Plz guys I need help for this one A single-phase neighborhood solar PV farm has
ID: 2265971 • Letter: P
Question
Plz guys I need help for this oneA single-phase neighborhood solar PV farm has 6 kW rated solar array and is connected the power grid via. DC-AC inverter. The equivalent resistance of the DC side is 0.22 and assume the inductor is large enough such that the DC current is ripple free. Assume the Thyristors used for the full bridge Initially, the DC output from the solar array is 3 kW and to ensure maximum power transfer the solar array voltage is kept at 150V dc. To ensure maximum power transfer to the grid the Thyristor firing angle is kept at 141.5o Part A: Determine the DC current a) b) Determine the rms voltage for the AC side under this condition. Part B: The sudden cloud cover reduced the solar power output to 1.2 kV and the voltage was changed to 120V to ensure maximum power is harvested. AC operating conditions did not change (same AC rms voltage). Determine the new DC current If the AC rms voltage did not change, determine the new firing angle for maximum power transfer a) b) Part C: Graduate Students Only Write a control algorithm based on parts A and B to control the fining angle of the inverter for maximum power transfer at any given time. a)
Explanation / Answer
Part A.
a) DC power = 3kW
DC voltage = 150V
Dc current = DC Power / DC voltage
= 3000W/150V
= 20A