Eno mag 3 2013 (english)

| No. 3 / 2013

The magazine for success with wind Intelligently adjusted - by the self-developed park control eno gridmaster 速 With this eno wind turbines contribute towards grid stability and support in the event of failure / page 4

www.eno-energy.com

Turbine

2

2.2 MW enovation for efficiency Solid plant design for higher yields The optimal combination of compactness, solid engineering and increased profitability - through the ideal design of the plant and the control system increases the eno 100 the annual energy yield at low wind sites by up to 14 %.

www.eno-energy.com

The magazine for success with wind

Content

Editorial

Dear Reader,

04

Grid stability and support Certification for the whole 2-MW platform

08 Example Kauxdorf Setting sail on the windfarm

10 Researd and Development How to storage renawable energy

14

Successful in Hannover eno 100 at Windpower Fair

12

eno around europe Targetting the windy island

14

On the run with energy eno at the companies’ Rostock Run

12

New turbine for sweden Logistical challenge for the eno 100

14

Career Trainees for the company

13

MVV-Energie-Guest article New approaches in marketing wind power

15

New branch in Berlin eno energy opens city office

15

Construction updates for the 2-MW platform

13

Technical congress Grouping eno wind turbines boots efficiency

There has long been broad consensus in Germany that our entire energy supply system needs to be transformed. Renewable energies should be progressively expanded to become the central pillar of our energy supply. Often, the Energiewende – the turnround in German energy policy – is equated with the expansion of renewables.

The development of onshore windpower is especially gratifying. Last year saw a sharp upturn in this relatively low-cost technology. That requires more than just stable networks. As proven by the EZE certificate, eno wind power plants are contributing to the stability of the grid and to its support in the event of disruption.

But our concern is also with the future. If the Energiewende is to succeed, ways and means must be found to store energy from wind or sun when supply exceeds demand – with that energy accessible to be drawn on when demand exceeds supply. There is an abundance of good ideas, but problems can arise in trying to implement them. You will find a brief survey of these issues in this magazine.

But the Energiewende is in full swing beyond Germany, too. Our Business Development team has taken a good look around Europe and identified some attractive markets. Developments in Sweden show further successes where we are already installing the next eno wind turbine.

We hope you enjoy reading this and wish you every success in implementing future projects.

Stefan Bockholt, authorized representative / head of R&D

ImprInt Author eno energy GmbH | Am Strande 2 e | 18055 Rostock | Germany | phone: +49 (0)381 . 20 37 92-0 | fax: +49 (0)381 . 20 37 92-101 | info@eno-energy.com | www.eno-energy.com | Editing and Layout Alexandra Meyer | Layout WERK3.de | printing Stadtdruckerei Weidner | paper Satimat Green 60 % Recycling, 40 % FSC | Copyright All contributions published in e.n.o. magazine (copy, photos, graphics, tables, logos) are protected by copyright. Reprinting, inclusion in databases, use in online services or Internet pages and reproduction are only permitted with the prior written permission by e.n.o. energy Gmbh. | Despite careful inspection of the publication by the editorial team, e.n.o. can accept no liability for its accuracy. | published sporadically | photo Andreas F./fotolia.com (Title ) . 3drenderings, by-studio, berlinphotos030/fotolia.com . eno energy

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DIgSILENT

Grid stability and support

2,000 0,000 90,009 1,000

Lausitz WEA2

4

Betreiber Externes Netz -

MITNETZ

mbH MITNETZ Strom sse Kau H & Co. Kabeltra e.n.o. energy Gmb Co. KG dort 28 GmbH & e.n.o. energy Stan Co. KG & H Gmb dort 29 e.n.o. energy Stan Co. KG dort 18 GmbH & e.n.o. energy stan

-11,76 MW 0,48 Mvar -1,00

UW Falkenberg 20,000 1,000 0,000 0,000

11,767 -0,492 55,686 0,999

kV NAP KÜS - 20 20,017 1,001 0,088 0,083

usitz - 12.150 kW

Kauxdorf 3 & La

WP Kauxdorf 2,

-11,767 0,492 63,354 -0,999

Tr. Kauxd2-8a

0

1,025 0,000 79,841 1,000

0,616 1,027 -145,706 2,705

1,025 0,000 79,841 1,000

EB8

0

1,025 0,000 79,764 1,000

0

1,025 0,000 79,764 1,000

0,617 1,028 -145,655 2,803

NS-SS WEA9

2,050 0,000 82,000 1,000

0

1,025 0,000 79,651 1,000

20,456 1,023 1,801 2,281

ngs2 parallele 3-Wicklu pro e.n.o.82: Transformatoren

0

1,025

0,000 79,651 1,000

formator: Daten je 3 W-Trans 20/0,6/0,6 kV (2 x 625 kVA) MVA 1,25 = Sn uk = 6,0 % Po = 1,4 kW Pk = 14,0 kW Dy5y5

