Talk:Ultra-high-voltage electricity transmission in China
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Explanation[edit]
"UHVDC, referring to +/-800KV". Is this a three-wire system with an earthed neutral, one pole at +800KV and the other at -800KV? Biscuittin (talk) 21:55, 3 October 2009 (UTC)
- I think it is a mid-earth system, but without an earth wire, see High-voltage_direct_current#Bipolar. Biscuittin (talk) 08:58, 4 October 2009 (UTC)
Explanation needed[edit]
"UHVDC 12 pulses bipole circuit". Could we please have an explanation of this? I am puzzled by the use of pulsed DC because it would have similar characteristics to AC, so why not use AC? Biscuittin (talk) 08:39, 4 October 2009 (UTC)
- OK, it refers to the rectification circuit, see High-voltage_direct_current#Rectifying_and_inverting_systems. Biscuittin (talk) 08:55, 4 October 2009 (UTC)
Place names[edit]
I am not very familiar with Chinese place names. If I have made any errors in the links, please correct them. Biscuittin (talk) 17:15, 4 October 2009 (UTC)
Experimental 1333 kV powerline at Celilo Converter Station[edit]
Who knows more about this? Was it designed for a voltage of 1333 kV between conductors or for such a voltage to ground? —Preceding unsigned comment added by 91.46.252.251 (talk) 12:56, 7 October 2009 (UTC)
efficiency[edit]
This sentence is not necessarily correct: "Another issue is efficiency. Using combined heat and power at user end is more energy efficient than using power from long distance transmission lines." You could equality argue that you just want electricity, and you use that electricity to run a heat pump. If the heat pump has a COP of more that 3 and the loss in the line is about 10% then a heat pump is more efficient that central heating. —Preceding unsigned comment added by Vifteovn (talk • contribs) 21:45, 29 April 2011 (UTC)