Risto Ryyn¤nen Fingrid Oyj, Ville Sepp¤nen SIEMENS CASE

Restricted © Siemens Osakeyhtiö 2013. All rights reserved.

Risto Ryynänen Fingrid Oyj, Ville Seppänen SIEMENS

CASE: Estlink2

Sivu 1


BEMIP (Baltic Electricity Market Interconnection Plan)

EstLink 2 is one part of the bigger

package to integrate Baltic eletricity

markets to the Baltic sea area and

European markets.

All interconnections improve also

security of eletricity supply.


2007 2008 2009 2010 2011 2014

Master Plan

NPS Baltic- project

Permits Contracts Agreements ...

Planning EU grant Preplanning

Commitment by Estonian

goverment

BEMIP NPS Price Area

Estonia

Construction Hand over

Baltic Sea Electricity

Market

Price Areas Lithuania 2012

and Latvia 2013

In operation

EstLink 2 time span


• Reduction in Transmission Losses for long

Distances

• Long Overhead Lines with high Transmission

Capacity and limited Right-of-Way

• Long Cable Transmissions

• Asynchronous Interconnections

• No Increase in Short-Circuit Power

• Fast Control of Power Flow

Sivu 4

Why HVDC?

Advantages of HVDC Interconnection

DC System

System 1 System 2

AC AC AC AC DC System

System 1 System 2

AC AC AC AC DC System

System 1 System 2

AC AC AC AC


Owners: Elering AS and Fingrid Oyj

Capacity: 650 MW

DC voltage: 450 kV

Technology: HVDC LCC monopole (Classic) connection

with insulated metallic return

Length of

the connection: ca 170 km:

- Underground cable ca 12 km in Estonia

- Overhead line ca 14 km in Finland

- Sea cable ca 145 km

Budget: ca 320 MEur (EU grant max 100 MEur)

Due date: in the beginning of 2014

EstLink 2 General information


Finland Estonia

14 km 145 km 12 km

400 kV AC

Substation

Anttila

450 kV DC

OHL

450 kV DC

Submarine Cable

450 kV DC

Land Cable

330 kV AC

Substation

Püssi

Gulf of Finland

EstLink 2

~90 m ~90 m 450 kV DC

Transition

Station

Nikuviken

650 MW

Converter

Station

650 MW

Converter

Station


Guizhou- Guangdong

Gezhouba- Nan Qiao

Etzenricht

1993

Wien Südost

1993 Dürnrohr

1983

Basslink Acaray

1981 Lamar

2005

Virginia Smith

1987

Sylmar East

1995 2008

1975/1998 Cahora Bassa

Welsh

1995 2006

2014

2000

Moyle

COMETA

2012

Inter Island Connector Pole 3

2014

2013 Black Sea Transmission

1989

2004

2010 EstLink 2

2007 Neptune BritNed

2011

Tianshengqiao- Guangzhou

Guizhou- Guangdong II

Storebælt

2013 Hudson

2010 Ballia-Bhiwadi

2003/2007 East-South Interconnector

Adani

Thailand- Malaysia

2001

2013 BtB Bangladesh

2012

2013 Xiloudu-

Guangdong

2014 Western Alberta

Transmission Link

Poste Châteauguay

1984

East DC Link Project

2014

Celilo

1997/2004

Nelson River

1977/2004

Western Link

2015

2001

Siemens references


GER FIN EST


EstLink 2 Siemens with numbers

Personals : GER 167, FIN 34, EST34

Subcontractors: 107 pcs. (Direct)

Trucks: 400 pcs. Electrical

Control Cable: 160 km

Grounding network 40 km

Working hours eng. 97 000 h

Working hours at site 152 000 h

DTS 1258

Contract Value: 100’ €

Tender receipt: 20.05.2010

Tender due date: 20.09.2010

Award of Contract: 23.12.2010

Commissioning: 04.12.2013

Taking Over: 06.02.2014

Marriages:3

Baby's: 8 + (3 coming soon)