-1,980 0,150 86,514 -0,997

NS-SS WEA3

2,050 0,000 82,000 1,000

EB10

Kauxd2-10

EB9

Netz

-1,980 0,150 86,430 -0,997

0

2,000 0,000 86,430 1,000

NS-SS WEA1 1,028 -143,830 2,845

2,000 0,000 86,957 1,000

EB1

Kauxd3-3

Kauxd3-1

Kauxd2-9

4.000 kW WP Kauxdorf 3 r V90 GridStreame 2 WEA vom Typ 6.150 kW WP Kauxdorf 2 e.n.o.82 3 WEA vom Typ

ung [MW] tung [Mvar] gsfaktor [-]

20,476 1,024 1,839 2,381

0,668

2,000 0,000 86,957 1,000

EB3

Kauxd2-8

2,000 0,000 86,514 1,000

1,980 -0,150 17,495 0,997

MS -SS WE A1

WEA-Trafo V90: 20/0,65 kV Sn = 2,25 MVA Pk = 20,0 kW P0 = 5,0 kW uk = 9,0 %

0

0,668 1,027 -143,860 2,745

0,618 1,029 -145,607 2,949

-1,978 0,116 17,495 -0,998

Tr. Kauxd3-1

MS -SS WE A3

20,435 1,022 1,760 2,176

-1,015 0,049 79,651 -0,999

-2,029 0,098 17,938 -0,999 -1,015 0,049 79,651 -0,999

NS-SS WEA10

2,050 0,000 82,000 1,000

5,983 -0,349 52,911 0,998

3,958 -0,267 34,985 0,998

Tr. Kauxd3-3

-1,015 0,049 79,764 -0,999

0

20,406 1,020 1,705 2,030

-3,953 0,251 34,985 -0,998

MS -SS WE A9

-1,015 0,049 79,764 -0,999

-1,015 0,049 79,841 -0,999

-1,015 0,049 79,841 -0,999

NS-SS WEA8

MS-SS WEA10 -2,029 0,098 17,963 -0,999

-2,029 0,098 17,980 -0,999

Tr. Kauxd2-8b

20,386 1,019 1,649 1,931

-0,435 54,121 0,999

Tr. Kauxd2-9b

MS -SS WE A8

-5,974 0,337 52,911 -0,998

8,003

-7,995 0,426 54,121 -0,999

11,999 -0,584 63,354 0,999

Tr. Kauxd2-10b

-1,974 0,060 17,526 -1,000

Tr. Kauxd2-10a

kV it

d3-1 °) Ltg. Kauxd3-3 - Kaux 1,048 km 12/20kV it NA2XS2Y 1x150RM

d3-3 °) Ltg. Kauxd2-9 - Kaux 0,547 km 12/20kV it NA2XS2Y 1x150RM

Kauxd2-9 Ltg. Kauxd2-10 0,502 km 12/20kV it NA2XS2Y 1x150RM

d2-10 Ltg. Kauxd2-8 - Kaux 0,425 km 12/20kV it NA2XS2Y 1x240RM

Tr. Kauxd2-9a

d2-8 Ltg. KÜS - Kaux 8,600 km 12/20kV it NA2XS2Y 1x400RM

(ZN)B2Y 12 E9/125

im Windpark: Y 12 E9/125 LWL: DQ(ZN)B2 20x2x0,8mm FMK: A-2Y(L)2Y

äß Messprotokoll Kabellängen gem äß AutoCAD °) Kabellängen gem

.6

PowerFactory 14.1

d Übersichtsschaltbil III, Lausitz 20 kV II, rf xdo Kau WP (2 MW) 5 MW) und 3 x V90 3 x e.n.o.82 (2.0 Sachs kien / Dipl.-Ing. G. Dipl.-Ing. R. Les

Projekt: Grafik: Netz 12 Datum: 28.11.20 Anhang:

Windpower needs grid feed-in options Eno wind turbines contribute to grid stability and support Simulation and extensive measurements of the grid performance of the model series of the eno 92 in the field have proven that the machine complies with all requirements of theSDLWindV (System Service Ordiance for wind power plants).

A2 The magazine for success with wind

EZE certification is subdivided into three main tasks: / LVrt measurement / measurement of electrical properties / Construction of a detailed simulation model

LVRT (low voltage ride through) measurement: First comes the preparation. One begins with the suggestion/ selection of location for LVRT tests, in this case of prototypes.

A suitable, robust grid connection point and a good wind site are also needed.

q Wind farm Kauxdorf – eno turbines are ready to support the grid

A

model-specific plant certificate is required to demonstrate that a decentralised generation unit (EZE) will operate in conformity with the requirements of the public electricity grid.

What might sound like a neat and simple job is supposed to ensure that the grid operates smoothly and requires a mass of work from the wind power unit manufacturer before certification is granted.

