Re: DC used in power distribution

miso@xxxxxxxxx wrote in
news:1187496313.228421.310930@xxxxxxxxxxxxxxxxxxxxxxxxxxxx:


Thinking about HV distribution, I don't recall ever seeing a
transformer on a tower, so I guess DC is the norm.

With HV, the power levels are high - you won't see a high power
transformer on a pole - they put those in substations.



Well yes, I know that, but I don't believe I've seen a substation all
by it's lonesome. That is, towers, then down to the substation, then
more towers. I always thought the substation was a distribution point.


They exist.

The convert the 500KV from distant generating stations to 230KV for
distribution in a region. I know the Toronto area has four; Milton,
Cherrywood, Markham, and Clearview. There is about a dozen or more
stations that convert 230KV to the local ditribution (115 or 66KV), to
neighborhood substations or direct to industry.
.

Relevant Pages

  • Re: DC used in power distribution
    ... transformer on a tower, so I guess DC is the norm. ... the power levels are high - you won't see a high power transformer ... Well yes, I know that, but I don't believe I've seen a substation all ... That is, towers, then down to the substation, then ...
    (sci.electronics.design)
  • Re: DC used in power distribution
    ... voltage DC. ... transformer on a tower, so I guess DC is the norm. ... Well yes, I know that, but I don't believe I've seen a substation ... That is, towers, then down to the ...
    (sci.electronics.design)
  • Re: About electric energy
    ... The rule of thumb is that there is about 10% loss in transmission. ... high voltage from the generator to the substation, ... Circuit breakers on each transformer trip when the current of that transformer ...
    (sci.energy.hydrogen)