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Two six pulse converters used for bipolar HVDC transmission system, are rated at 1000 MW, +- 200 kV. What is the dc transmission voltage?

Two six pulse converters used for bipolar HVDC transmission system, are rated at 1000 MW, +- 200 kV. What is the dc transmission voltage? Correct Answer 400 kV

As the link is bipolar, the total voltage transmitted will 200 + 200 kV.

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