account the needs of reactive power and the losses diagram shows the results with, at least in my opinion, the wrong units and the wrong name:

The "Apparent energy to the grid" should be "Reactive energy to the grid", and the units MVARh

Also, the results summary part has an error too:

The "Apparent energy" should be "Reactive energy" and the units MVARh/year; if it has to show the Apparent energy, the absolute value showcased should be higher than the absolute value of "Produced Energy".

I'm using the 8.0.9 version of the software.

I guess that this a bug cause I've made other versions of this same project and the errors persist.

Thanks in adavance for your answer.

[Luca Antognini]

Hello,

Thank you for reporting those behaviors. I believe there are several issues, which I will report for future correction, but my interpretation is different:

- There are indeed a unit problem with the apparent and reactive energy, which will be corrected in future version. In the report, the switching to Mega watt hour instead of kilo watt hour doesn't work well for those quantity. The numerical value displayed is correct by the "k" in the unit doesn't switch yet to and "M". You can change the unit of the report for a consistent display in "kWh" by going to "Report > Report Options > Final Report Options > Energy Units > kWh".

- The name of reactive and apparent energy are correctly displayed in the report. Though it seems to me that you didn't allow "solar injection into the grid" in the "self-consumption" window. Therefore, no active energy is transferred to the grid from the solar production and reactive and apparent energy are equal: 

Note here that the reactive component is computed based on the solar energy available at the inverter's output, as E_Reac = E_InvOut * Tan(phi). Then the apparent energy is E_app = sqrt (E_Reac*E_Reac + E_Act*E_Act)

Let me know if this makes sense for you.

As I see that you are trying to simulate a scenario with a large consumption, you were maybe looking for a different behavior of the reactive energy.

Luca