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3-level SPWM inverter
Hi everybody. I´m new in these forums but i was following you because i´m working in my project and i saw that you hace some useful topics ( sorry for my english)
I´m working in a simulink model of a three level SPWM inverter DC-AC. But i have problems in my design because when i simulate the system the output of one phase (phase a) it´s not symmetrical to 0.
i mean for example the maximun value of the current could be 2kA and the minimun 4kA. The rest of the phases work good i don´t know why?
The system is a three level inverter conected to a grid.
Vdc:1200
Vl_l grid =690.
And in the middle i put a filter LcL filter.
The thing is that i abserved that if i put more resistance in the circuit for example 0.02 ohms per phase more or less the system works perfectly. But know the values calculated for the filter are around 4e-4 ohms ad i can´t change them.
One friend told me that it could be possible because the saturation of the inductances because i fed directly 1200 volts to the inductances.
I´m working in plecs.
Thank you for your time... regards...
Thank u for your time.
Hi everybody. I´m new in these forums but i was following you because i´m working in my project and i saw that you hace some useful topics ( sorry for my english)
I´m working in a simulink model of a three level SPWM inverter DC-AC. But i have problems in my design because when i simulate the system the output of one phase (phase a) it´s not symmetrical to 0.
i mean for example the maximun value of the current could be 2kA and the minimun 4kA. The rest of the phases work good i don´t know why?
The system is a three level inverter conected to a grid.
Vdc:1200
Vl_l grid =690.
And in the middle i put a filter LcL filter.
The thing is that i abserved that if i put more resistance in the circuit for example 0.02 ohms per phase more or less the system works perfectly. But know the values calculated for the filter are around 4e-4 ohms ad i can´t change them.
One friend told me that it could be possible because the saturation of the inductances because i fed directly 1200 volts to the inductances.
I´m working in plecs.
Thank you for your time... regards...
Thank u for your time.