Interconnectors: More Green Stupidity?

[neiphin]

but op dosent mention undersea cables
he does however show that undersea cables can be affected also

cables already functioning

The Single Electricity Market (SEM) for the island of Ireland went live on 1st November 2007. The current electricity market in Great Britain - the British Electricity Trading and Transmission Arrangements (BETTA) came into effect in April 2005. The Moyle Interconnector provides the vital link for trade between the new electricity markets of Ireland and Great Britain.


now the voltage in the transmission and distribution lines north and south are different
north of ireland--- republic of ireland
220-240 lv----------220-240 lv
11kva--------10 and 20 kva
33kva--------38kva
and so on and so on

so pat is it just a matter of sticking two lines together
33kva and 38kva , what happens genius
pat the spuffer

[harshreality]

Wow so the cops knew internal affairs was in on it all along! ............sorry i get bored and make stuff up

[Pat Gill]

but op dosent mention undersea cables
he does however show that undersea cables can be affected also

According to our friends in the "renewable" energy rackets, large amounts of electrical interconnection between Ireland and the UK are a "no brainer".

Their belief system goes something like this. Ireland has a "world class" wind resource. Therefore she should install huge amounts of wind capacity. When the wind is blowing Ireland can export the excess power to the UK. When it is not blowing, we can generate our own power (using gas) or import power (gas, coal, nuclear) from the UK. A large amount of interconnection (many GW) is essential, apparently.

As a business model, this is pure gombeenomics: guaranteed to lose money. But it is less well known that interconnection also exposes us to massive geophysical risk. Let me explain.




Solar storms bombard the earth with charged particles which cause the earth's magnetic field to fluctuate. From Faraday's law, this induces electrical currents, so-called "ground currents" around the earth.

Normally these are small and harmless currents. However, the installation of a highly conductive grid over large distance changes this. Larger currents are possible, which greatly increases the risk to our grid from solar storms.

Geomagnetically induced current - Wikipedia, the free encyclopedia

Loss of the grid for even a few days could take a massive human and economic toll. The green "no-brainer" policy of extreme interconnection is expensive. But it is also dangerous and stupid.

I advised GIG to have a rethink about how the phenomenon might affect a HVDC line as this is the only form of interconnection technology suitable for connecting the Irish and British grids.

At one node of a HVDC link is a converter station to convert AC to DC and at the other end is another converter station to convert DC back to AC for onward transmission. Transformers cannot be used for DC and each converter station contains large amounts of capacitors and power electronics to effect the conversion.

Now from the link in the OP we find the following.

GIC are often described as being quasi direct current (DC), although the variation frequency of GIC is governed by the time variation of the electric field.

And then

Power transformers have a magnetic circuit that is disrupted by the quasi-DC GIC: the field produced by the GIC offsets the operating point of the magnetic circuit and the transformer may go into half-cycle saturation. This produces harmonics to the AC waveform, localised heating and leads to high reactive power demands, inefficient power transmission and possible mis-operation of protective measures. Balancing the network in such situations requires significant additional reactive power capacity.^[3] The magnitude of GIC that will cause significant problems to transformers varies with transformer type. Modern industry practice is to specify GIC tolerance levels on new transformers.

And then we find

GIC risk can, to some extent, be reduced by capacitor blocking systems

The damage to electrical grids from GIC occurs when AC transformers are fed with large amounts of DC.

I wouldn't go so far as to say that GIC cannot affect a DC transmission line but its inherent characteristics means that any effect would be minimal.

The AC grids on either side of the interconnector would be damaged a well before any damage occurs to the connecting DC line.

Hence no wet knicker moments.

[Pat Gill]

but op dosent mention undersea cables
he does however show that undersea cables can be affected also

cables already functioning

The Single Electricity Market (SEM) for the island of Ireland went live on 1st November 2007. The current electricity market in Great Britain - the British Electricity Trading and Transmission Arrangements (BETTA) came into effect in April 2005. The Moyle Interconnector provides the vital link for trade between the new electricity markets of Ireland and Great Britain.


now the voltage in the transmission and distribution lines north and south are different
north of ireland--- republic of ireland
220-240 lv----------220-240 lv
11kva--------10 and 20 kva
33kva--------38kva
and so on and so on

so pat is it just a matter of sticking two lines together
33kva and 38kva , what happens genius
pat the spuffer

I would use a phase shifting transformer as it allows control of power flow.

