National Polytechnic Institute of Grenoble, France

1
National Polytechnic Institute of Grenoble,
France Power Engineering Laboratory of Grenoble

Critical Infrastructures International
Conference, Grenoble 2004
2
Power Systems Performance Control
objective
power system security
responsibility
system operators
tools
ancillary services
double checking
performance control
Ancillary services from generation performance
control

• Reactive power and voltage control
• Active power and frequency control
• Blackstart
• Network stability

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Q V Performance Control
Ifd

V
Power grid
Efd
Efdmax

Controller
-
Efdmin
V0
AVR
4
Q V Performance Control
Q reserves
AVR output limitations
Efdmax
Efd Ifd
Efd
AVR
Efdmin
Ifd const Q
5
Q V Performance Control
Q scheduled reserve
Q operational reserve
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Intermediate conclusions remarks

• Reactive power reserve is linked to a
  control parameter
• We identified the parameter that corresponds
  to the reactive power reserve
• The reactive power reserve is not a variable
  easy to be
• measured from the exterior, so another way to
  quantify it must be found!
• We are proposing a performance control
  method (research study!!!)

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Performance Control Method Principle
Network complete model
Real network outputs
_

?
Minimization
Estimated parameter
New parameter
?
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Case Study
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Application and results
Eurostag
Steady state data
Load Flow
Dynamic data
Scheduled Q reserve
Controllers parameters
Dynamic simulation - Eurostag batch mode -
IPP scheduled reactive power reserve
Q 45 Pmax
Dynamic scenario
Operational Q reserve
Simulation results analysis - Eurostag batch
mode -
Model outputs
Q 25 Pmax
The connection convention is not respected
Ymod
no

Estimated Q reserve
?
? lt ?
-
yes
Q 28.08 Pmax
Ymeas
Estimated parameter
The connection convention is respected
Performance control program
Measurements

• ? - model - measurements deviation
• e - zero tolerance

10
Conclusions

• Ancillary services performance control method
• Method tested on more test networks
• Robustness to the measurements inaccuracy
• Robustness to the transmission grid model
  imprecision

11
National Polytechnic Institute of Grenoble,
France Power Engineering Laboratory of Grenoble

Critical Infrastructures International
Conference, Grenoble 2004
12
Measurements
Measurement transformer
Power grid
0,15
Measurement processing
Measuring device
5X 10X
0,001
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Measurements
Active Power pu
Time s