New module lowers the cost of offshore wind power

New module lowers the cost of offshore wind power

A new AC power connection module for near-shore wind turbines is expected to cut the cost of accessing the grid for such installations by as much as 40 percent. This solution from Siemens thus also reduces the cost of energy from offshore wind farms. In contrast to conventional AC transformer platforms, the new module can be mounted directly on the foundation of an existing wind turbine thanks to its small and lightweight dimensions, thereby minimizing materials, time expenditures and risk. A biodegradable insulating fluid also makes this decentralized solution extremely environmentally friendly. Siemens recently presented it at the EWEA offshore conference in Copenhagen.

Transformer substations are a core part of wind farms. They are critical for transmitting the electricity generated from to the mainland at higher voltages via subsea cables, which results in lower energy losses. Previous solutions were always built on an additional platform structure and due to their size & enormous weight (1,800 to 4,000 metric tons), added tens of millions Euros, and in some cases hundreds of millions Euros, to project costs.

Cost reduction

The new offshore transformer module (OTM) can be installed with various manufacturers' turbines, either on a dedicated foundation or, to maximize savings, on an existing turbine foundation with both the wind turbine and OTM attached. This is possible thanks to the module's light weight and small dimensions of approximately 30 by 15 meters. A large portion of grid access costs for near-off-shore wind facilities goes to building, transporting, assembling, operating and maintaining the platform. The new solution from the Siemens Energy Management Division will thus help reduce these costs by as much as 40 percent.

The new substation, which dispenses with some auxiliary systems, has been reduced to its essential electrical components. This has made it possible to reduce its total weight to around 630 metric tons for a module with an output of 250 megawatts. In order to reach the transmission capacity required in very large wind farms, multiple modules can be connected to each other. Other costs were reduced in the areas of transport and installation, since a special heavy-load crane vessel is no longer necessary. In addition, the time it takes to assemble an OTM has been shortened by 20 percent, since conventional and more readily available installation ships, known as Service Operation Vessels, can now be used. Maintenance has also been reduced, since fans and diesel generators are no longer required.

A biodegradable transformer insulation medium

New module lowers the cost of offshore wind power

Instead of mineral oil, the new connection solution uses a non-toxic, ester-based insulating fluid – a biodegradable and low-flammability transformer insulation medium. This is an important requirement for use in the open ocean and for maintaining environmental standards.  

Siemens is conducting negotiations regarding the use of its new technology in several offshore projects. The new offshore transformer module is a crucial lever for reducing the cost of electricity generated from offshore energy to ten euro cents per kilowatt hour by 2020, a goal Siemens has announced. Thanks to the knowledge gained from more than ten AC power projects, conventional platform systems are also being optimized. Siemens offers a high degree of flexibility and an extensive selection of systems for the cost-efficient expansion of renewable energy.


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Citation: New module lowers the cost of offshore wind power (2015, August 26) retrieved 23 August 2019 from https://phys.org/news/2015-08-module-lowers-offshore-power.html
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Aug 26, 2015
This means even more coal and nuke plants will be available for Eikka, and Willie and otto and denglish. They WILL buy them, .. . won't they?

Can we close them fast enough now?

Aug 26, 2015
close them
destruction of natural seascapes, large offshore areas, aside millions seabirds slaughtered by wind blades. It is so cheap so ecologically hypocritical.

Aug 26, 2015
Yeah, Willie, all life thrives on coal fumes and their toxins.

Aug 27, 2015
Can we close them fast enough now?


You really should read the articles you're commenting on instead of just popping up to shout one-liners.

The new offshore transformer module is a crucial lever for reducing the cost of electricity generated from offshore wind energy to ten euro cents per kilowatt hour by 2020, a goal Siemens has announced.


It's still incredibly expensive. Even if they reach the goal, it's still $11 cents a kWh which is the average retail rate in the US. That's 2-3 times more expensive than conventional power on the grid.

That's why the industries and the people who really need the energy will not switch over from fossil fuels unless you force them figuratively on gunpoint, and by manufacturing an energy shortage a'la Enron - which is what the governments in Europe and in the US are doing with their subsidize and dump policies.

It's blatant corruption, but since it's renewable energy it is considered "good corruption".

Aug 27, 2015
wind energy to ten euro cents per kilowatt hour by 2020
but gskam told us it would cost less than 2¢/kwh, almost for free. Has he lied to us?

Aug 27, 2015
Gosh, no, Willie! I reported actual contract prices!

Are you afraid? Just hold on, and we will save you.

With cheap clean energy.

Aug 27, 2015
With cheap clean energy.
backed by fossil fuels to compensate intermittency?
"the erratic nature of wind has to be compensated "real-time" by fossil-fuel power stations operating in back-up mode, consuming more fuel than they would otherwise." - August 11, 2015
Wind "better than nuclear"?
"Germany, for instance, has tried to replace nuclear by wind and solar, and failed. They had to build additional coal-fired power stations to keep the lights on in periods without wind or sunshine."
"As a result, Germany's use of fossil fuels has increased."
"Intermittent energy causes more fossil fuels to be burnt"
http://canadafree...le/74457

Aug 27, 2015
Gosh, no, Willie! I reported actual contract prices!


Contract prices are after subsidies. You can make a utility contract for $0/kWh for all that matters.

In Europe, they're occasionally selling wind power at a negative price because they have to dump it on the grid in order to collect the government subsidy. The wind energy producer is paying the utilities to take the electricity, so that the government would pay them the feed-in-tariff that is collected from retail customers as an extra tax on electricity.

Soon enough you'll have the same in California.


Aug 27, 2015
"Soon enough you'll have the same in California."
----------------------------------

Not all your wishes will come true.

Aug 30, 2015
As the birds, insects and bats die wind power will never be acknowledged as the cause. Phony research will always blame the catastrophe on warming or fossil emissions. The whole DDT hoax pretty much proves how unscrupulous the green movement is.

Aug 30, 2015
Fukushima now has wind turbines offshore.

They learned their lessons.

Aug 30, 2015
Fukushima now has wind turbines offshore.
Luckless seabirds, aside natural seascapes ruined by ugly/noisy wind blades.
They learned their lessons.
They learned how to be ecologically hypocritical.


Aug 30, 2015
They learned their lessons.
They learned how to be ecologically hypocritical.
They learned how to be part of the "greenie lie machine".

Aug 30, 2015
Sea level rise 1.7-1.8 mm/year
http://notrickszo...ersyear/

Gee how could have all of those Peer Reviewed Papers been SOOOO wrong and where is all the melting?

Yet the media wonders why conservatives are so upset with the government.


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