The aim of EZE certification is to prove that electrical performance of a wind turbine – the generating unit – is compatible with the »SDLWindV« ordinance and also conforms to the guidelines in

normal operation and in the event of a grid failure. eno energy systems GmbH has obtained certification for the whole 2-MW platform.

This currently comprises the wind turbines eno 82, eno 92 and eno100. The designation refers to the rotor diameter in metres. The platform has common electrical features which include an electrically excited synchronous generator with rectifier in the nacelle, DC link with chopper resistor and the modular full power converter in the tower base.

Before LVRT testing of the eno 82 can start at the Groß Trebbow site, employees of eno energy systems GmbH investigate network disturbances (e.g. voltage changes) by simulating voltage drops in the medium-voltage grid. Also in advance, the required coil configuration (impedance wiring) in the LVRT-Container is calculated. In parallel with that, negotiations and consultations take place with the grid operator, in particular with Netzgesellschaft Schwerin mbH. Voltage changes of up to 5 % in the medium voltage grid are authorised for brief periods.

In addition, the duration and number of LVRT tests, the installation of the disturbance recorder and issues of liability need to be clarified and a contract agreed.

Consultations are also held with the operator of the wind turbine concerning the LVRT tests and the operator’s prior agreement is obtained.

Rainer Leskien, responsible at eno energy systems for the optimisation of grid connection and the creation of simulation models, explains the next part of the process »Then we have to reserve a measuring container from GL Garrad Hassan Deutschland GmbH with special coils enabling us to produce synthetically defined voltage drops at the wind turbine of 5 %, 25 %, 50 % and 75 % of the rated voltage and a sufficiently large shortcicuit capacity.« An on-site container

5

1,000 6

Grid stability and support

EB2 Lausitz WEA2 office needs to be arranged; additionally eno energy favours an environmentally friendly auxiliary power transformer rather than the usual diesel generator to provide an uninterruptible power supply. A buried cable installer is commissioned to con-

Next step: the LVRT measurement: Two people from GL Garrad Hassan Deutschland GmbH and one representative fro, eno energy systems GmbH have

»Many organizational things are needed for such a test.« nect the auxiliary power transformer and measurement container to the medium voltage grid. A test like this requires quite a few organisational preparation. This is how electrical enigineer Leskien summarises the process: »The crane hardstanding is flattened, the test equipment is prepared and the site is securely fenced off. The safety set-up parameters need to be adapted, after consultations with the grid operator’s safety experts, to the overriding power transformer station, in this case Schwerin Lankow, to the client substation and to the wind turbine.« Further safety measures include taking out third party liaibility insurance and the hiring of a security firm to guard the test equipment at night. And, quite naturally, preparatory consultations about the test are held with the accredited measuring institute.

The requisite input and output channels for the test and, thus, for the transmission of signals (i.a. wind speed, pitch angle, torque) are clearly defined in advance. A distinctive feature of this measurement is that the effort for these tests is significantly higher than is required for the actual certification. Measurements are made for instantaneous current and voltage for all systems – in this case for the threewinding transformer (WTG transformer) with 4 low-voltage and 1 medium-voltage three-phase system. But only the medium-voltage side is certified.

been on site at the wind energy park for a period of four months. The first steps were to wire up of the measuring equipment, to check and verify the plausibility of the measuring signals and the socalled »no-load-tests« with the »calculated« coils. Next comes the fine-tuning of the WTG transformer: e.g. the site-specific parametrisation of the ramp for the return of active power.

Hundreds of LVRT tests follow. An important element is that the results must be

Electrical behaviour is measured during both symmetrical and asymmetrical (bipolar failure) voltage drops. Most attention is paid to the values most relevant to the guidelines: active and reactive power as well as reactive current. All LVRT tests were successfully carried out. All forecasted values proved accurate and the real grid impacts were actually less than calculated because the calculation was based on minimal short-circuit capacities – a worst case scenario.

Measurement of electrical properties: Measurements at the two wind turbines under test, the eno 82 in Groß Trebbow and eno 92 in Neutz, were concerned with their electrical properties: harmonics, interharmonics, flicker, switch factors and the active power-reactive power capability (PQ capability) of the wind turbine.

»The real grid impacts were actually less than calculated.« reproducible, which means at least two trials using the same or similar conditions (the depth and duration of the voltage drops, active and re-active power settings). Each test is followed by an on site preliminary evaluation in the container office.

To conclude the measurements successfully, all wind speed intervals need to be measured, and during this period the wind needs to be sufficiently strong. That is why the period of measurement can be very long – up to half a year.

q For the certification much work has to be done on the site

The magazine for success with wind

7

q eno wind turbines contribute to grid stability and support

Creation of a detailed simulation model: Eno energy built its own simulation model to undertake preliminary calculations for model validation in order to reduce the period needed for actual certification. The eno 82 simulation model is a detailed root mean square value model (RMS model) with more than 50 parameters. Through adaptation of the model parameters and structure-optimisation of the starting model, differences between the measured and simulted results were minimised through iteration in order to fulfil the requirements for precision of Technical Guideline 4 of the Fördergesellschaft Windenergie e.V (the German society to promote wind energy).

