An Hbridge inverter connects a DC power source to the grid through an interfacing
An Hbridge inverter connects a DC power source to the grid through an interfacing inductance of 5mH. The grid is 230V, 50Hz with a variance of +10% and6% on the supply voltage. The rated generating power is 3kW at unity power factor to the grid.
a)What is the minimum required DC voltage at the input of the Hbridge if the maximum power flow from the DC source to the grid is 3kW at unity power factor?
b)How does the load angle of the inverter output voltage relative to the grid vary as the supply voltage changes from maximum to minimum value, and the delivered power varies from zero to rated power?
c)Determine the required range of modulation index if the input DC voltage is 380V.
d)What is the rated RMS current of the inverter?

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Solution: An Hbridge inverter connects a DC power source to the grid through an interfacing