simulation of transients with hvdc and facts in large ac ... · simulation of transients with hvdc...

© Siemens AG 2012© Siemens AG 2011Energy Sector

V Hild, D Retzmann, M Schmidt M Luther D. PovhSiemens AG FAU – Uninersity of Erlangen Chief ConsultantErlangen Nuremberg Chairman, IEC TC 115

Simulation of Transients with HVDC and FACTS in large AC systems – Benefits of Power Electronics

Presented by Rajat Majumder, SIEMENS Energy Inc

© Siemens AG 2012Power Transmission Solutions

Planning of Grid Extensions

Feasibility Studies forAC & DC Technologies

Power System Control Energy Management

Load Flow Analysis

System Optimization

Grid Fault Analysis

System Protection –Relay Testing

Controls & Protectionfor AC & DC Systems

Objectives of Power System Simulation …

22

E T PS S/Re

01-2012 E T PS S/Re01-2012

… the Task defines the Tool

© Siemens AG 20123 Power Transmission SolutionsE T PS S/Re

The Spectrum of System Interactions

PowerOscillations Rotor Oscillations of Generators

5 Hz

0 Hz

SubsynchronousResonances

Oscillation of the Turbine Generator Multi-Mass Systems: above approx. 300 MW (in thermal and Nuclear Power Plants, i.e. only “long Shaft Systems”)10 Hz

Very fast Transients

Switching Voltages (Disconnectors etc.)Lightning Overvoltages

40 MHz

10 MHz

Local Oscillations: > 1 HzInter-Area Oscillations: 1 Hz

Power Station - Line - Load50 / 60 HzfN

Power Generationand Transmission

5 kHzTransients &System Interactions

Power ConvertersFerroresonancesTransformer SwitchingGrid Resonances

1 kHz100 Hz

10 kHz

Con

trol

&

Prot

ectio

n

01-2012

© Siemens AG 2012

Example HVDC/FACTS Off-Site Testing

Verification of:

Dynamic PerformanceTransient Performance

with detailed Network Models

4 Power Transmission SolutionsE T PS S/Re01-2012


The Task – Stability Improvement in the System:

Modulation of Series

ImpedanceTCSC

Modulation of Series

ImpedanceTCSC

Modulation of Active

PowerHVDC

Modulation of Active

PowerHVDC

Modulation of Reactive

PowerSVC

Modulation of Reactive

PowerSVC

POD in theAC System

POD in theAC System

Advanced Solutions Conventional Solution

Fully suitable for Inter-Area Oscillations

Application ofPower System

Stabilizer PSS

Application ofPower System

Stabilizer PSS

POD using the Turbine-Generator Unit

POD using the Turbine-Generator Unit

For local Oscillations only

Power OscillationDamping (POD)

Power OscillationDamping (POD)

System Planning to find the best Solution

01-2012

© Siemens AG 2012

NORDEL-UCPTE/CENTREL Interconnections:Studies for new HVDC-Links

6 Power Transmission SolutionsE T PS S/Re

Topics andHighlights of the InterconnectionStudies

90 Generators90 Generators220 Nodes220 Nodes320 Transmission Lines320 Transmission Lines80 Transformers80 Transformers

NORDELNORDEL

8/11 8/11 HVDCHVDC--LinksLinks UCPTE/UCPTE/CENTRELCENTREL400 Generators400 Generators1900 Nodes1900 Nodes3200 Transmission Lines3200 Transmission Lines940 Transformers940 Transformers

01-2012

© Siemens AG 2012

NORDEL-UCPTE/CENTREL Interconnections: Examples of Study Results

0.00 6.25 12.50 18.75 25.00 SEC

-100

0

100

Freq

[mH

z]

DK-GE NL-GE E-F PL-GE

Frequency Deviations of the UCPTE System after Faults

DK-GE NL-GE E-F PL-GE

Fre

q

[mH

z]

-100

0

100

SWE-FI NO/S-SWE/S SWE-DK NO/S-NO/N NO/N-SWE/N

0.00 6.25 12.50 18.75 25.00 SEC

Average Frequency Deviation 40 mHz during 8 s: = 115o

Frequency Deviations of the NORDEL System after Faults

SWE-FI NO/S-SWE/S SWE-DK NO/S-NO/N NO/N-SWE/N

A Fault in NORDEL requires DC for Interconnection


For this Fault in UCPTE, an AC Interconnection would do77

E T PS S/Re

01-2012

© Siemens AG 2012

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

PLINE

0 MW

-880 MW

0

50

ZTCSC

5s/Div

5 FSCs 5 FSCs

PLINE

0 MW

-880 MW

0

50

ZTCSC

5s/Div

PLINE

0 MW

-880 MW

0

50

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

© Siemens AG 2012

GuiyangNayong

AnshunAnshun

Huishui

Hechi

Lubuge

TSQ-ILuoping

HVDC TSQ

LiudongYantan

TCSC & FSCPingguo

Baise

TSQ-II

Nanning

Yulin

Laibin

Hezhou

Gaomin

Luodong

ZhaoqingConv. Stat.