Rainer Leskien explains the problems in that process: »Inrush currents of the wind turbine transformers after a fault finding on the medium voltage side are very different. Inrush currents are magnetisation currents – an inductive supply of reactive current which acts to lower voltage. In general, inrush currents are not reflected in the RMS simulation models of the soft-

ware for network analysis, which means there are gaps in that area between reality and simulation, but these are accepted in the current certification. Overall, the precise behaviour of the wind turbine could be proved with the help of low voltage measurements. That is how the differences between reality and simulation can be assigned to inrush currents.« In determining the plausibility of the simulation model, among other tests, voltage drops are checked over in 10 % steps with varying pre-fault reactive and active currents as well as for multiple faults.

Before the required documents are handed over the certifier, the results of the eno simulation model show that the tolerances demanded by the certification process have been complied with.

When the three main tasks of the EZE certification have been completed, certification is granted by WIND-certification GmbH in Bargeshagen based on the manufacturer’s declarations concerning the 2 MW eno wind turbines. The EZE certificate for the eno 82 wind turbine

was issued in spring 2013, those for the eno 92 and eno 100 in summer 2013.

Finally, to summarise: eno wind turbines are produced in Germany, professionally and in line with market needs, they have a large PQ capability and cause only slight network disturbances.

The speedy grant of the EZE certificates for the eno 2 MW platform (after about one year at prototype stage – out of a permissible two years) is confirmation that eno wind turbines contribute towards grid stability and support in the event of failure and comply with SDLWindV requirements and guidelines. At the same time, the EZE certificates are the basis for the issue of generation plant certificate for every wind farm in Germany, the guarantee of long-term grid connection and the pre-condition for entitlement to renumeration according to the German Renewable Energy Act – the EEG.

NS-SS WEA2 0,667 1,027

8

Grid stability and support

0,6 1,0 -143 2,6

NS-S q From the wind farm into the grid – intelligently adjusted by the eno gridmaster

Setting sail on the windfarm Intelligent control and certification service at the Kauxdorf windfarm

D

riving through the Elbe-Elster district of rural Brandenburg, just 80 miles south of Berlin, you find a series of windfarms on either side of the main road. Lying between the small towns or villages of Kauxdorf, Lausitz and Zinsdorf, these individual plants have grown together to form a single wind farm cluster.

For the Kauxdorf 2 and 3 and Lausitz wind farms, eno energy undertook not only the certification of the individual units but also the planning and installation of the windfarm control system using the innovative eno gridmaster ®. This means that the three farms – with a combined output of 12.2 MW – function as a single unit for control purposes even though they are made up of different wind energy turbine systems: each have three Vesta V90 and an eno 82.

How come the control of these »mixed farms« can work without any problem?

The answer lies in the so far unrivalled eno gridmaster ® concept. This is a control and communictions system located at the network feed-in point to provide overriding control of power generation units. Even during lulls in the wind, it can meet, intelligently and independent of performance, the legal requirements and the demands of grid operators for both eno and mixed windfarms. »Additional benefits come from the possibility of installing separate IP ranges and fibre optic cables for the transmission of processing data for different types of generator. This makes it possible to maintain standards specific to each plant

manufacturer.This guarantees greater safety in the windfarm and makes it easier to locate faults,« says Gudrun Sachs of eno energy systems GmbH, where she is responsible for grid connections and EZA certification.

Additionally, the logging functions integrated into the enogridmaster ® enable storage of all relevant data of the turbine control unit while making them potentially accessible to an external, remote SCADA turbine monitoring and control system. Moreover, the eno gridmaster ® meets the requirements which allow for the direct marketing of the power produced and for the maintenance of enhanced management premiums in respect of the remote control of wind farms and mixed power generation units.

The magazine for success with wind

Since these power stations requirements need to be taken into account and demonstrated during the planning stage of an an energy generation plant, eno energy undertook an internal test and simulation of a wind farm grid as part of the process.

The two-step certification process comprises, amongst other things, the compilation of the extensive documentation required for certification. Documents include, for example, inspection protocols, plant and network operator check sheets, circuit diagrams for plant components, simulation models for EZE (individual generating units) certification etc. In the first stage of the certification procedure, based on a majority of these documents, the certifier undertook a successful simulation of the energy park grid and a replication of the required conditions and features in accordance with the guildelines. In the course of stage 2 – the declaration of conformity – the certifier undertook a tour of inspection of the plant to check the installations laid down

by SDLWindV and under the requirements for grid operators. Also included in this stage were a check of the remaining documentation, for example of the commissioning certificate and protection test

The end of June saw completion on schedule of the whole certification process for the turbines which had started operation between March and July, 2012.

