Innovative Transmission System Integration & Operation

 Large-scale demonstration of innovative transmission system integration and operation solutions for (inter)connecting renewable electricity production. Transmission grid topic in Call FP7-ENERGY-2013-2 Date of publication : 10 July 2012 Deadline for proposals submission : 24 January 2013  ACTIVITY ENERGY.7: SMART ENERGY NETWORKS Indicative budget: EUR 45 million Topic ENERGY.2013.7.2.3: Large-scale demonstration of innovative transmission system integration […]

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Effect of brutal cutoff of wind capacity – Spanish Wind ramping, intermittency back up

http://www.carboncommentary.com/2009/11/15/853 Spain’s variable wind and stable electricity networks Sunday 15 November 2009 in uncategorized by Chris Goodall One of the frequent criticisms of wind energy is that national distribution systems (‘the grid’) cannot cope with large number of turbines because of the variability and unpredictability of their output. Grids need to match supply and demand […]

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Dr Gregor Czisch to talk at Synergistic SuperGrid for Transmitting Energy Overseas 2011 Collecting the SuperGrid Puzzle & Moving Closer to Reality

    CompanyNameDesignationCountry Climate ParliamentNicholas DunlopFounder and Secretary-GeneralUnited Kingdom Siemens Transmission and DistributionMatthew KnightBusiness Development ManagerUnited Kingdom Friends of the SupergridAna AguadoCEOBelgium Commission for Energy RegulationPaul BrandonManager – Electricity TransmissionIreland The University of GlasgowEnrique AchaProfessor of Electrical Power systems, Department of Electronics and Electrical EngineeringScotland ABBLars WeimersChief Engineer Marketing HVDC SystemsSweden DESERTECGerry WolffCoordinatorUnited Kingdom Institute […]

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Prospects for Trans-Atlantic Undersea Power Transmission

Prospects for Trans-Atlantic Undersea Power Transmission harryc@ontarioeast.net Submarine Power Cable Precedents: For several decades, submarine power cables have carried electric power across short distances under bodies of water within the same nation. Some examples include the cable from mainland Italy to the offshore Mediterranean islands of Corsica and Sardinia. Similar cables were installed in Sweden, […]

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North Sea Supergrid Declaration

The declaration: 1. The Ministers of the North Seas Countries: Belgium, Denmark, France, Germany, Ireland, Luxembourg, the Netherlands, Sweden and the United Kingdom Considering, 2. The crucial role which offshore wind energy is bound to play in order for Europe to meet the EU’s 20-20-20 targets. The major part of offshore wind energy development in […]

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Fury at plan to power EU homes from Congo dam – Grand Inga – World Bank supports controversial $80bn project

Plans to link Europe to what would be the world’s biggest hydroelectric dam project in the volatile Democratic Republic of Congo have sparked fierce controversy.

The Grand Inga dam, which has received initial support from the World Bqank would cost $80bn (£48bn). At 40,000MW, it has more than twice the generation capacity of the giant Three Gorges dam in China and would be equivalent to the entire generation capacity of South Africa.

Grand Inga will involve transmission cables linking South Africa and countries in west Africa including Nigeria. A cable would also run through the Sahara to Egypt.

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Vision 2020 and beyond – Dr. Gregor Czisch Ex Kassell University discussed the integration of African Power production internally and with Europe to fully exploit the vast hydro power available at the Inga Dam site

” The Grand Inga dam can provide 2/3 of African power needs and some of Europe’s”

While integration – meaning electrical inter – connections of neighbours – on the

one hand may enable cheap electricity, on the other, it can cause dependence.

Therefore, to avoid a single source dependency, it might be seen as a better

solution, to use less favourable resources inside a given country, and accept higher

costs and other disadvantages. Another way out of this dilemma is diversification of

interconnections. Therefore regional integration may be more attractive when the

number of participating countries rises.

In some cases, regional integration is the only reasonable way of using known

resources which are too big for a national approach.

An extreme example is the hydropower potential near Inga, by the Congo River, in

the Democratic Republic of Congo. The African Power Pools have been formed in

order to erect large scale regional integration projects – leading in a structure one

may call an African Supergrid – to be able to handle the tremendous amount of

electricity which could be produced here at very low prices, and which would be

enough to deliver two thirds of the current African consumption. But the huge

capacity makes it difficult to bring the different objectives together.

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What area of wind turbines would be needed in reasonable sites in the UK to in one year generate all UKs power demand?

Data

A 5 MW turbine rotor diameter is 126m ( from the Repower website http://www.repower.de/index.php?id=12&L=1 )

According to Martin Alder, a wind farm owner and developer:

Across wind turbine spacing = 3 x dia (Assume tower to tower)

Down wind turbine spacing = 5 x dia

According to Colin Palmer, of Wind Prospect, a leading wind farm developer, load factors of 30 – 35% onshore, and 40% offshore are readilly achievalbe.

So assume 33%.

Calculation

Take a 70 mile by 70 mile square. This equals 112 km by 112 km

So downwind, turbine spacing (tower to tower) will be 126 x 3 = 378m. Thus in 70 miles / 112 km we can accommodate (112 x 1000 / 378 ) +1 = 297.3 towers (allowing half blade length to protrude out of area at edges).

Similarly, cross wind, we need 5 x 126 = 630 m. Thus in 70 miles / 112 km we can accommodate (112 x 1000 /630) +1 = 178.8 towers (again allowing half blade length to protrude out of area at edges).

Thus a 70 mile by 70 mile square can accommodate 297.3 x 178.8 = 53,157 turbines..

At 5 MW each, these will generate at peak 265.7 GW.

Assuming reasonable sites and a 1/3 , 33% load factor, this will generate on average 79.73 GW.

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