TY - GEN
T1 - Real-time thevenin impedance computation
AU - Sommer, Stefan Horst
AU - Johannsson, H.
PY - 2013
Y1 - 2013
N2 - Stable and secure operation of power systems becomes increasingly difficult when a large share of the power production is based on distributed and non-controllable renewable energy sources. Real-time stability assessment is dependent on very fast computation of different properties of the grid operating state, and strict time constraints are difficult to adhere to as the complexity of the grid increases. Several suggested approaches for real-time stability assessment require Thevenin impedances to be determined for the observed system conditions. By combining matrix factorization, graph reduction, and parallelization, an algorithm for computing Thevenin impedances an order of magnitude faster than previous approaches is developed. The factor-and-solve algorithm is tested with data from several power grids of varying complexity, and experiments show how the algorithm allows real-time stability assessment of complex power grids at millisecond time scale.
AB - Stable and secure operation of power systems becomes increasingly difficult when a large share of the power production is based on distributed and non-controllable renewable energy sources. Real-time stability assessment is dependent on very fast computation of different properties of the grid operating state, and strict time constraints are difficult to adhere to as the complexity of the grid increases. Several suggested approaches for real-time stability assessment require Thevenin impedances to be determined for the observed system conditions. By combining matrix factorization, graph reduction, and parallelization, an algorithm for computing Thevenin impedances an order of magnitude faster than previous approaches is developed. The factor-and-solve algorithm is tested with data from several power grids of varying complexity, and experiments show how the algorithm allows real-time stability assessment of complex power grids at millisecond time scale.
KW - distributed power generation
KW - matrix decomposition
KW - power grids
KW - power system security
KW - power system stability
KW - renewable energy sources
KW - distributed energy sources
KW - factor-and-solve algorithm
KW - grid operating state properties
KW - matrix factorization
KW - noncontrollable renewable energy sources
KW - power production
KW - power system security operation
KW - power system stability operation
KW - real-time Thevenin impedance computation
KW - real-time stability assessment
U2 - 10.1109/ISGT.2013.6497824
DO - 10.1109/ISGT.2013.6497824
M3 - Article in proceedings
SN - 978-1-4673-4894-2
SP - 1
EP - 6
BT - Innovative Smart Grid Technologies (ISGT), 2013 IEEE PES
PB - IEEE
ER -
