REVOLT opposing unnecessary, excessive and intrusive powerline development

opposing unnecessary, excessive
and intrusive powerline development

REVOLT Newsletter 364

Revolt news 27/02/2013 Print (pdf) Version

1. The Parliamentary Public Accounts Committee has expressed concerns about the power connections from offshore wind farms. The finances favour the supplier and not the consumer, and could result in payments of £17bn to transmission companies over the next two decades. Ofgem is consulting on possible changes to the system.

2. RWE has announced plans for connecting the offshore Triton Knoll wind farm to the National Grid in Lincolnshire. Undersea and underground cables will be AC according to the RWE website. RWE confirmed this by telephone: one large offshore bundle of 220 or 132kV AC XLPE cables will come ashore at Anderby Creek, a few miles north of Skegness, where they will be connected to smaller onshore cables in up to 8 trenches, each with three XLPE cables in the 3-phase system. The total capacity will be up to 1.2GW. As a fully undergrounded AC system over a distance of some 100km, this project breaks new ground for UK offshore connections.

3. There will be an intermediate compound in the East Lindsey area near Skegness for reactive compensation equipment roughly half way along the 100 km or so of cables. A new RWE substation will be needed to transform voltage up to 400kV within 5 km of the existing NG substation at Bicker Fen near Boston. There are 3 alternative zones for the intermediate compound near Skegness and 4 alternative sites for the substation near Bicker Fen. Consultation starts on 19 February and ends on 5 April. Outline details are on the RWE web page here. Previous plans for new substations and overhead grid lines at Mumby were abandoned after protests (revolt news349 etc).

4. Andrew Hope alerts us to a new project called Greenwire plans to develop wind farms in the Irish Midlands and to transmit the power to Wales by subsea HVDC interconnectors. National Grid is reported as having agreed connections for 1 GW to Pentir near Caernarvon in 2017 and 2GW to Pembroke in 2018. Some aspects of the greenwire plans are not yet clear from the website but it seems both Greenwire subsea cables from Ireland would have 2.5GW capacity. This is big business, compared with the existing Eirgrid EWIC 500MW (half a GW) cable from Ireland to Deesside.

5. National Grid has already made a ‘derogation’ in favour of the Greenwire link to Pentir, since the Greenwire connection could cause “unacceptable overloading of the Pentir – Trawsfynydd 400kV circuit”. The interim remedy is to constrain generation in North Wales. The NG statement says “Greenwire Ltd have signed a connection agreement to connect a 1000MW onshore wind farm located on the Irish Mainland, connecting into Pentir 400kV substation via 2.5GW capacity VSC based HVDC link, connecting in December 2018.”

6. Andrew Hope, who has been looking into Greenwire, says it may be intended to integrate the Greenwire Pentir connection into Mitsui  Corps' Dinorwig Hydro Storage installation, thereby providing (some) storage for variable excess wind power from Ireland. Enquires about UK overland buried hvdc cable routes from Cardigan Bay to Pentir in north Wales and from Cardigan Bay to Pembroke Dock in south west Wales  can be addressed to National Grid via the North Wales Connection Project Helpline at  0800 990 3567. In any event, the GW are piling up in West Wales, potentially en route across Britain for mainland Europe, with much grid reinforcement across Wales and the English Midlands and Eastern Counties.

7. On the 3rd of December 2012, Ministers of Energy of the North Seas Countries’ Offshore Grid Initiative (NSCOGI) and the European Commissioner for Energy presented the results and recommendations of their first two years of cooperation. The Benelux Secretariat as an active player in this initiative is happy to present to you the final report and reports of the NSCOGI working groups. The pdf report is at

8. Figure 5-1 on page 35 of 142 in the NSCOGI report gives a map showing many offshore projects around Great Britain and potential interconnectors and related onshore transmission, but not the Greenwire proposals (item 4 above) nor the east coast interconnector from Scotland, so it needs to be taken with NG’s new ETYS 2012 document (news362).

9. It’s not mainly power frequency, but wifi especially in schools is of increasing concern as evidence mounts and the children can’t avoid the exposure. There can be power-frequency-like aspects to the exposure arising from the pulsing used, and ELF and RF frequencies may combine. Both ELF and RF have been found, separately, by the WHO agency IARC to be class 2B “possible human carcinogens”. Powerwatch give a comprehensive summary with links to reference lists at

Statements made by the editor or by other parties and quoted for information do not necessarily represent the views of Revolt. Criticism of government and industry, and grievances from members of the public, are in the nature of Revolt's work, though we try to give credit where it is due. Revolt is strictly non-party-political and regrets any offence which may be inadvertently caused.




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