650 MW

Converter station

400 kV

switchgear

110 kV

switchgear

400 kV

switchgear

110 kV

switchgear

EstLink 2 Anttila substation in Finland in 2010 and 2011


650 MW

Converter station

400 kV

switchgear

110 kV

switchgear

400 kV

switchgear

110 kV

switchgear

650 MW

Converter station

EstLink 2 Anttila substation in Finland in 2012 and 2013


330 kV

switchgear

650 MW

Converter station

EstLink 2 Püssi substation in Estonia in 2010 and 2013


EstLink 2 – Converter Station Layout General Components, Anttila

AC Yard

AC Filters

Transformers

Valve Hall

Control Building

DC Yard

DC Filters


Anttila HVDC Side View

AC 400 kV Substation HVDC 400 kV Yards

HVDC AC Filters

Converter

Transformers Valve Hall

Control Building


v

Filter

type

Tuning frequencies Power

Anttila Püssi

2 x A TT (triple-tuned)

11/13/24

110 Mvar 90 Mvar

1 x B DT (douple-tuned)

3/36

32 Mvar 90 Mvar

1 x C ST (single-tuned)

48

(and 3N in Anttila)

110 Mvar 90 Mvar

• Harmonics generated by the converters

are filtered by the filters

• Four filters / site

• Filters have a multilevel structure, e.g. type A

EstLink 2 – Converter Station Layout

AC Filters


Star

windin

g

Delta

winding

Primar

y

windin

g

+

Three single-phase units (weight a' 230 + 75 t)

Each unit consists of 3 windings:

• AC (261MVA, secondary 186 kV)

• valve star

• valve delta

• 30˚ phase shift between the windings

in the valve-side reduces harmonics

One spare unit / site

EstLink 2 – Converter Station Transformers


Converter Station Transformers without Sound Enclosure


Converter Station Transformers without Sound Enclosure


EstLink 2 – Converter Station Valve Hall

12-pulse bridge

• 64 series connected thyristor levels / valve

of which 2 redundant

• total 768 thyristors a' 4 ''/ 8 kV

Cooling system for removal of heat

from the valves

• max. losses of valves is 2400 kW

• the largest source of the losses is the

conduction losses in the thyristors

• two circuit system, ouside with glygol 4 600 l


• Each thyristor level contains thyristor and voltage grading and damping

components

• 16 thyristor levels are grouped to into one valve section

• 2 valve sections are combined into one modular unit

EstLink 2 –Valve Hall Components

Restricted © Siemens Osakeyhtiö 2013. All rights reserved. Example Storebaelt

Smoothing Reactors DC Capacitors

EstLink 2 – Converter Station DC Yard Anttila


Smooting Reactors

Neutral Cable End

450 kV Cable End

450 kV Surge Arresters

EstLink 2 – Converter Station DC Yard Püssi


Schematic Diagram of HVDC System

Reversal of load flow

U1= 450 kV U2= 445 kV P= 650 MW

Anttila Püssi Id= 1490 A

U1= -445 kV U2= -450 kV

P= 650 MW

Basic Design of HVDC Systems


Basic Design of HVDC Systems, Power revelsals


• Exact Control of Power Flow in either Direction

• Enhancement of AC System Stability

• Reactive Power Control / Support of AC Voltage

• Frequency Control

• Overload Capability

• Emergency Power Functions

• Power Oscillation Damping

HVDC is a Firewall against Cascading Disturbances

HVDC Controllability is beneficial for

Technical Advantages of HVDC Controllability


EstLink 2 Nikuviken transition station


EstLink 2 general information about the subsea cable

Mass impregnated HVDC pole cable with integrated return

conductor (IRC cable)

Only one cable to be installed

Environment friendly

• No water soluble materials

• No free oil

Approximate dimensions

• Weight 76 kg / meter

• Diameter ~ 15 cm

Subsea cable will be buried around 1m into the seabed or

protected in hard bottom areas and shallow water

Crossings with Uraduct or Polyspace Water jetting


EstLink 2 System Testing starting 22nd October 2013


Illustration of the power purchase schedule


One test day


Valokuva tai valokuvia lisää toteutuksesta tähän

• EL2 is proceeding according to the plan!!!

• cumulative amount of near misses is 45 and accidents 8

(disability 95 working days), no serious/ critical accidents!

EstLink 2 summary


EstLink 2 Projekti Toivottaa Hyvää Joulua…


Kiitos.

Sivu 33

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Risto Ryyn¤nen Fingrid Oyj, Ville Sepp¤nen SIEMENS CASE

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