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11kV as distribution voltage for The Hongkong Electric Co., Ltd. (HEC) was first introduced in 1961, when the system peak demand was just 114 MW. Forty years later, the same distribution voltage has to support a system peak demand over 2500 MW with area load density over 100MVA/km2 on average and 250MVA/km2 in Central Business District on Hong Kong Island respectively. With such high area load density,...
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