50 years HVDC ABB – from pioneer to world leader

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In 1954, at a time when much of Europe was busy expanding its electricity supply infrastructure
to keep pace with surging demand, an event was quietly taking place on the shores of the Baltic
Sea that would have a lasting effect on long-distance power transmission. Four years earlier, the
Swedish State Power Board had placed an order for the world’s first commercial high-voltage
. E6 X' V! j; Q% ?2 ?direct current (HVDC) transmission link, to be built between the Swedish mainland and the island
of Gotland. Now, in 1954, it was being commissioned.-%-97570-%--%-11576-%--%-11570-%-

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Mercury-arc valve based HVDC had come a long way in a short time, but it was a
) ^+ X9 f- `: i( \1 ^# d# Ltechnology that still harbored some weaknesses. One was the difficulty in predicting the
behavior of the valves themselves. As they could not always absorb the reverse voltage,
; ]8 }, O' `6 D# l3 W( darc-backs occurred. Also, mercury-arc valves require regular maintenance, during which
absolute cleanliness is critical. A valve that avoided these drawbacks was needed.

jessie_hyj

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laocheng88877

Fundamentals of Power Electronics 传到共享邮箱了
; v% r' N8 I0 `3 T
% c( h' K& X: ?0 a$ G. ~- cpower system stability and control----canada, kundar

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baoshunxian

ABB公司的确是电力行业的龙头，先锋，有太多的方面值得我们去学习了！