The EZA certificate for the whole plant, including the declaration of conformity for the testing of grid compatibility was delivered to the grid operator. Gudrun Sachs notes: »For the operator of a wind power plant, successful completion of the certification process is an important step for fulfilling the remuneration requirements of the German Law on Renewable Sources of Energy – the EEG.

Advantages of the eno gridmaster ® at a glance: / Superior control unit for the entire wind farm / Guarantee of the greatest efficiency at the grid connection point / Serves as an advanced interface to the network operators and the SCADA databases / Applicable for external machines, regardless of manufacturer and type of production unit

We can organise this based on our many years of experience in dealing with EZA certification and the requirements of the SDLWindV regulation and the close cooperation we maintain with clients, other manufacturers and grid operators.« The remuneration requirements of the EEG are finally fulfilled once the EZA certificate and declaration of conformity have been checked by the grid operator.

00 00 09 00

The goal of every wind farm certification is to prove compliance and conformity with the requirements of the SDLWindV System Service Ordinance for wind power plants and relevant guidelines. In the past, it sufficed to ensure that power generation turbines caused the lowest possible electrical impact on the grid.

These days, however, wind farms are increasingly required to fulfil requirements that previously applied only to large power stations.

protocols, and tests of the remote control or telecontrol technology in cooperation with the respective grid operator.

WEA2

The technical requirements, too, for power generation plants (EZA) in respect of grid stability are constantly rising. So, the investor in this energy park was happy to have eno energy take on responsibility for the certification process (EZA certification and declaration of conformity) for the wind farms. In the course of that process, eno energy forms the interface not merely to the certification authorities but also to other turbine manufacturers.

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q In Kauxdorf not only eno plants supply electricity to the grid

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Research and development

Storing wind power The eno research department seeks new approaches

Energy storage options For a long-term switch to renewable energy to succeed, there must total assurance of 100 % power supply at all times, even during the usual idle periods. The partial feeding-in of solar energy during periods of calm and more consistent average wind conditions as turbines are spread more widely across the country should improve German power supply but cannot guarantee it. To avoid using conventional power plants as back-up, storage systems will have to be created to plug these »gaps«.

Various studies show there will be demand for such storage systems of up to 30 TWh in the next few decades. A number of technical solutions are currently under discussion: // Pumped storage // Advanced Adiabatic Compressed Air Energy Storage – AA-CAES // Batteries // »Power to gas«, a conversion into chemical energy sources with reconversion.

Both pumped storage and adiabatic compressed air storage offer acceptable levels of efficiency and can be operated economically provided that there are once again large and more frequent fluctuations in the price of electricity.

The potential in Germany, especially for pumped storage, is very limited. But the available potential in Scandanavia could in principle be used with transport via high voltage direct current. Since these capacities are being claimed by other European countries following the expansion of renewable energy, there are limits to Germany using this option.

By contrast, adiabatic compressed air storage systems, though not yet available, are applicable in Germany, too, using salt domes as storage caverns.

Batteries are suited to balancing out the day-night cycle of small photo-voltaic systems. But there are only very limited availabilities of the large and economically-priced batteries that would be needed for the storage of the several megawatt hours of energy produced by wind turbines.

Further options are not curently under active consideration, in part because the technical issues remain to be resolved, or because they have no commercial potential.

Coupling electricity output with other sectors of the energy industry The goals of expanding renewable energy encompass adding wind turbine and solar panel capacities to cover peak load rather than just minimum demand. That results in feed-in limits at certain times, even if the grid expands optimally in line with the growth in generating capacity. To avoid power limitations of generating plants, some other way must be found to use this energy.

The German government aims not only for energy supply to be based 80 % on renewables, but also to achieve a figure of 60 % for renewable energy in the supply to end-users. That means taking in the areas of heat and fuel/mobility, thus yielding a special overlap with the issue of storage.

Power to heat The principle of power to heat can be applied immediately where excess power is converted into heat. Reconversion back into electricity is highly energy inefficient and thus non-economical . But the heat thus generated can reduce demand for fossil energy sources and contribute, thereby, to the goal of reducing CO2 emissions. An integration into existing heat distribution systems could be quickly realised. The low world market price for carbon, currently around 1 ct/kWh, combined with the low prices for carbon certificates, mean the Power to Heat option is currently not commercially viable.

Power-to-Gas A more active interplay between various energy sectors can be achieved through the power to gas model. Renewable energy, such as future surplus quantities of wind and solar power, is converted by electrolysis into hydrogen as an energy source, which is then reconverted in gas turbines with power-heat cogeneration. In addition, it can also be used in vehicles with fuel cells and has application in the chemical industry, for example in ammonia production The hydrogen can also be converted to methane with the addition of cabon dioxide which can be fed into the existing natural gas distribution system as synthetic natural gas.

