Journal article
Early Prevention Method for Power System Instability
This paper presents a method to determine suitable countermeasures against emerging aperiodic small disturbance rotor angle (ASD) instability. The method utilizes stability indicators, computed in real time, to define a criterion for ASD stability. Sensitivities of these stability i ndicators are then determined and used to identify the most in fl uential nodes for counter measures.
To increase the computational speed, only nodes visited by a self-propagating graph, rooted at the vulnerable generator, will have their sensitivities calculated. The steady state voltages after a given counter measure are then determined, using a grid transformation coefficient (GTC) and a numerical, iterative solution to an equation system.
The stability criteriacan then be assessed to evaluate the sufficiency of a suggested counter measure. The method is demonstrated on a synthetic 8-bus network and a 464-bus model of the Western Denm ark transmission grid. The method successfully demonstrates its ability to efficiently identify and evaluate counter measures for a large, practical system.
Language: | English |
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Publisher: | IEEE |
Year: | 2015 |
Pages: | 1784-1792 |
ISSN: | 08858950 and 15580679 |
Types: | Journal article |
DOI: | 10.1109/TPWRS.2014.2353693 |
ORCIDs: | Wittrock, Martin Lindholm , Jóhannsson, Hjörtur and Nielsen, Arne Hejde |