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Big difference between simulation and real testbench

Big difference between simulation and real testbench

Hi,

I am using multisim 14.1. Preparing a simulation of a 3-phase- system for students, the results don´t match measurement on our implemented testbench. 

 

Any ideas?

 

regards

blanne

3-phase-system.jpg

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Re: Big difference between simulation and real testbench

Hi blanne,

 

Did you have a chance to measure the real values of capacitance and inductance of the components you are using at you testbench? It looks like they may not have exactly 1.5Ohms and 100uF as you have set in the simulation. That would explain why readings for second and third phases are most inaccurate.  

 

Best Regards. 

 

---
CLA,CTD,CLED
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Re: Big difference between simulation and real testbench

Hi Mateusz,

the difference is not related to tolerances. It seems to be a problem of Multisim 14, especially in calculating the current of the zero conductor. Using my old version of Multisim 10, I get results very close to the calculation.

 

Best Regards 

 

 

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