Electrical engineering (EET301)

A DC link has a loop resistance of 100 and is connected to transformer giving secondary voltage of 120 kV at each end. The bridge connected converter operates as follows.

Rectifier alpha = 15 deg x = 15Omega

Inverter delta_{0} = 10 deg r = 15 ^ (o) x = 15Omega

Allow 5º Margin on 80 and 8 calculate the direct current delivered if inverter operates on constant ẞ control.

A bridge connected rectifier is fed from 15.6/220101 transformer. Determine the DC output voltage whey the commutation angle is 15° and delay angle

(4)0

(b) 30

commend on the effect of delay angle

A rectifier side of HVDC substation has a no load ideal DC voltage of 276.75kv The DC current is 1.5kA. The actual DC voltage is 250kv. Calculate the reactive power absorbed by rectifier side. Also the inverter side of same HVDC system is at actual DC voltage of 246.25kv The No load ideal DC voltage is 275.53kv Calculate the Reactive Power absorbed by inverter side.