Abstract
| Original language | English |
|---|---|
| Title of host publication | Proceedings of 2018 Power Systems Computation Conference |
| Number of pages | 7 |
| Publisher | IEEE |
| Publication date | 2018 |
| Pages | 7 pp. |
| ISBN (Print) | 9781910963104 |
| DOIs | |
| Publication status | Published - 2018 |
| Event | 20th Power Systems Computation Conference - O’Brien Centre for Science at University College Dublin, Dublin, Ireland Duration: 11 Jun 2018 → 15 Jun 2018 Conference number: 20 http://www.pscc2018.net/index.html |
Conference
| Conference | 20th Power Systems Computation Conference |
|---|---|
| Number | 20 |
| Location | O’Brien Centre for Science at University College Dublin |
| Country | Ireland |
| City | Dublin |
| Period | 11/06/2018 → 15/06/2018 |
| Internet address |
Keywords
- Power system analysis computing
- Real-time assessment
- Thevenin equivalent
- Wide-area monitoring
- Power system stability indicators
Cite this
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Evaluation of Factorization Methods for Thévenin Equivalent Computations in Real-Time Stability Assessment. / Hildebrandt, Christina; Karatas, Bahtiyar Can; Glarbo Muller, Jakob; Johannsson, Hjortur.
Proceedings of 2018 Power Systems Computation Conference. IEEE, 2018. p. 7 pp.Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review
TY - GEN
T1 - Evaluation of Factorization Methods for Thévenin Equivalent Computations in Real-Time Stability Assessment
AU - Hildebrandt, Christina
AU - Karatas, Bahtiyar Can
AU - Glarbo Muller, Jakob
AU - Johannsson, Hjortur
PY - 2018
Y1 - 2018
N2 - Thevenin equivalents are used by a range of power system stability indicators, such as the L-index for voltage stability and the aperiodic small signal rotor angle stability indicator. This paper investigates the effect of using different factorization methods for computing coefficients for wide-area Thevenin equivalents. Direct and incomplete factorization methods are compared with respect to runtime, accuracy and amount of fill-in. The paper introduces a proof that the block triangular form of bus admittance matrices will have no non-zero entries in the off-diagonal. KLU factorization is found to perform almost twice as fast as the standard LU factorization with no cost of accuracy. It is, however, shown that the largest computational workload is associated with dense matrix multiplications. An incomplete method reduces the fill-in of coefficient matrices at the cost of accuracy in Thevenin voltages. It is shown, that inaccuracies are amplified as the L-index approaches the stability limit.
AB - Thevenin equivalents are used by a range of power system stability indicators, such as the L-index for voltage stability and the aperiodic small signal rotor angle stability indicator. This paper investigates the effect of using different factorization methods for computing coefficients for wide-area Thevenin equivalents. Direct and incomplete factorization methods are compared with respect to runtime, accuracy and amount of fill-in. The paper introduces a proof that the block triangular form of bus admittance matrices will have no non-zero entries in the off-diagonal. KLU factorization is found to perform almost twice as fast as the standard LU factorization with no cost of accuracy. It is, however, shown that the largest computational workload is associated with dense matrix multiplications. An incomplete method reduces the fill-in of coefficient matrices at the cost of accuracy in Thevenin voltages. It is shown, that inaccuracies are amplified as the L-index approaches the stability limit.
KW - Power system analysis computing
KW - Real-time assessment
KW - Thevenin equivalent
KW - Wide-area monitoring
KW - Power system stability indicators
U2 - 10.23919/PSCC.2018.8442893
DO - 10.23919/PSCC.2018.8442893
M3 - Article in proceedings
SN - 9781910963104
SP - 7 pp.
BT - Proceedings of 2018 Power Systems Computation Conference
PB - IEEE
ER -