An HVDV bipolar link using a 6-pulse converter is supplying power of 500 MW at 100 kV. The rectifier station is working at a delay angle a = 15. Estimate (a) No-load DC voltage,

(b) AC voltage on the converter side of the transformer (i.e. at sending end),

(c) Current on the secondary side of the converter transformer,

(d) Transformer secondary rating,

(e) Peak inverse voltage,

(f) Peak-to-peak ripple.