The magazine for success with wind

wind farm

natural gas pipeline pel

O2 CH4

H2O

elektrolyzer

H2 Sabatier-reactor H2O CO2

q Basic concept of power-to-gas

This natural gas is also usuable in gas-driven vehicles and existing gas-burning power stations. Separated carbon dioxide from biogas plants can here be used as an economical and climateneutral raw material.

Along with its low efficiency as a storage medium, there are also legal and economic negatives: storage media of this type, without direct reconversion, are classed as end-users. That means they have to bear the burden of all taxes and charges of a power consumer (VAT, electricity tax, renewable energy charge and grid fees). This makes it currently impossible to operate such a plant commercially, even if costs can be significantly reduced.

How is eno energy responding?

It has long been clear to eno energy – and to others in the field – that wind and other energy sectors need to be integrated if the move to renewables in Germany – the so-called Energiewende – is to succeed. The development of the eno E-bike was a first step towards linking power generation and mobility. In addition, eno energy’s company car fleet includes several that are electrically driven. Although these vehicles are ill-suited for long-distances and despite current taxes and charges on electricity consumption, they can already be operated economically since the equivalent kWh cost for diesel or gasoline is about twice as high as for electric power.

Furthermore, the eno energy research division is investigating the feasibility and economic viability of further ideas and concepts for energy storage. For example, eno energy is supporting the »HYPOS« concept which aims seriously to investigate and demonstrate the integration of hydrogen into the overall energy system.

Eno energy provides experience and expertise as a partner for energy storage projects.

Dr. Martin Hörenz / Graduation at the Department of Aeronautics and Astronautics at the technical University of Dresden / 2010 doctoral thesis with a focus on energy storage with renewable fuel cell systems / research work as part of collaboration with EADS Astrium / Since 2012 working at eno energy systems GmbH at the department of research and development

www.eno-energy.com

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eno around Europe

Targetting the windy island eno expands activities in the British Isles After opening branches in France in 2008 and in Sweden in 2011, the eno energy group has set its sights on the United Kingdom. The group paved the way to the UK with a presentation by eno energy systems GmbH in May this year at All-Energy 2013, in Aberdeen, Scotland.

The annual Exhibition and Conference is the UK’s largest renewable event. A major role at All-Energy is played by the offshore wind sector and by wave and tidal current power stations. But also onshore wind offers interesting prospects with attractive feedin tariffs for a 20 year period envisaged up to 2021.

Many local project developers concentrate on the most highly remunerated sector for plants smaller than 500 kW. What’s more, they focus on machinery in the IEC 1 class, since large parts of the coastline in the UK are classified as having those wind properties. eno energy, on the other hand, will concentrate on turbines in the 500 to 1,500 kW class.

Over a 20-year time period, real returns are more attractive than those for the smaller class. For this sector, eno has on offer: a new variant of the eno 82 with a 1.5 MW output for wind class ll. In this segment, the new eno turbine will be not only the highest performing but also the quietest turbine on the market.

As part of the future energy mix, as set out in the government’s »UK Renewable Energy Roadmap«, onshore wind power will play a key role as one of the most proven and cost-effective technologies. By 2020, renewable energies, including onshore wind, are due to provide 15 % of total UK energy needs.

Of special importance in the UK is the visual planning landscaping of wind power plants which is regulated under a socalled »Visual Impact« process. Currently, the total height of wind power plants in England and Scotland is generally between 100 and 125 metres. The eno 82 with towers of 59 and 80 metres will have

a total height to turbine rotor tip of 100 or 121 metres and will thus not exceed current heights at maximum output. eno’s first time at All-Energy provided some highly promising contacts and the group’s sales team received very positive feedback on its product portfolio. As a follow-up, eno sales is making firm plans to be in Birmingham in November for RenewableUK 2013 – a further important sector trade fair.

eno around Europe

An eno 100 is under construction in Sweden eno energy systems GmbH expands in foreign markets Located in idyllic woodland in the Southeast of Sweden, the eno 100 windturbine in the tranquil country parish of Lilly Kulleryd in Bräkne-Hoby, will start turning this September. The new windturbine model with its rotor diameter of 100 meters and a hub height of 99 meters is based on the proven eno 92 and adds to the existing 2 MW platform.

Installing the new turbine is a logistical challenge. The forest location leaves little space for the cranes and hardstanding. For eno energy as a newcomer in the Swedish market, it was an appealing task: eno energy’s long experience in project management and a detailed understanding of the conditions to be fulfilled were a wining combination in completing the job successfully.

