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
& i8 p8 l  v; h6 A* i9 `" @, ?to keep pace with surging demand, an event was quietly taking place on the shores of the Baltic
. E1 v1 s, q: g6 Y5 DSea 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
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
. I) }. Z( V& ]technology that still harbored some weaknesses. One was the difficulty in predicting the
  A) V8 C! |# k$ Q/ x  Rbehavior of the valves themselves. As they could not always absorb the reverse voltage,
5 A1 [# q5 q3 a# q! i* E5 N5 Rarc-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

一起分享~~~~~~~~

laocheng88877

Fundamentals of Power Electronics 传到共享邮箱了

5 i* q5 W2 C. t. h, K5 bpower system stability and control----canada, kundar
5 [9 l) W$ u  e$ X; D* _
4 i( @" D0 |5 B7 ]" _发上来

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！