Jump to content

Aboud

Members
  • Posts

    9
  • Joined

  • Last visited

Everything posted by Aboud

  1. Many thanks martin As far as I understand, the more the load value is closed to the PV installed capacity 'Regardless other factors like location, etc' the more PV is is directed to load? Could you mention a trick/ parameter in the software which will change the amount of PV to load when modified? Regards
  2. Dear All I wander how to configure the software to achieve the following: % solar used on site without storage is c.50% Kindly see the example below for a clear explanation: Total AC output: 131294kWh Direct PV to loads = 62702 kWh which corresponds to 47.8% of the Total AC output above. What I am looking for is how to tell the software to utilize 50% of Total AC output directly to the loads leave the other 50% for the storage and grid feed-in? Please let me know if you need a further info! Regards
  3. Hi Frederik, Many Thanks for your detailed explanation I have changed the configuration limits as you suggested, the 'automatic configuration' worked this time. I am not sure why the software lists many inverter although one inverter was selected. However, I am glad that the 'automatic configuration' was restored after changing the Limits. Understood. will the software warn you when 'Maximum system voltage' is exceeded as well? regardless inverter Voc as shown below. Many thanks for this information. it is very helpful indeed. Many thanks for your significant effort as well.
  4. Dear All, Could you confirm if the number of DC inlets (in pvsol model) = number of MPPT * number of strings per MPPT Example Inverter with 3 MPPT and, each MPPT can handle up to 5 strings. Will the number of DC inlets =12 inlets? Many thanks
  5. Dear Frederik, Many thanks for your quick response and detailed illustration. 1. I think the 'automatic configuration' only works when the software recognize the convenient inverter size relative to DC installed capacity (or up to specific sizing factor). I have already selected the inverter (video attached). However, 'automatic configuration' is still inactive. To be fair it is not a big problem because the software allows the simulation although a significant 'sizing factor' is introduced. According to my modest opinion, PVsol algorithm should activate an 'automatic configuration' regardless the 'sizing factor' and suggest the maximum modules per MPPT as normal (when inverter size is convenient). Also, as long as 'Crossing out' sign is introduced next to the inverter, automatic configuration won't work. 2. According to PV module specs, Voc=36.8V, Vmp=29.5V and Maximum system voltage =1000V Using Voc value (worst case scenario), 27 modules will generate 27*36.8= 993.6V < (maximum sys voltage). However, I understand this value is too close to 1000V but the inverter model used (as attached above) can handle up to 1100V per MPPT and therefore the simulation could proceed regardless the warning message below: To be fair I am 100% satisfied with the software but I think some minor but I think some minor modifications with the algorithm will lead to outstanding performance. Many thanks in advance Frederik, You did a significant effort!!!! 2022-08-19-14-49-13.mp4
  6. Hi Frederik, Many thanks for your interest and your description. I have tried the same approach you mentioned and the simulation is finished Even if using extreme values. Kindly check the example below (sizing factor=51.7) Total installed DC =41.4 kWp / Inverter capacity 80kWac. I have 2 queries 1. When inverter size > PV system size as shown above, Why the software prohibits the proper MPPT configuration and let the user to configure it manually?!! the inverter can definitely host the PV system and you can clearly notice the 'Auto configuration' is deactivated!! (regardless the X sign near the inverters whose sizes?PV system which i think it should replaced by warning symbol) 2. The inverter model above has 4 MPPTs, each can be connected to 4 strings. I was trying to apply the following configuration my question is how to configure each string in MPPT2 separately as shown above and therefore 72 Modules can be connected to MPPT2. I understand String 3 with 18 modules could lead to 'Mismatching'. However, this is not serious and the designer should decide to proceed forward. How to split MPPT strings so that I can apply the configuration above? Once again, Many thanks for your valuable reply! Many thanks in advance!
  7. Dear All, Let's imagine the following Scenario PV installed Capacity 40KWp Inverter size 80kW choosing this size for the installed DC capacity prohibits the program from finishing the simulation although the MPPT voltage and current ranges are within the allowed limit when choosing array connection! if the inverter size >>>> PV installed capacity, it shouldn't stop the program finishing the simulation. Me and the customer are aware that the Inverter size is almost double PV capacity, the reason for choosing the inverter size is there will future PV expansion up to 100kWp (DC) My comment is: PV sol should fix this bug and let the customer know the alert message without stopping the simulation. if not, this reduces the program reliability as Many customers choose a bigger inverter size for future PV system expansion. Many thanks in advance!
  8. Dear All, I have recently purchased a full license and I really like the program interface and the simple design. I wander how the program determines the power flow in each direction and which equations/models used to generate the power flow direction. I will list my queries with the aid of the diagram below -How I tell the program to stop charging the battery from the grid (blue arrow to the batter) and compensate the 'grid to bat' energy such as to utilize a portion 'PV to grid' instead ? -Which factors/equations are used to determine 'Direct PV to load'? Why 227496kWh in particular? Any suggestions / software settings to increase 'Direct PV to load'? -Which factors/equations are used to determine 'Direct PV to bat' Why 129912 kWh in particular? Any suggestions / software settings to increase 'Direct PV to bat'? -Which factors/equations are used to determine 'Direct PV to Grid' Why 769754 kWh in particular? Any suggestions / software settings to increase 'Direct PV to Grid'? I look forward to hearing from you! Many thanks in advance.
×
×
  • Create New...