Beijiao Conv. Stat.

Guangzhou

Wuzhou

TSQ Conv. Stat.

Yunnan

Guangxi

Guizhou

Guangdong

HVDC GuiGuang

a – without Power Modulationb – with Power Modulation

of HVDC Controlc – further Improvements with

Pingguo TCSC/FSC

Power Flow in one Line Huishui-Hechi (MW)

Anshun Conv. Stat.

Liuzhou

Zhaoqing

Beijiao

Zhengcheng

Guangxi

Pingguo

FSC

GuiyangNayong

AnshunAnshun

Huishui

Hechi

Lubuge

TSQ-ILuoping

HVDC TSQ

LiudongYantan

TCSC & FSCPingguo

Baise

TSQ-II

Nanning

Yulin

Laibin

Hezhou

Gaomin

Luodong

ZhaoqingConv. Stat.

Beijiao Conv. Stat.

Guangzhou

Wuzhou

TSQ Conv. Stat.

Yunnan

Guangxi

Guizhou

Guangdong

HVDC Gui-Guang I

Anshun Conv. Stat.

Liuzhou

Hydro Power Station Thermal Power Station

Zhaoqing

Beijiao

Zhengcheng

Guangxi

Pingguo

FSC

Power System

5 10 15 200

0

600

900

1200

1500

-600

300

-900

-300

Time (s)

Powe

r flo

w in

one

line

Huish

ui-H

echi

(MVA

)

a

b

ab

c

Dynamic Results

9 Power Transmission Solutions

HVDC Converter Station

TCSC FSC

E T PS S/Re01-2012

China: Benefits of active Damping with HVDC & FACTS in a Hybrid AC-DC System


2b)

2a)

1a)

POD Output Signal (pu) TCSC 1 (= TCSC 2)

POD Output Signal (pu) TCSC 1 (= TCSC 2)

POD Output Signal HVDC (%)

Fast and strong Action of HVDC with POD

HVDC w/o PODMore Action of TCSC required

Less Action of TCSC required HVDC with POD

China: Joint Power Oscillation Damping withHVDC & FACTS in a Hybrid AC-DC System

© Siemens AG 201211 Power Transmission Solutions

Operation Experience in 2005 withZones 1 & 2 Resynchronization

Sources: UCTE & Measurements with WAMS, 5-2005

UCTE synchronous Extension:

Increased Inter-Area Oscillations

Again: Damping Measures necessary

However: who should do it andprovide the Investments ?

Zone 1

Zone 2

Experience with the 2nd Step for System Extension

E T PS S/Re01-2012

© Siemens AG 2012Source: UCTE-IPS/UPS Study – Presentation

Dr. Matthias Luther at FAU Erlangen,Dec. 15, 200912 Power Transmission SolutionsE T PS S/Re01-2012

UCTE–IPS/UPS Interconnection Study: Verification of the Simulation Models – Example UCTE

Measurements 2006 Simulation Model

Thu, 2006-02-09; 11:26:47 - Generation Outage: NUEVA ESCOMBRERAS (ES) dPa=-1200 MW

49,930

49,940

49,950

49,960

49,970

49,980

49,990

50,000

50,010

50,020

50,030

11:26:35 11:26:40 11:26:45 11:26:50 11:26:55 11:27:00 11:27:05 11:27:10 11:27:15 11:27:20

f [Hz]

Portile de Fier (RO)

SS Reyes (ES)

Uchtelfangen (D) Röhrsdorf (D)

49,930

49,950

49,970

49,990

50,010

50,030

0,00 2,00 4,00 6,00 8,00 10,00 12,00 14,00 16,00 18,00 20,00 22,00 24,00 26,00 28,00 30,00

Time [s]

freq

uenc

y [H

z]

ES/PORGERPortile de FierRöhrsdorf

Event: Outage of a 1,200 MW Power Station in Spain (2006-02-09)

© Siemens AG 2012

UCTE*–IPS/UPS Interconnection Study: Results

3000 MW

30 s

Simulation of a 750 kV 3-ph AC Fault

* now CE

e.g. by means of Integration of HVDC

Risk of large Synchronous Interconnections:

Inter-Area Oscillations withMagnitudes up to 3,000 MW

Damping Measures necessary


Source: UCTE-IPS/UPS Study 2008 http://www.ucte-ipsups.org/


NORDEL

Smolensk

Hannover

Moskau

BerlinBorken Warschau

Vilnius

UPS

UCPTECENTREL

HVDC:Length 1800 kmCapacity max. 4 GWVoltage +/- 500 kV

Studies for HVDC Multiterminal

East-West Energy Bridge

01-2012

simulation of transients with hvdc and facts in large ac ... · simulation of transients with hvdc...

Documents