TY - GEN

T1 - Binary Search and Fit Algorithm for Improved Voltage Stability Boundary Monitoring

AU - Jørgensen, Christina Hildebrandt Luthje

AU - Karatas, Bahtiyar Can

AU - Jóhannsson, Hjörtur

AU - Sommer, Stefan

PY - 2019/9/1

Y1 - 2019/9/1

N2 - This paper introduces a binary search algorithm using second order polynomial fitting to efficiently determine the maximum power transfer to a non-controlled load when accounting for variations in Thévenin voltage magnitude due to non-linearity. This is used for voltage stability boundary monitoring of a power system in real time. The binary search with polynomial fitting (BSPF) is compared to a reference algorithm, which sweeps over different load levels, and a binary search and is shown to improve both runtime and accuracy of results. The assessment method can take advantage of parallelization, which together with the BSPF algorithm makes it possible to determine a margin for each of the 2.000 non-controlled loads in a 3.000 bus test system in less than 6 seconds. This enables early detection of voltage instability in highly dynamic future smart grid based power systems.

AB - This paper introduces a binary search algorithm using second order polynomial fitting to efficiently determine the maximum power transfer to a non-controlled load when accounting for variations in Thévenin voltage magnitude due to non-linearity. This is used for voltage stability boundary monitoring of a power system in real time. The binary search with polynomial fitting (BSPF) is compared to a reference algorithm, which sweeps over different load levels, and a binary search and is shown to improve both runtime and accuracy of results. The assessment method can take advantage of parallelization, which together with the BSPF algorithm makes it possible to determine a margin for each of the 2.000 non-controlled loads in a 3.000 bus test system in less than 6 seconds. This enables early detection of voltage instability in highly dynamic future smart grid based power systems.

KW - Power system analysis computing

KW - Power system stability

KW - Real-time assessment

KW - Thévenin equivalent

U2 - 10.1109/ISGTEurope.2019.8905466

DO - 10.1109/ISGTEurope.2019.8905466

M3 - Article in proceedings

T3 - Proceedings of 2019 IEEE PES Innovative Smart Grid Technologies Europe, ISGT-Europe 2019

BT - Proceedings of 2019 IEEE PES Innovative Smart Grid Technologies Europe, ISGT-Europe 2019

PB - IEEE

T2 - 2019 IEEE PES Innovative Smart Grid Technologies Europe, ISGT-Europe 2019

Y2 - 29 September 2019 through 2 October 2019

ER -