In addition, the commissioning authority wanted a square base which was specially developed in Sweden for the project. q In Sweden, square foundations are preferred

The magazine for success with wind

Guest article

MVV Energie pursues new approaches in marketing wind power The amendment of the EEG – the German Renewable Energy Act – has in recent years fundamentally altered how wind-generated electricity is marketed. Currently, some 80 % of the energy from wind turbines is marketed direct in the framework of the market bonus scheme rather than at a fixed EEG tariff. One can assume that this is not the end of the road and that the state will undertake further steps to integrate green energy even further into the market.

The production of electricity for companies that cover part of their own energy needs through their own wind or solar output is another way to market wind power outside the framework of EEG tariffs. This electricity produced from one’s own power plants offers consumers substantial price advantages. Neither grid fees nor the EEG levy apply, and for wind power plants of up to 2 MW capacity, the electricity produced is electricity taxexempt.

As an integrated energy enterprise, MVV Energie has a picture of self-generation from both the consumer’s and the producer’s viewpoint. Building on our in-house expertise, we complemented our Energiefonds product with an addition called »SpotLight«. Since 2005, our Energiefonds has enabled clients right across Germany to structure their acquisition of electricity – and later of gas, too. It enabled medium-sized forms for the first time to profit from fluctuations in the market price of energy and/or to reduce their risk exposure.MVV Energie has now complemented this proven product with the new Energiefonds SpotLight option. This is the thinking behind it: in addition to structured purchasing of electricity on the market, which minimises long-term risks while exploiting short-term opportunities, self-generated solar or wind energy from an in-house plant, extends a company’s portfolio. A mix like this ensures a greener

q MVV Energie operates e. g. the wind farm Plauerhagen with eno turbines

corporate profile and markedly lowers energy costs. »Producing to cover one’s own needs can also serve direct marketing under the EEG as a fall-back position, if one’s own consumption drops,« says Dirk Garbe who markets to major MVV Eneergie customers. »This ensures that the electricity produced can be sensibly used, even when the company is closed for vacation or on public holidays, too.« In checking whether use for internal consumption is possible using an existing plant, proximity to a possible energy consumer plays the key role. In the ideal case, a direct technical link can be made between production and consumption, thereby obviating use of the public grid and avoiding associated fees.

This factor can play a role in the project planning of new wind turbines and in decisions on their location. »For a company that consumes a lot of energy, to invest in self-generation can be attractive,« Garbe explains. »But for project planners and investors, where the electricity generated cannot be consumed inhouse, it can make sense to seek out an end-user and to build a plant at that location.« In the framework of its Energiefonds SpotLight, MVV Energie provides a comprehensive support service for implementing a complementary wind turbine. MVV energy is the key business partner to consult for the integration of wind turbines into a customer’s electricity supply.

Author: Dirk Garbe, Key Account Manager Industry and Trade, MVV Energie AG

Paper given at the Windmesse Technik-Symposium in Hamburg

Grouping eno wind turbines boosts efficiency A series of innovations developed internally by eno energy allows wind power operators to boost the density of turbines on a wind farm. That means higher returns from the land available.

Dr. Martin Hörenz, head of research at eno energy, presented this so-called eno up.site along with the new 3.5 MW platform in Hamburg. eno up.site comprises above all a layout design to improve

the tolerance of turbulence and to reduce turbulences caused by wind turbines. It makes use of the optimised geometry profile created for the newly developed eno rotor blades.

The eno up.site is currently a unique process with no competition and economically ever more attractive as the land available for siting wind farms becomes ever scarcer.

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Hanover Fair

A successful appearance at the Windpower Fair eno energy system GmbH presents the eno 100 in Hanover Yet again, the world’s largest industrial fair proved a major attraction in 2013 with more 6,500 exhibitors from 62 countries displaying new products over five days. Windpower represents one of most dynamic market areas in the energy sector.

Once again, the innovatory dynamism of the windpower sector was in evidence in Hanover this year. In particular, plant optimised to operate in areas of moderate wind will be a significant element in in the efficient deployment of windpower. And that is where the new eno 100 comes into its own. Based on the tried and tested 2 MW-platform, its 100.5m rotor sweeps an area of about 7933 m², an increase of 18 % compared with the eno 92. »This will prove itself as a specialised turbine for regions with moderate wind strengths and got a good reception at the industry fair,« according to Sales Director Helmut Lange who pointed to another highlight of the industry fair from the eno energy stable: »We were able to present our electric bicycle at the largest industry fair in the world. We are very proud of that. And for us it is a further step in the energy revolution.« The eno E-bike was a real eye-catcher and in addition drew lots of attention to our stand at the fair.

eno energy enters three teams The Companies‘ Rostock Run With temperatures soaring to over 30 degrees, nobody really felt like moving, let alone running. But on the hottest day so far this year, the fourth annual companies run took place in Rostock – over a course of 7 kilometres. Three teams represented eno energy GmbH. About 60 companies and other bodies entered a total of 115 teams, each made up of four members. The eno energy runners clearly did NOT run out of wind and achieved very creditable results. The eno Runners team came in 19th in the men’s team event.l They were closely followed the Windhunde – the dogs of wind – in 21st place and their colleages, Success with Wind, just two places back in 23rd.

