Planning guidelines for the integration of FACTS and HVDC...

REALISEGRIDREALISEGRID

Planning guidelines for the integration of FACTS and HVDC into meshed networks

Contributors:Sven Rüberg, Ulf Häger, Technical University of Dortmund, GermanyHelder Ferreira, Gianluca Fulli, Joint Research Centre of the EC, Petten, The NetherlandsAngelo L’Abbate, RSE (former ERSE), Milan, Italy

A. L’AbbateRSE (former ERSE)

Arnhem, September 29th, 2010WP1 Workshop

OutlineOutline

2010-09-29 2TREN/FP7/EN/219123/REALISEGRID

Transmission planning process

Main features of FACTS and HVDC

Integrating FACTS and HVDC into planningprocesses• Transmission capacity increase• Grid connection of offshore windfarms

Potential for FACTS and embedded HVDC in Europe

Transmission Transmission planningplanning

3TREN/FP7/EN/219123/REALISEGRID2010-09-29

Scenarios development

Security analysis

Security criteria

met?No expansion

Y

NIdentification of

first, broad group of solutions

Techno-economic

assessment

Environmental/ social

assessment

Final ranking of solutions

Identification of second, restricted group of solutions

Decision making

Cost-benefit analysisTraditional approach

REALISEGRIDproposedapproach

Basic stages ofplanning process

4TREN/FP7/EN/219123/REALISEGRIDTREN/2010-09-2901/10/2009 4

Classification of FACTS DevicesClassification of FACTS DevicesShunt Devices• Static Var Compensator (SVC)• Static Synchronous Compensator (STATCOM)

Series Devices• Thyristor Controlled Series Capacitor (TCSC)• Static Synchronous Series Compensator (SSSC)

Combined Devices• Thyristor Controlled Phase Shifting Transformer (TCPST)• Dynamic Flow Controller (DFC)• Interline Power Flow Controller (IPFC)• Unified Power Flow Controller (UPFC)

FP7/EN/219123/REALISEGRID

Main features of FACTS and HVDCMain features of FACTS and HVDC


FACTS / HVDC device

Transmission capacity increase

Power flow control

Transient stability enhancement

Voltage stability enhancement

Power oscillation damping

SVC ■ ■ ■ ■■■ ■■

TCSC ■■■ ■■ ■■■ ■ ■■

TCPST ■■ ■■ ■■ ■ ■■

DFC1 ■■ ■■ ■■ ■■ ■■

STATCOM ■ ■ ■■ ■■■ ■■

SSSC ■■■ ■■■ ■■■ ■ ■■

IPFC ■■■ ■■■ ■■■ ■■ ■■

UPFC ■■■ ■■■ ■■■ ■■■ ■■■

CSC-HVDC ■■■ ■■■ ■■ ■ ■■

VSC-HVDC ■■ ■■■ ■■■ ■■ ■■■

Legenda: ■ — Small; ■■ — Medium; ■■■ — Strong; (1)

estimated value, not enough experience yet

PlanningPlanning FACTS and HVDCFACTS and HVDC

Typical issues to be solved by transmission planners:• Transmission capacity increase• Grid connection of offshore wind parks

Conventional approach to transmission capacityincrease issue:• Upgrading/uprating of existing assets• Rationalisation measures (also downstream)• Possible exploitation of other means (e.g. hydro-pumping)• Building up of new assets

Alternative approach to transmission capacityincrease issue:• Use of new technologies (HTC, FACTS, HVDC, PST,

RTTR..) 6TREN/FP7/EN/219123/REALISEGRID2010-09-29

PlanningPlanning FACTSFACTS

Power flow control

• Transmission capacity increase• Shift of power to under-utilized lines / zones• Slow control by PST• Fast control by FACTS (dynamic stability limit)

Fast installation within a short time horizonNo new transmission lines necessaryOnly small / medium investments

Review of the (n-1) security criterion applicationPotentially limited increase of transmission capacity


8TREN/FP7/EN/219123/REALISEGRID

PlanningPlanning FACTSFACTS

2010-09-29

PlanningPlanning HVAC vs. HVDCHVAC vs. HVDC

Upgrading / Uprating of existing assets

• Increase of operating voltage• Increase of power capacity (by HTC)

Fast installation within a short-time horizonIn general no new / additional right of way necessaryOnly small / medium investments

Only limited increase of transmission capacityMaximum configuration may be already reached

Conversion of HVAC to HVDC



Transmission capacity increase

Upgrade to 380kV possible?

Upgrade equipment to

380kV

Ampacity upgrade possible?

Conversion to HVDC feasible?

Change overhead

conductors

Convert to HVDC

New transmission capacity sufficient?

Built new line

done

Yes

No

Yes

Yes

No

No

Yes

No

PlanningPlanning: HVAC vs. HVDC: HVAC vs. HVDC

2010-09-29

PlanningPlanning HVAC vs. HVDCHVAC vs. HVDC

Offshore wind park connection


Offshore connection

First list of solutions

Techno-economic

assessment

HVAC cable HVDC cable

VSC-HVDCCSC-HVDC

2010-09-29

FACTS and HVDC in EuropeFACTS and HVDC in Europe


FACTS potential in EuropeFACTS potential in Europe

SSSC in Spain (pilot project)SVC/STATCON in Italy (under study)SVC/series controllers in Germany (under study)SVC in Finland (completed)SVC in France (Brittany) (planned)Series/shunt controllers in Poland (under study)SVCs in Norway (completed)


HVDC HVDC embeddedembedded in in thethe AC AC systemsystem

France – Spain (2000 MW, ±320 kV, 2x65 km DC underground cable, VSC-HVDC)Sweden – Norway (1200 MW, mixedOHL/underground cable, MT-VSC-HVDC)Italy – France (1000 MW, ±320 kV, 2x190 km DC underground cable, VSC-HVDC)Finland – Sweden (800 MW, 500 kV, 103 km DC OHL, 200 km DC submarine cable, CSC-HVDC)


Ongoing projects in Europe

2010-09-29

ConclusionsConclusionsInserting innovative devices (like FACTS, HVDC) in thetransmission planning processes is a key issue thatTSOs are currently facingFACTS devices may play an important role in thedevelopment of future European system towards RES targets (2020 and beyond)Shunt FACTS are more and more used nowadayswhile series/combined FACTS are not yet at a maturitystage for application in Europe (progress ongoing) In addition to traditional HVDC applications, VSC-HVDC is expected to be further extensively used in Europe for multi-terminal offshore grids and forembedded links within the synchronous system as well as in supergrid visionsIn any case a sound cost-benefit analysis is required



Thank you for the attentionContact: Dr. Angelo L’Abbate

Ricerca sul Sistema Energetico (RSE)Milan, Italy

[email protected]

REALISEGRID projecthttp://realisegrid.erse-web.it/

mailto:[email protected]

Planning guidelines for the integration of FACTS and HVDC...

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