Cgre session 2020 C2 C6 316 document

1. CIGRE e-Session 2020
© CIGRE 2020
CIGRE e-Session 2020
C2-C6-316
An advanced method for steady-state security assessment considering dynamic
thermal capacities of grid assets
Michael Schrammel
Presenter: Michael Schrammel
28th August 2020

2. CIGRE e-Session 2020
© CIGRE 2020
CIGRE e-Session 2020
© CIGRE 2020
Motivation
▪ dynamic steady-state and short-term emergency ratings available
▪ possible reduction of remedial actions
▪ short-term emergency rating as maximum permissible load for a given time
▪ small exceedances of steady-state limits maybe longer permissible
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28th August 2020
C2-C6-316_2020

3. CIGRE e-Session 2020
© CIGRE 2020
CIGRE e-Session 2020
© CIGRE 2020
Motivation
▪ multiple short-term emergency ratings for different given durations
▪ determination of maximum permissible operation durations for given operation
scenarios
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28th August 2020
C2-C6-316_2020

4. CIGRE e-Session 2020
© CIGRE 2020
CIGRE e-Session 2020
© CIGRE 2020
Analysis Method
▪ two analysis levels (system level, component level)
▪ system level: load-flow analysis based contingency analysis
▪ component level: time-domain simulation
▪ binary statement extended with minimum duration of permissibility for specific
contingency
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28th August 2020
C2-C6-316_2020

5. CIGRE e-Session 2020
© CIGRE 2020
CIGRE e-Session 2020
© CIGRE 2020
Examination Component Level
▪ determination of minimum permissible operation duration in a specific grid state
▪ loading scenarios with different time of incident
▪ determine duration between event and violating thermal limit
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28th August 2020
C2-C6-316_2020

6. CIGRE e-Session 2020
© CIGRE 2020
CIGRE e-Session 2020
© CIGRE 2020
Interpreting the Simulation Results
▪ minimum of simulation results is permissible operation duration for component
▪ no violation in any scenario → contingency is tolerable
▪ min. of results is max. emergency operation duration of grid for contingency
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28th August 2020
C2-C6-316_2020

7. CIGRE e-Session 2020
© CIGRE 2020
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