hvdc grids for pan-european power system development · pdf filehvdc grids for pan-european...

© Siemens AG 2015 All rights reserved. siemens.com/energy-management

HVDC Grids for Pan-European Power System Development

and Integration of Renewable Energy Sources

Life Needs Power / April 13, 2015 / Hannover Messe

Dr. Frank Schettler, Siemens AG, Energy Management

[email protected]

13 April 2015

© Siemens AG 2015 All rights reserved.

Dr. Frank Schettler siemens.com/energy-management

ᐅ Options for European Power System

Strengthening

ᐅ Benefits of HVDC Transmission

ᐅ HVDC Technologies

ᐅ New Solutions for Offshore Wind

ᐅ Chances and Challenges with HVDC Grids

ᐅ Activities for HVDC Grid Standardization



13 April 2015



European Power System Development

Technical Requirements

100 Main Bottlenecks in Europe in 2020* Source: ENTSO-E TYNDP 2014

Centralized and de-centralized RES replacing

conventional generation require:

ᐅ increased bulk transmission capacity,

especially long distance

ᐅ connections to remote RES (e.g. offshore)

ᐅ high reliability and system resilience

ᐅ stability functions to adapt to changing load

flow conditions

About 100 bottlenecks identified until 2030

HVDC provides the solution:

ᐅ dedicated to high power long distance

transmission

ᐅ low power losses

ᐅ precise power flow control

ᐅ proven for more than 60 years

13 April 2015



European Energy Supply

Drivers and Scenarios

Acceptance of society

Security of Supply

CO2 reduction, availability of resources

Investment security, future-proof design

Reasonable cost

13 April 2015



HVDC plays a Key Role

Modular Multilevel Converters are excellently suited

Benefits of HVDC PLUS

ᐅ Modular adapting to transmission capacity

needed

ᐅ Compact, e.g. offshore platforms

ᐅ Smooth and independent

active and reactive power

ᐅ Important ancillary services, e.g. system

recovery, load flow control, stabilizing

functions

ᐅ Low AC and DC system interference due to

perfect voltage and current wave shapes

ᐅ Optimized solutions for cable and overhead

line transmission as well as HVDC Grids

ᐅ Proven by more than 5300 MW

installed capacity in operation or under

commissioning

13 April 2015



First of its kind

HVDC PLUS transmission

A remarkable History of Innovation

Project Power in operation

(year)

Trans Bay Cable 400 MW 2010

HelWin 1 576 MW 2015

HelWin 2 690 MW 2015

SylWin 1 864 MW 2015

BorWin 2 800 MW 2015

Inelfe 2 x 1000 MW 2015

BorWin 3 900 MW 2019

All offshore platforms successfully

installed in the North Sea

HelWin 1 and BorWin 2

in commercial operation

Inelfe Converter Station Baixas

Sylwin Alpha Converter Station

13 April 2015



HVDC PLUS Technologies

Optimized for various Applications

Cable Systems

ᐅ Half Bridge MMC

as used in all HVDC PLUS

projects so far

ᐅ Loss Optimized

ᐅ DC fault clearing by AC side

station circuit breakers

ᐅ Typical Power Ratings per

system:

• Symmetric Monopoles

320 kVdc, 1000 MW today

320 kVdc, 1250 MW 2016

• Bipoles


500 kVdc, 2000 MW 2016

Overhead Lines

and HVDC Grids

ᐅ Full Bridge MMC

as used in more than 80

industrial and transmission

applications

ᐅ Fast DC fault recovery by

controlling DC fault currents

and soft restart

ᐅ Variable DC voltage for

extended HVDC Grids or

severe weather conditions

ᐅ Typical Power Ratings per

system:

• Bipoles


Inelfe SVC PLUS

13 April 2015



Optimized Solutions for Offshore Wind

Onshore HVDC PLUS

converter station

Onshore HVDC PLUS

converter station

AC platforms Distributed small

DC platforms

Large central

DC platform

DC smoothing

reactors

Rectifier Transformer

Diode Rectifier Unit (DRU)

connecting the AC windpark grid to the

DC multi-terminal network

Nominal power: 200 MW

Nominal voltage AC: 66 kV

Nominal voltage DC: 106,7 kV

Size fits for transport by road and ship

Bio degradable and low flammable

ester insulation

Cooling

13 April 2015



HVDC Grids provide attractive solutions

ᐅ collect energy from different sources

ᐅ connect generation and bulk energy storages

(e.g. pumped storage)

ᐅ T-connect wind parks into interconnectors

ᐅ provide reliability and fast recovery

HVDC Grids

The next step in European Power Grid Innovation?

Challenges

ᐅ limited rights of way and remote power plants

(e.g. wind parks)

ᐅ fluctuating power generation by RES

wind and solar

ᐅ high degree of utilization

ᐅ high reliability requirements (n-1 principle)

7 International WGs

CENELEC TC8X/WG 06

Existing/executed projects

Projects up to 2025Projects beyond 2025Vision DC Overlay grid

Based on ENTSO-E's TYNDP, MedGrid, Desertec, FOSG…

13 April 2015



HVDC Grids

A Scenario for a step by step evolution

► First stage

HVDC grids connecting

a small number of converter

stations are established.

ᐅ Full Bridge MMC

in combination with

fast disconnectors provide

reliable and cost efficient

fault clearing and fast recovery

► Subsequent stage

The small HVDC Grids

become interconnected

ᐅ Full Bridge MMC provides increased DC voltage control range as needed for longer transmission

distances

ᐅ Selectivity between sub grids may need additional fast switching devices, like fault current limiters

or DC Breaker

The expected step by step growth of HVDC Grids

requires standardisation of HVDC Grid design and operating principles.

13 April 2015



Standardization of HVDC Grids

has started in Europe

The work builds on the findings of the European HVDC Grid Study Group

(2010 to 2012) with the following objectives:

ᐅ Elaborating technical Guidelines and Functional Specifications

for radial HVDC Grid Systems

ᐅ Elaborating technical Guidelines and Functional Specifications

including applications in meshed HVDC Grid Systems

ᐅ Identification of items for HVDC Grid System standardisation

ᐅ Elaboration of the HVDC Grid System standards

CENELEC TC8X/WG 06 "HVDC Grids"

13 April 2015



Summary

ᐅ Options for European Power System

Strengthening

ᐅ Benefits of HVDC Transmission

ᐅ HVDC Technologies

ᐅ New Solutions for Offshore Wind

ᐅ Chances and Challenges with HVDC Grids

ᐅ Activities for HVDC Grid Standardization



13 April 2015



Energizing the change Technology for a sustainable future

hvdc grids for pan-european power system development · pdf filehvdc grids for pan-european...

Documents