Conference paper
Real-Time Thevenin Impedance Computation
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, we develop an algorithm for computing Thevenin impedances an order of magnitude faster than previous approaches.
We test the factor-and-solve algorithm with data from several power grids of varying complexity, and we show how the algorithm allows realtime stability assessment of complex power grids at millisecond time scale.
| Language: | English |
|---|---|
| Publisher: | IEEE |
| Year: | 2013 |
| Pages: | 1-6 |
| Proceedings: | 2013 IEEE PES Innovative Smart Grid Technologies Conference |
| ISBN: | 1467348945 , 9781467348942 , 1467348953 , 1467348961 , 9781467348959 and 9781467348966 |
| Types: | Conference paper |
| DOI: | 10.1109/ISGT.2013.6497824 |
| ORCIDs: | Jóhannsson, Hjörtur |
distributed energy sources distributed power generation factor-and-solve algorithm grid operating state properties matrix decomposition matrix factorization noncontrollable renewable energy sources power grids power production power system security power system security operation power system stability power system stability operation real-time Thevenin impedance computation real-time stability assessment renewable energy sources
