130617 smart transmission system by hvdc and facts · smart transmission system by hvdc and facts...

1 06-2013 Power Transmission SolutionsE T TS P EN SE1/Th1 06-2013

Energy Sector

© Siemens AG 2013

Smart Transmission System by HVDC and FACTS

Towards carbon free society through smarter grids

Grenoble France, 16-20 June 2013

P.Thepparat, D.Retzmann, E.Ogée and M.Wiesinger

Presented by: Antoine Larger

2 06-2013 Power Transmission SolutionsE T TS P EN SE1/Th

Overview

1. Challenge in Generation, Transmission and Distribution

2. Benefits for Power System Enhancement by HVDC and FACTS

3. HVDC and FACTS Solutions and Applications

4. Conclusions



1.

3 Power Transmission SolutionsE T TS P EN SE1/Th06-2013

Generation, Transmission and Distribution

hallenge in


Two Megatrends are affecting the Power Markets:“Demographic Change” and “Urbanization”

4 E T TS P EN SE1/Th Power Transmission Solutions06-2013

Increase in private Power Demand– mainly a Distribution Issue

More Load Centers with extremely high Power Demand – Impact onthe whole T&D Grid Structure


That is, we have huge Challenges in Power Generation, Transmission and Distribution

Urbanization, Megacities

Scarcity of Natural Resources

Environmental Awareness

Higher Energy Demand

Open Power Markets

Capacity Increase and Bulk Power Trans-mission over longDistances

Increased Use of Distributed Generation and Renewable Energy Resources

Power Distribution within congested Areas and Megacities

Goal: flexible, efficient and secure Grids


Power Transmission Solutions: From Energy Chain to Power Matrix – the Smart Grid with Energy Mix …

6 Power Transmission Solutions

… plus HVDC and FACTS

E T TS P EN SE1/Th06-2013


B2.

by HVDC and FACTS

7 Power Transmission SolutionsE T TS P EN SE1/Th

enefits for System Enhancement

06-2013

8 06-2013 Power Transmission SolutionsE T TS P EN SE1/Th8 Power Transmission Solutions

FACTS – Flexible AC Transmission Systems: Support of Power Flow

Shunt Compensation:

SVC – Static Var Compensator (Standard for Voltage Control)

SVC PLUS (= STATCOM – Static Synchronous Compensator, fast VSC)

Series Compensation:

FSC – Fixed Series Compensation

Increase in Transmission Capacity

TPSC – Thyristor Protected Series Compensation

Increase in Transmission Capacity

TCSC – Thyristor Controlled Series Compensation

Damping of Power Oscillations

Load-Flow Control

Mitigation of SSR

Features of FACTS


9 06-2013 Power Transmission SolutionsE T TS P EN SE1/Th9 Power Transmission Solutions

HVDC – High-Voltage DC Transmission: It makes P flow

With DC, Overhead Line Losses are typically 30-50 % less than with AC

For Cable Transmission (over 80 km), HVDC is the only Solution

HVDC can be integrated into the AC Systems

HVDC supports AC in Terms of Stability

System Interconnection with HVDC and Integration of HVDC:

DC is a “Firewall” against Cascading Disturbances

Bidirectional Control of Power Flow – quite easy

Frequency, Voltage and POD Control available

Staging of the Links – with DC quite easy

No Increase in Short-Circuit Power

DC is a Stability Booster

Features of HVDC Transmission



For Redundancy - 2 Lines: x 2


Comparison of Towers for 800 kV AC Line a) and 500 kV DC Line b), at same Transmission Capacity

DC versus AC – a View of the Tower Geometry

06-2013

3,000 MW


Benefits of Hybrid System Interconnections

11 Power Transmission SolutionsE T TS P EN SE1/Th06-2013

System stable

System unstable

DC supports AC in Terms of Stability


Staged Fault Tests: TCSCs & FSCs, recorded at Serra da Mesa (Light Load *) – Furnas/Brazil

PLINE

0 MW

-880 MW

0 Ω

50 Ω

ZTCSC

5s/Div

5 FSCs 5 FSCs

PLINE

0 MW

-880 MW

0 Ω

50 Ω

ZTCSC

5s/Div

PLINE

0 MW

-880 MW

0 Ω

50 Ω

ZTCSC

5s/Div

No TCSCTCSC: System unstable –Line Trip after 70 s 1 TCSC – System stable

2 TCSCs – Redundant Job Sharing1,000 km AC Line – 500 kV

* Heavy Load: 2 TCSCs are essential

TCSCTCSC TCSCTCSC


Application of FACTS for Stability Improvementin AC Interconnections – some Examples