But what has this to do with the OP or HVDC.

[neiphin]

All of your links relate to overhead AC transmission lines.

Any interconnector between Ireland and the UK or Europe will use HVDC technology.

Still no sign of the merest damp patch in the knickers.

I would use a phase shifting transformer as it allows control of power flow.

But what has this to do with the OP or HVDC.

you brought interconnectors up

[Pat Gill]

you brought interconnectors up

No neiphin, the OP did.

According to our friends in the "renewable" energy rackets, large amounts of electrical interconnection between Ireland and the UK are a "no brainer".

[Nemesiscorporation]

According to our friends in the "renewable" energy rackets, large amounts of electrical interconnection between Ireland and the UK are a "no brainer".

Their belief system goes something like this. Ireland has a "world class" wind resource. Therefore she should install huge amounts of wind capacity. When the wind is blowing Ireland can export the excess power to the UK. When it is not blowing, we can generate our own power (using gas) or import power (gas, coal, nuclear) from the UK. A large amount of interconnection (many GW) is essential, apparently.

As a business model, this is pure gombeenomics: guaranteed to lose money. But it is less well known that interconnection also exposes us to massive geophysical risk. Let me explain.




Solar storms bombard the earth with charged particles which cause the earth's magnetic field to fluctuate. From Faraday's law, this induces electrical currents, so-called "ground currents" around the earth.

Normally these are small and harmless currents. However, the installation of a highly conductive grid over large distance changes this. Larger currents are possible, which greatly increases the risk to our grid from solar storms.

Geomagnetically induced current - Wikipedia, the free encyclopedia

Loss of the grid for even a few days could take a massive human and economic toll. The green "no-brainer" policy of extreme interconnection is expensive. But it is also dangerous and stupid.

Straight question requring a straight answer.

Why do you oppose everything that might advance Ireland in the slightest?

Please don't patronise me by denying that is your stance, as it clearly is.

Ireland needs HDVC connectors to Scotland, Wales England and France.

[GreenIsGood]

Sure. The NASA report is described here:

Severe Space Weather--Social and Economic Impacts - NASA Science

According to the report, power grids may be more vulnerable than ever. The problem is interconnectedness. In recent years, utilities have joined grids together to allow long-distance transmission of low-cost power to areas of sudden demand. On a hot summer day in California, for instance, people in Los Angeles might be running their air conditioners on power routed from Oregon. It makes economic sense—but not necessarily geomagnetic sense. Interconnectedness makes the system susceptible to wide-ranging "cascade failures."

A small local grid ~ 100km in scale may be unaffected by a solar storm which generates huge currents a large grid ~ 1000km.

It is a fact that interconnection increases Ireland's vulnerability to geomagnetic ground currents.

[Radix]

According to our friends in the "renewable" energy rackets, large amounts of electrical interconnection between Ireland and the UK are a "no brainer".

As a business model, this is pure gombeenomics: guaranteed to lose money. But it is less well known that interconnection also exposes us to massive geophysical risk. Let me explain.

Solar storms bombard the earth with charged particles which cause the earth's magnetic field to fluctuate. From Faraday's law, this induces electrical currents, so-called "ground currents" around the earth.

Normally these are small and harmless currents. However, the installation of a highly conductive grid over large distance changes this. Larger currents are possible, which greatly increases the risk to our grid from solar storms.

Loss of the grid for even a few days could take a massive human and economic toll. The green "no-brainer" policy of extreme interconnection is expensive. But it is also dangerous and stupid.

The interconnecting "highly conductive grid" of which you speak, is insulated and buried in a sea bed.

Any additions to same will be similarly done.

What are you talking about?

Could you not put your brain in gear before engaging your thread starter facility?

P.ie obviously doesn't have any engineers on the mod team.

Zoo please someone..........

[GreenIsGood]

The interconnecting "highly conductive grid" of which you speak, is insulated and buried in a sea bed.

Any additions to same will be similarly done.

What are you talking about?

Could you not put your brain in gear before engaging your thread starter facility?

P.ie obviously doesn't have any engineers on the mod team.

Zoo please someone..........

nothing happens to the cable, you stupid fool.