A recent CIGRE document published in ELECTRA has described the potential benefits of a direct connection of generators to HVDC power converters. While many theoretical contributions have been made, no practical test data has become available so far. This paper reports on harmonic tests carried out at the Benmore end of the New Zealand HVDC link operating as a group connected scheme. It was found that the measured harmonic current levels were well below specified generator ratings. Dynamic simulation accurately predicted the harmonic currents whereas the results of a steady state formulation were less-reliable.>
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Macdonald et al. (1995) studied this question.
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