Advanced SIPS using PMU and SCADA data - EPCC … · PMU: Phasor Measurement Unit, PDC: Phasor Data...

© Hitachi, Ltd. 2013. All rights reserved.

Yutaka Kokai

Hitachi America, Ltd.

Advanced SIPS using PMU

and SCADA data

June 3, 2013

Copy Right © Hitachi, Ltd. 2013. All rights reserved.

Hitachi Group’s Industry Segments


Key Strategy of Hitachi Group

2


Hitachi’s Smart Grid Technology and Solutions

変換用変圧器変換器建屋

STATCOM HVDC

Advanced SCADA/DMS HEMS, Demand Response

STATCOM for Distribution

Wide Area Protection System

Energy Storage System

EV Charging System

ＭＤＭシステム

検針値収集

システム監視開閉器制御

検針値保存業務連携

AMI, MDM system

Generation T&D

Customer


Transmission Network Distribution Network

Wind farm

Thermal power plant Solar power plant

Substation

Decides countermeasures

Central Simulation Server

Stabilizing command

Battery Storage (10s MW) Substation

Central control unit

ASPS(Adjustable-Speed Pumped-Storage system) (100s MW)

Countermeasure downloading (Periodically)

Real-time monitoring of data

Dynamics simulations

Distribution substation

PMU

PMU PMU

PDC

PMU

変換用変圧器変換器建屋

STATCOM (10s-100s MVar)

PMU

Substation

PMU

PDC

V

P

Rotor angle

5 (S) ０

Next-generation SIPS by IT & FACTS technologies

Preventing large-scale power blackout More reliable and more flexible network operation available

PMU: Phasor Measurement Unit, PDC: Phasor Data Concentrator

Copy Right © Hitachi, Ltd. 2013. All rights reserved. 5

TTC before SIPS applied

Po

wer

Flo

w

Voltage

Thermal limit

TTC

Stability limit

TTC after SIPS applied P

ow

er

Flo

w

Thermal limit

TTC

Stability limit

Transient

Transient

Stability limit Voltage

Stability limit

Increased TTC (Total Transfer Capability)


On-line TSC and ISC developed by

Chubu Electric Power Company, Hitachi, Toshiba and Mitsubishi

Source: A. Takeuchi, Y. Niwa, M. Nakane, T. Miura, "Performance Evaluation of the On-line Transient Stability Control System (On-line TSC System) ", IEEE, 2006

K. Anzai, H. Ito, M. Yatsu, Y. Hara, H. Horii, "Development of New SPS with Online DSA Function and Its Verification Technique Using RTDS ", PSCC, August, 2011

Recent SIPS in Japan


Configuration of On-line TSC

State estimation for on-line data

Transient stability calculation for contingencies

Selection of shedding generator

based on its acceleration

Preset data (generators to be shed vs. a fault)

Trip signal to generator

main CB

Protective relay for bus fault or line fault

Generator

shedding

Pre-Processing

Emergency Control (within 150ms) Fault

Fault

Report

Protective relay

for generator

(functions as fail-

safe relay)

Calculation (every 30s)

X 1 X 14 X 44

TSC-P TSC-C TSC-T

EMS/ SCADA

DB (Impedance,

SV/TM position

etc. ) is converted

for maintenance.


500kV double-circuit Line

Line monitored by on-line TSC system

Substation

Switching Station Power Station

Frequency Converter Station

Trunk Power System

Shin-mikawa Power Source System

Pacific Ocean

BTB

TSC-P (Parent) : 1

TSC-C(Child): 14

TSC-T(Terminal): 44

Tobu Power Source System

Seibu Power Source System

Tokyo EPCO

Tokyo EPCO

Kansai EPCO

275kV double-circuit Line

0 100 SCALE OF MILES

On-line TSC covers bulk transmission areas

Maximum demand of CEPCO: 28 GW


Increase of TTC of the transmission lines for high efficiency

combined cycle generators gives CEPCO 800k$ benefit a day.

TTC before on-line TSC applied -

Actual Power Flow

0

500

1,000

1,500

2,000

2,500

3,000

3,500

4,000

0 3 6 9 12 15 18 21 0 Time (hour)

Po

wer

Flo

w (

MW

)

TTC after on-line TSC applied

Actual Result of Increased TTC


Correlation between the Line Flow and the

Required Generation Shedding Amount

Since the required

shedding amount

changes greatly,

on-line transient

simulation is

indispensable to

keep the stability.

