Industrial Solutions and Services Your Success is Our Goal An Advanced Model-based Approach to...

Industrial Solutions and ServicesYour Success is Our Goal

An Advanced Model-based Approach to Stabilize Power System Oscillations Based on the H Theory

Rüdiger Kutzner, Berthold Scholz, Manfred Reimann:

PE

S_2003.P

PT

04.2003 transparency 2


An Advanced Model-based Approach to Stabilize Power System Oscillations

PG G132 / I&S IT PS 151

Analog vs. Digital Control System

Analog vs. Digital

Advanced Model-Based Approach

Modelling

PSS Design

PSS Implementation

On-site Tests

Practical Experience

Summary

PE

S_2003.P

PT




PG G132 / I&S IT PS 151

Advanced Model-Based Approach: 4 Steps

Model of Excitation Control System and Power System

PSS Design

Implementation

Verification by Site Tests

Analog vs. Digital


Modelling

PSS Design

PSS Implementation

On-site Tests


Summary

PE

S_2003.P

PT




PG G132 / I&S IT PS 151

Modeling of Excitation Control System & Power System

SynchronousMachine

RegulatorExciter Synchronous

Machine

Excitation Control System

PowerSystem

Model for PSS Design

Plant Data:Excitation SystemGeneratorPower System

Measurement:Step ResponseFrequency Response

Analog vs. Digital


Modelling

PSS Design

PSS Implementation

On-site Tests


Summary

PE

S_2003.P

PT




PG G132 / I&S IT PS 151

PSS Design Procedure

Model

Requirements

H PSS Synthesis

PSS Implementation Computer Representation

VSI

VST

VSTMAX

VSTMIN

1

1 + sT6

sT5

KS 1 + sT5

1

1 + A1s + A2s2

1 + s T1

1 + s T2

1 + s T3

1 + s T4

TD T1T2 T3

K0K1 K2 K3

-

Pe

Vtref

VSTMAX

VSTMIN

Analog vs. Digital


Modelling

PSS Design

PSS Implementation

On-site Tests


Summary

PE

S_2003.P

PT




PG G132 / I&S IT PS 151

PSS Implementation:Canonical Model

TD T1T2 T3

K0 K1 K2 K3

-

Pe

Vtref

Analog vs. Digital


Modelling

PSS Design

PSS Implementation

On-site Tests


Summary

PE

S_2003.P

PT




PG G132 / I&S IT PS 151

PSS Implementation:Software Realization

K2

-Ti1 Ti2 Ti3

K3K1K0

K

TD Ti4

K4 Vsmin

Vsmax

Pe

VsAnalog vs. Digital


Modelling

PSS Design

PSS Implementation

On-site Tests


Summary

PE

S_2003.P

PT




PG G132 / I&S IT PS 151

On-site Tests: Test set-up

SynchronousMachine

RegulatorExciter Synchronous

Machine-

Vtref

Excitation Control System

PowerSystem

Vt

Analog vs. Digital


Modelling

PSS Design

PSS Implementation

On-site Tests


Summary

PE

S_2003.P

PT




PG G132 / I&S IT PS 151

On-site Tests: Closed Loop Frequency Response

-20

-10

0

10

20

30G

ain

(d

B)

100

Without PSS (measured)

With PSS (measured)

Without PSS (simulated)

With PSS (simulated)

Frequency (Hz) 10110-1

350 MW CCGT: Vtref Pe

Analog vs. Digital


Modelling

PSS Design

PSS Implementation

On-site Tests


Summary

PE

S_2003.P

PT




PG G132 / I&S IT PS 151

On-site Tests: Closed Loop Step Response

Analog vs. Digital


Modelling

PSS Design

PSS Implementation

On-site Tests


Summary

PE

S_2003.P

PT




PG G132 / I&S IT PS 151

Practical Experience: Impact to Voltage Control Loop

10-1 100 101

-20

-10

0

10

20

Frequency [Hz]

Gai

n

[dB

]

Vref P

0 5 10-0.1

-0.05

0

0.05

0.1

t [sec]

Q [

pu]

2% load change

no PSS1. PSS

2. PSS

no PSS 1. PSS

2. PSS

Analog vs. Digital


Modelling

PSS Design

PSS Implementation

On-site Tests


Summary

PE

S_2003.P

PT




PG G132 / I&S IT PS 151

Practical Experience: Influence of Fast Load Ramps

Vt

P-PSS

Pacc-PSS

no PSS

ramp

t

load

t

Analog vs. Digital


Modelling

PSS Design

PSS Implementation

On-site Tests


Summary

PE

S_2003.P

PT




PG G132 / I&S IT PS 151

Countries with SIEMENS digital AVR and PSS

Analog vs. Digital


Modelling

PSS Design

PSS Implementation

On-site Tests


Summary


Thank you very much for your attention.

Contact:

Ruediger KutznerI&S IT PS 151Werner-von-Siemens-Str. 6091050 Erlangen, GermanyPhone: +49 (9131) 7-43244

Mail: [email protected]

Industrial Solutions and Services Your Success is Our Goal An Advanced Model-based Approach to...

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