Triton Knoll confirms reduction in onshore cable circuits

  • Move will help reduce overall construction footprint and realise planned cost reductions
  • Minimum circuits but maximum power to be delivered from innogy flagship project.


Triton Knoll News

Triton Knoll has confirmed a reduction in the number of onshore cable circuits it will need to build in order to transport power from the offshore wind farm to the national grid network.

The changes will help to reduce the overall construction footprint of the project and will help realise planned reductions in costs, while still ensuring the delivery of maximum power to UK homes and businesses.

This is the innogy-owned project’s latest achievement, resulting from collaboration with its lead contractors to optimise the design and installation of the onshore electrical system. It follows the removal of the planned Intermediate Electrical Compound in September, which was originally expected to be built near Orby.

innogy’s Triton Knoll Project Director Julian Garnsey, said: “Our  design optimisation, carried out in partnership with UK contractors  J Murphy & Sons and Siemens Transmission & Distribution Ltd, is continuing to help deliver the cost and impact reductions anticipated by the project. We’re very pleased to be able to deliver maximum power from this decreased number of circuits, thereby reducing the project’s local construction footprint.”

The cable network of the onshore electrical system is being constructed in two sections, and connects the offshore network to the onshore national grid distribution network. The number of cable circuits have been reduced as follows:

  • A reduction from six circuits of three cables each to two circuits of three cables each at 220kV in order to transmit the High Voltage AC (HVAC) electricity from the transition joint bays at the landfall near Anderby to the proposed Triton Knoll onshore substation. This section of the onshore cable will be installed by onshore cable contractor J Murphy & Sons (JMS).
  • A reduction from four circuits of three cables each to two circuits of three cables each at 400kVin order to transmit the electricity from the new Triton Knoll onshore substation to the existing National Grid substation at Bicker Fen, Boston. This section of the route is managed by substation contractor Siemens Transmission and Distribution Ltd (STDL).

Triton Knoll is an innogy-owned offshore wind farm, and has a planned installed capacity of 860MW(1), capable of supplying the equivalent of over 800,000 UK households per year with renewable electricity.

The project was awarded a Contract For Difference (2) in September 2017, and expects to trigger a capital expenditure investment of around £2billion into much needed UK energy infrastructure. This will enable the delivery of some of the lowest cost energy generation for UK consumers.

It is now progressing towards a financial investment decision later this summer (2018) with full onshore construction starting shortly after, and offshore construction starting in late 2019. First energy generation could be as early as mid-Q1 2021, with the project expecting to begin commissioning in 2021.

 For more information about Triton Knoll Offshore Wind Farm, please visit:


Media Contact  
Mark Fleming

Triton Knoll Communications Manager


M: 07825 608096



Editors notes

(1) Energy Generation

It is estimated that the average annual generation expected at the site could be equivalent to the approximate domestic needs of an expected minimum of 800,000 average UK households.

Energy predicted to be generated by the proposal is derived using wind speeds monitored in the local area and correlated with long term reference data. The energy capture predicted and hence derived homes equivalent figure may change as further data are gathered.

Equivalent homes supplied is based on an annual electricity consumption per home of 4100 kWh. This figure is supported by recent domestic electricity consumption data available from The Digest of UK Energy Statistics and household figures from the UK National Statistics Authority.”

(2) CFD award and consents

Triton Knoll was awarded a Contract for Difference on Monday 11 September 2017.

In July 2013, the Secretary of State granted consent for the offshore array element of the project (turbines, offshore substations, inter array cables etc). In September 2016, the Secretary of State also granted a Development Consent Order (DCO) for the Electrical System (ES) which connects the power generated from the offshore array into the national grid onshore. The ES consent includes the offshore export cable, the onshore underground export cable, an intermediate electrical compound at Orby, and a new substation at Bicker Fen, ultimately ensuring the delivery of energy potentially into an anticipated 800,000 UK homes once the wind farm is fully operational.



About innogy SE

innogy SE is Germany’s leading energy company, with revenue of around €43 billion (2017), more than 42,000 employees and activities in 16 countries across Europe. With its three business segments Grid & Infrastructure, Retail and Renewables, innogy addresses the requirements of a modern, decarbonised, decentralised and digital energy world. Its activities focus on its
more than 22 million customers, and on offering them innovative and sustainable products and services which enable them to use energy more efficiently and improve their quality of life. The key markets are Germany, the United Kingdom, the Netherlands and Belgium, as well as several countries in Central Eastern and South Eastern Europe, especially the Czech Republic, Hungary and Poland. In renewable power generation, the company is also active in other regions, e.g. Spain, Italy and the USA, with a total capacity of 3.9 gigawatts. As a leader of innovation in future-oriented fields like eMobility, we are represented in the international hot-spots of the technology industry such as Silicon Valley, Tel Aviv, London and Berlin. We combine the extensive expertise of our energy technicians and engineers with digital technology partners, from start-ups to major corporates. With planned capital investments of around €6.5- €7.0 billion (2017-2019), we are building the power market of the future and driving forward the transformation of the energy market.

With an installed capacity of more than 900 megawatts in offshore wind and with over 1900 megawatts in onshore wind, innogy is one of the major operators in Europe. We plan, develop, finance, build, own and operate plants to generate power and extract energy from renewable sources. Our aim is to take the expansion of renewables in Europe further in the short term, both on our own and collaboratively with partners. We believe that working together in this way is the key to making the energy transition a success. Currently, we are particularly well represented in our home market, Germany, followed by the United Kingdom, Spain, the Netherlands and Poland. At the moment we are focusing on continuing to expand our activities in onshore and offshore wind power; however, we are also looking at entering new markets and technologies, such as large-scale photovoltaic plants.

Post Author: Mark Fleming