Congratulations go to all who took part.

Education

A whole lot more of eno!

Eno relies on its own apprentices Eno energy has a consistent policy of training up and promoting young people within the company. It sees this as the best way to ensure constant improvement in its wind turbines and long-term customer satisfaction. Expanded production of its own components, but also doubling output of its wind turbines, will mean up to 30 new positions a year in the company. Ap-

prenticeships and further training are an important element in quality assurance. Eno energy currently has a number of attractive vocational training positions in both industrial and commercial sectors. »Even now, it is sometimes difficult to cover our staff needs from within the region,« says eno’s personnel chief Norman Jordan. »This makes our own

high-quality vocational training all the more important so that we don’t always have to rely on getting qualified staff from elsewhere« In addition, the concern currently has 6 female staff on a future leadership scheme (Perspektive Führung) which aims to further women’s skills for promotion in commercial and technical professions.

Career: We take you along on our path of growth and are looking for motivated and interested applicants. jobs@eno-energy.com

The magazine for success with wind

A Fresh Wind in the German Capital

Eno energy moves into its Berlin office Eno energy GmbH has moved into its new Berlin Headquarters. Setting up in the heart of the city – two minutes on a bike from the centre of Germany’s government and three minutes’ ride from the Brandenburg Gate – is a conscious choice by eno energy’s top management.

The location of the company’s new offices – on the corner of Reinhardtstrasse and Luisenstrasse - reflects a decision for the growing company to be prominently represented in Germany’s political centre. It is also ideally sited for building up and managing the company’s networking activities. Nearly all the important national industry associations concerned with renewable energy are in the immediate vicinity: both the German

q eno energy on the rise: the new branch in the heart of Berlin, close to the government district

Renewable Energy Federation, the BEE, and the German Renewable Energies Agency are located in Reinhardtstrasse and the German Wind Energy Association (BWE), the umbrella organisation forthe German windpower industry, is also situated very nearby.

The company’s marketing and public affairs activities, among

others, will be managed in the Berlin office. But the same will also apply for the sales and distribution of eno energy’s new E-Bikes. After all, the Berlin-Brandenburg region is a role model for electro-mobility and Berlin itself is seen as leading the way in future developments in this area.

pany’s capital city office is planned for the start of 2014.

The official launch of the com-

info@eno-energy.com

Adresse: eno energy GmbH marketing reinhardtstraße 43 10117 Berlin fon +49 (0)30 . 400 55 94 14

Construction

Technology Update March and June this year saw successful completion of the certification process for the eno 82 and eno 92 wind turbines.

Likewise, extended platform certification was granted for the eno 100 in July. Here are some further technical updates for the 2 MW platform. For example, the eno 92 can in future be deployed in earthquake zones Class 3. Areas in this category which are most at risk of earthquakes in Germany include parts of the Lower Rhine Basin – either side of the River Rhine in the Colgne-Düsseldorf region – and the Swabian Alps in the South West. The suitability for this area of a wind turbine with a hub height of 103 meters was granted by TÜV SÜD in June 2013 according to DIN EN 1998-1/NA:2011.

The eno 92 with a hub height of 123 meters is under approval testing by the Hamburg construction authority. For a small investment, the turbine offers good economic viability since it takes pretty much to the limit the height constraints for the relatively economical construction of towers in steel. In Schöner-

linde near Berlin, three of these turbines have already been built by the Berlin water company.

The official Germn civil engineering institution - das Deutsche Institut für Bautechnik – is examining the eno 92 according to the DIBt guidelines for wind turbines with a result expected in the third quarter. Where type testing is already completed, the civil engineering test procedures for gaining building approval can be significantly shortened.

The overall certification process for the 3.5 MW platform is proceeding as plannd. Prototype confirmation for different hub heights was obtained in April 2013. Furthermore, the SDL – or system service – capability of its electrical properties has been confirmed. The electrical system of the eno 114 is similar to that of the already EZE-certified eno 82: both have an electrically excited synchronous generator, a DC link and a full power converter.

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Turbine

Efficient wind farms.

For a clean future.

It is our goal to make wind energy more efficient.

Economic success of renewable energies and the growing importance of climate protection go hand in hand. Our contribution to the success of the energy turnaround.

Contact: sales@eno-energy.com

eno 82

eno 92

eno 100

eno 114

eno 126

2,05 MW IEC lla

2,2 MW IEC lIla

2,2 MW IEC IIIa

3,5 MW IEC lls

3,5 MW IEC llIs

Windklasse I

Windklasse II

Windklasse III

eno 82 eno 92 eno 100 eno 114 eno 126

www.eno-energy.com