Overriding string length configuration

[Mohammed Sukhtian]

Hello,

I am facing an issue with a client , where they want to investigate if 30 modules per string is possible , the combination of Huawei 330KTL-H1 and Tongwei 715Wp TWMNF-715WP vs Jinko Solar JKM-710Wp 66HL5-BDV-710N , the project is Mallorca-Spain, using trackers.

Huawei explains that PVsyst relies only on temperature for string length calculation , while Fusion solar combines temp. + Irradiance + Diode effect, and thus allowing 30 Modules per string. 

 

I would like to know if there is a way to override the string length in Pvsyst cause its not allowing me to simulate this scenario.

 

 

looking forward to hearing from you

Kind regards

M.A. Sukhtian

[Linda Thoren]

Hello,

You set the Lower temperature for Absolut Voltage limit in the Project Settings, Design conditions window.

Kind regards 

[Mohammed Sukhtian]

Hello Linda,

will this have any impact on the panel performance in the simulation? in my example I have to rise the temperature to 20 deg C , to be able to increase the string length to 30. while in practical conditions the lowest temperature is 5 deg C.

Thanks

[Linda Thoren]

Hi,

Changing these values in the project settings will not affect the simulation results — it will only have an impact in the triggering of the error message. The error message is designed to protect the inverter from potential damage when the absolute maximum input voltage is exceeded. In this situation, there is a real risk of damaging the inverter.