Re: [EnergyPlus_Support] Fatal Error: Photovoltaic (EquivalentOne-Diode) ..

Dear JosÃ© Marcos,

Thank you ?

That was the first mistake I did. But with the help of Mr. Xiang Jing ZHANG, I was able to convert the temperature coefficients from [%/k] to [A/K and V/K] â?¦ Unfortunately, even with that done I still got the same error but with different numbers:

** Severe ** EquivalentOneDiode Photovoltaic model failed to find maximum power point

** ~~~ ** Numerical solver failed trying to take exponential of too large a number

** ~~~ ** Check input data in PhotovoltaicPerformance:EquivalentOne-Diode

** ~~~ ** VV (voltage) = -7519.13932

** ~~~ ** II (current) = 0.00000

** Fatal ** FUN: EnergyPlus terminates because of numerical problem in EquivalentOne-Diode PV model

I couldnâ??t figure out what I did wrong? Is it because I entered default valuess in some of the table boxes together with values from catalogue?? Kindly find attached ?

----------------------------------------------------

Best Regards,

Sarah Al Jarallah

From: JOSE MARCOS CHAVES BARBOSA <zemarcoscb@xxxxxxxxxxxx>
To: "EnergyPlus_Support@xxxxxxxxxxxxxxx" <EnergyPlus_Support@xxxxxxxxxxxxxxx>
Sent: Sunday, February 17, 2013 9:46 AM
Subject: Re: [EnergyPlus_Support] Fatal Error: Photovoltaic (EquivalentOne-Diode) ..

Hello.

Perhaps you should look to the temperature coefficients. Make sure that the units are consistent comparing the datasheet data with the EP data.

Here, with the corrected values it could run a simulation (values from the datasheet which you sent converted into [A/K] and [V/K]), while with the values directly from the datasheet (both in [%/K]) I got this error message:

** Severe ** EquivalentOneDiode Photovoltaic model failed to find maximum power point

** ~~~ ** Numerical solver failed trying to take exponential of too large a number

** ~~~ ** Check input data in PhotovoltaicPerformance:EquivalentOne-Diode

** ~~~ ** VV (voltage) = 24.62826

** ~~~ ** II (current) = -3084.79299

** Fatal ** FUN: EnergyPlus terminates because of numerical problem in EquivalentOne-Diode PV model

Obs:

>Probably (almost sure) my IDF file is diferent than yours.

>Sorry for my English.

JosÃ© Marcos

CEFET-MG / Brasil

De: Sarah Al Jarallah <sarahalghamdi@xxxxxxxxx>
Para: "energyplus_support@xxxxxxxxxxxxxxx" <energyplus_support@xxxxxxxxxxxxxxx>
Enviadas: SÃ¡bado, 16 de Fevereiro de 2013 16:52
Assunto: [EnergyPlus_Support] Fatal Error: Photovoltaic (EquivalentOne-Diode) ..

Dear all,

At the mean time, Iâ??m modeling a single-family house with PV system by using the (PhotovoltaicPerformance:EquivalentOne-Diode) type .. At first, I tried the PV characteristics given in example file "GeneratorwithPV" where the simulation went smoothly and I got results. But when I used PV characteristics(attached) from a catalogue I got fatal error:

** Severe ** EquivalentOneDiode Photovoltaic model failed to find maximum power point

** ~~~ ** Numerical solver failed trying to take exponential of too large a number

** ~~~ ** Check input data in PhotovoltaicPerformance:EquivalentOne-Diode

** ~~~ ** VV (voltage) = -7519.13932

** ~~~ ** II (current) = 0.00000

** Fatal ** FUN: EnergyPlus terminates because of numerical problem in EquivalentOne-Diode PV model

I would appreciate your help..

Thank you ..

-----------------------------------------------

Best Regards,

Sarah Al Jarallah