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UK Electrical Transmission System

Discussion in 'Electrical Engineering' started by Grey, Sep 3, 2004.

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  1. Grey

    Grey Guest

    I am doing some research on the UK Electrical national gird system and
    looking for lots of info.

    I am after stuff like national layout, means of control and power
    regulation, safety issues/procedures, transmission voltages and the like.

    Much appricated any info or web links.

    Thanks in advance,

  2. Don Kelly

    Don Kelly Guest

    No reason for it most of it to be sensitive- much of it is in textbooks or
    IEE journals and terrorists can surely recognise a major substation when
    they see it. I would suggest that Grahame ask the utility directly and
    would likely get more information than he can digest. .
  3. Fads

    Fads Guest

    Hey its not my fault you live in a paranoid country.

    How can you judge what the UK can or cannot put into the public domain?

    It's that sort of attitude that has got the US into the state into which it
    finds itself today.

    Or are you embarrassed because you told the original poster "don't hold your
  4. Fads

    Fads Guest

  5. Grey

    Grey Guest

    Big thanks for all this info. Most useful.

    No thanks to those people who think my surname must be "Bin Laden".

  6. It certainly is. Political climate in UK prevents building any
    more nuclear power stations, so the French build them for us
    all along their North coast, and we buy the electricity from

    It was originally installed mainly for the UK to sell electricity
    to France, but has actually used almost entirely the other way
  7. Fads

    Fads Guest

    No not when anyone disagrees with me, just when they make assumptions
    without checking the facts out.
    If any one was that intent, they could buy Ordinance Survey maps of any area
    to find such detail
  8. Beachcomber

    Beachcomber Guest

    But the US was exposed to Hitler. U-Boats struck tankers from New
    York to Cape Hattaras and the Gulf of Mexico. German Spies were
    landed on long Island. Also, many say the Vikings did invade America
    as well...

  9. Peter

    Peter Guest

    I thought it was 22kV in UK and 20kV in mainland Europe although I
    think there is some 20kV in Yorkshire.

    I think the reason that 22kV was selected is that it was the highest
    voltage (at that time) that a belted paper insulated cable could be
    designed for. Such cables failed at 33kV and were successful only
    when filled with oil or dry nitrogen. These 22kV cables would have
    been originally for subtransmission rather than 'final' high voltage
  10. daestrom

    daestrom Guest

    Trying to hide such information about things that are in plain site is a
    waste of time. Might as well try to hide a cooling tower that's visible
    from 10 miles away.

    Buy a topographical map (available many places) and it shows power lines and
    substations. Download a satellite photo and you can pick out the power
    lines. Drive around in your car on the week ends and you'll stumble across

    Terrorists are not stupid. If they want to find information about power
    lines or substations, there are easily half a dozen sources they could use
    to find it. Paranoia about reporting 'suspicious' activity in recreational
    marinas, 'hiding' information about things that are in plain site, it's all
    got to stop. The more paranoid we act, the more the terrorists win.

  11. Graham Gould

    Graham Gould Guest

    WHen Iw as working for a REC about 15 years ago there was a bit of a problem
    from the society for the two headed sheep ( somthin like that anyway) They
    tried to disrupt the UK electical network by cutting down a 400kV tower near
    to Dungeness. 25 hacksaw blades later and they left exhauseted!!! BUt the
    point is that despite the fact that power is an easy target there is not
    much evidence worldwide that this is a potential target. Unless they took
    out a lot of circuits they would not have much effect. Crash a few lorrieson
    the M25 and M1 is a whole lot easier to get top ratings in the press!

    It dosnt need us to say how easys or hard it is to disrupt the systems. But
    its got to be more that a man with a gun or a hacksaw to have any worthwhile
    effect. The evidence is clear its not done a lot! I think we are a bit lucky
    as it is fairly easy to do but would not get much headline news unless it
    was a big concerted effort.

    Cable laying contractors and builders ahev a far more likely chance of
    making thigns happen!

    As for the network diagram then it is available in the public domain ( the
    transmisison entwork is even on the OS maps and it is fairly easy to walk
    routes to see where the towers go and the cables start and end.
    There is not a lot of 400KV underground and not too much 132kV although
    there is a lot around city centres

    Vltages inthe UK are
    275 usually to 400kV spec

    66kV ( not a lot but some older stuff)

    33kV the main distribution voltage
    22kV not a lot again a legacy system

    11kV the most prolific
    6.6 quite a bit ( often out of phase with itself)
    3.5/ 2/ 2.2 and other odd bits
    then the final is 415 (ish) and 240 (ish)

    I saw the last DC rectifier in use int he South East when I started my
    training in 1972 so I doubt if there is much of that left now!!!!

    Same random not too accurate summaries! These are sumamries so dont pick me
    up on them if they are incomplete but if I have it wrong then 20 years of
    lecturing has gone out the woindow!!!!!

    The DC link is 2 dc circuits that allow power flow (cant remember the
    voltage) (france to the UK nrormally ) of around 2GW MD its DC to help
    avoid voltage control problems and help to tie the two systems together
    without having them have to haev the same frequency. It also limits fault
    current flow.

    voltage control is acheived by generators and static and rotating
    compensators etc to provide the VAR control and tap changers manage the
    final delivery of voltage.

    cables and lines each have a different effect on voltage control

    Bored now so going to bed!
  12. John C

    John C Guest

    As a Power engineer on Standby and still operational I have read the last
    several posts with much merriement.

    seen it. Usually a little brat with an air rifle making sparks....

    Chain Man..
    thrown over the line

    Fire man.

    Under the cable boxes in the substations

    all guarenteed to switch of a large area for several hours!!!

    have fun!!!!


    the two headed sheep shagger society is still in operation!!!!!
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