0

200

400

600

800

1000

1200

1400

1600

1800

2000

3000

Am

ou

nt

of

Gen

erati

on

Sh

edd

ing

(M

W)

3200 3400 3600 Power Flow (MW)

1100MW

3800 4000

Assumed fault: 3-phase 4-line-to-ground fault on 275kV double circuit transmission line with fast reclosing at 400 ms on a circuit


ISC(Integrated Stability Control ) System

　　 500kV transmission line


ISC-P ISC-Parent equipment

ISC-C ISC-Child equipment

ISC-T ISC-Terminal equipment

Note

500kV bulk power system

ISC-T

ISC-P

ISC-T

ISC-T ISC-TISC-TISC-TISC-T

ISC-T

about 300km

STATCOM 450MVA(150MVA*3systems)

ST

AT

CO

M

Large-scale thermal power plant2380MW (595MW*4units)First unit to be operated in July, 2012

Pre-calculation results

Control outputs

ISC-C

Ｇ






Note






Note

500kV bulk power system

ISC-T

ISC-P

ISC-T

ISC-T ISC-TISC-TISC-TISC-T

ISC-T

about 300km

STATCOM 450MVA(150MVA*3systems)

ST

AT

CO

M

Large-scale thermal power plant2380MW (595MW*4units)First unit to be operated in July, 2012

Pre-calculation results

Control outputs

ISC-C

ＧＧ

Transient stability

Voltage control

Frequency control


Voltage control after generator shedding

Generator shedding in order to

maintain transient stability

Generator shedding and switching control of reactive

power sources in order to maintain transient stability

and restrain oscillation

1

1 1 1 1

2

2 2 2 23

3 3 3 3

4

4 4 4 4

5

5 5 5 56

6 6 6 6

0.60

0.80

1.00

1.20

0.0 1.0 2.0 3.0 4.02.00.0 3.01.0[s]

1.2

1.0

0.8

[p.u.]

0.6-1.0

1

1

1

1

1

22

22

3

3

3

33

4

4

4

44

5

5

5

55

6

6

6

66

0.60

0.80

1.00

1.20

0.0 1.0 2.0 3.0 4.02.00.0 3.01.0[s]

1.2

[p.u.]

0.6-1.0

Voltage rise

Voltage drop

1.0

0.8

Voltage rise and drop

restrainedFault Fault

1

1 1 1 1

2

2 2 2 23

3 3 3 3

4

4 4 4 4

5

5 5 5 56

6 6 6 6

0.60

0.80

1.00

1.20

0.0 1.0 2.0 3.0 4.02.00.0 3.01.0[s]

1.2

1.0

0.8

[p.u.]

0.6-1.0

1

1

1

1

1

22

22

3

3

3

33

4

4

4

44

5

5

5

55

6

6

6

66

0.60

0.80

1.00

1.20

0.0 1.0 2.0 3.0 4.02.00.0 3.01.0[s]

1.2

[p.u.]

0.6-1.0

Voltage rise

Voltage drop

1.0

0.8

Voltage rise and drop

restrainedFault Fault

Generator shedding

Generator shedding and switching control of reactive power sources


Increased TTC by ISC & STATCOM

<No measure>

2400MW

1100MW

2000MW

TTC

Current capacity

of transmission line

Transient stability limit

Steady-state stability limit

<ISC>

TTC

Enhancement of TTC almost double

<ISC & STATCOM>

This system began its operation in May 2012, corresponding with the start of operation of a large-scale thermal power plant.


Load PL

Ｇ１

WT

Tr

500kV

230kV

20kV

14

Fault Fault Clear

Load ＰL

PV Output

Time(s)

Rotor angles of G1, G2,G3

5 (S) ０

Case A

Case B

3 cycles

Difference of DER dynamics upon a fault may affect the transient stability of generators. Maximum swing of rotor angles changes （1st peak，1st bottom, 2nd peak and 2nd bottom).

PV, WT and load PL dynamics should be monitored and analyzed on-line.

Future Issue: DERs affect transient stability and voltage stability

PV

Main Grid

Fault

Case A

Case B

Voltage


Challenges to Next-generation SIPS

Off-line SIPS

Static Parameter Setting (Conventional technology)

Protective relays

Calculate parameter of

protective relay off-line

Set parameters

manually at sites

On-line SIPS

Dynamic Parameter Setting (Emerging technology)

Periodical

download of

parameters

Calculate parameter of

protective relay on-line

Protective relays

Synchrophasor

(Emerging technology)

PDC

PMU PMU PMU

Transient Stability

5 (S) 0

Voltage Stability

Rotor angle V

P

Small Signal Stability

30 (S) 0

Frequency

Intermittent output of Renewable Energy

60


Online simulation technology + Synchrophasor data use (Pre-event detailed analysis) (Pre-event & Post-event controls)


Transmission Network Distribution Network

Wind farm

Thermal power plant Solar power plant

Substation

Decides countermeasures

Central Simulation Server

Stabilizing command

Battery Storage (10s MW)

Substation Central control unit

ASPS(Adjustable-Speed Pumped-Storage system) (100s MW)

Countermeasure downloading (Periodically)

Real-time monitoring of data

Dynamics simulations

Distribution substation

PMU

PMU PMU

PDC

PMU

変換用変圧器変換器建屋STATCOM (10s-100s MVar)

PMU

Substation

PMU

PDC

V

P

Rotor angle

5 (S) ０

Next-generation SIPS by IT & FACTS technologies

Preventing large-scale power blackout More reliable and more flexible network operation available


Advanced SIPS using PMU and SCADA data - EPCC … · PMU: Phasor Measurement Unit, PDC: Phasor Data...

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Transcript of Advanced SIPS using PMU and SCADA data - EPCC … · PMU: Phasor Measurement Unit, PDC: Phasor Data...