13 Power Transmission SolutionsE T TS 2/Re

System A System B

SVC SVC

TCSC

TCSC

4 x 250 km P = 2500 MW(P = 1700 MW)500 kV

a

A BC

D E

500 kV

Permanent 3-ph Fault –no Auto-Reclosure

02-2013

14 06-2013 Power Transmission SolutionsE T TS P EN SE1/Th14 Power Transmission SolutionsE T TS P EN SE1/Th

1700 MWtransmitted

power

2500 MWtransmittedpower

2,500 MW transmitted Power

1,700 MW transmitted

Power

System Performance without SVC

06-2013

15 06-2013 Power Transmission SolutionsE T TS P EN SE1/Th15 Power Transmission SolutionsE T TS P EN SE1/Th

one SVCinOperation

two SVCsinOperation

2,500 MW transmitted Power

System Performance with SVC

06-2013


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3.

06-2013

VDC and FACTSSolutions and Applications


SVCs Classic Projects in Saudi Arabia

Improvement of the rapid reactive power voltage support by SVCs is required to prevent voltage collapse or motor stalling at least during single-phase to ground fault.

Hiteen SVS (800Mvar Cap. – 200Mvar Ind.) directly in Riyadh, Capital of Saudi Arabia

Qassim SVC (450Mvar Cap. – 150Mvar Ind.)located in the City of Qassim, 400 km Northwest of Riyadh

Afif SVC (100Mvar Cap. – 50Mvar Ind.)located in the City of Afif, 450 km West of Riyadh

Saudi Arabia’s power system has continuously increased, 80% of Loads in summer are air-conditioners.


Europe: New DC Submarine Cable Link in UK


Deeside

HVDC and STATCOMin parallel OperationHVDC and STATCOMin parallel Operation

World’s 1st

HVDC with600 kV DC Cable

Customer:National Grid / Scottish Power

System Data:Rating 2,200 MWVoltage ± 600 kV DCThyristor 8 kV LTT 2015

SVC PLUS C: 2 x 125 MVArDynamic Voltage Stabilization Reactive Power Control

6 hrs Overload 2,400 MW (Cable)

Western HVDC Link, UK

No Increase inShort-Circuit Power

Bypassing overloadedOnshore Overhead Lines

Power Exchange

Increase in Stability


SVC PLUSProjects and References – Blackwater

Blackwater SVCs, Queensland (Wycarbah, Duringa, Bluff), Australia

Customer:Powerlink Queensland

Scope:3 x SVC PLUS at 3 siteseach ± 100 MVAr SVC PLUS, 132 kV

Special Feature / Purpose:Open Rack Solution Load Balancing

In Service Date:July - September 2012


SVC PLUS with Queensland Railways


100MVA132/30.4kV

-100 to +100MVAr

30/40MVA132/50kV

Feeder

Catenary

AutoTransformers

40+4

132kVFeeder

Unbalance System (Negative Phase Sequence)Voltage Fluctuations (Unbalance Reactive Power)

Solution:Installation of SVC PLUS (±100Mvar) at Bluff, Wycarbah and DuaringaSubstations

Why SVC PLUS:Low Power Losses, then low operation CostsSVCs PLUS have extremely low Harmonic Generation (without Filters) allow safe design for Harmonic Interaction


Customer

Project Name

Location

Power Rating

Type of Plant

Voltage Level

Type of Semiconductor

INELFE, Project JV RTE & REE

INELFE

Santa Llogaia, EspañaBaixas, Francia

2 x 1,000 MW

HVDC PLUS Underground Cable approx. 65 km

± 320 kV DC

IGBT

HVDC PLUSINELFE – 2 x 1000 MW

2014


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G ~G ~G ~ G ~G ~G ~

SIEMENSScope

Santa Llogaia(REE, Spain)

400 kV AC 400 kVAC+/- 320 kV DC

Advantage of four (4) XLPE Cables for lower Voltage and Current

Advantage similar to HVDC Classic Bipole with Metallic Return Conductor

+/- 320 kV DC

Solution with two parallel Links and four Cables 2 Symmetrical Monopoles=

HVDC PLUSINELFE: Two Links – One System

Baixas(RTE, France)


onclusions


4.

C06-2013


Conclusions

Demographic change and urbanization cause a high demand of electrical energy

HVDC and FACTS improve transmission capacity and system stability, and prevent cascading disturbances

HVDC and FACTS play an important role in the Smart Grid Development

130617 smart transmission system by hvdc and facts · smart transmission system by hvdc and facts...

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