Title :
Observed hybrid oscillations in an electrical distribution system
Author :
Donde, Vaibhav ; Hiskens, Ian A.
Author_Institution :
Lawrence Berkeley Nat. Lab., CA, USA
Abstract :
Slow oscillations, with a period of around 15 minutes, were observed in an 11 kV electrical distribution system. Investigations determined that the oscillations were a result of interactions between tap-changing transformers and switched capacitors. Analysis required a hybrid systems framework, due to the non-smooth (switched) nature of these interactions. It was found that the oscillations could be suppressed by adjusting the lower limit of the capacitor deadband. A grazing bifurcation separated oscillatory from steady-state behaviour.
Keywords :
bifurcation; capacitor switching; on load tap changers; oscillations; power distribution control; power system analysis computing; power system stability; 11 kV; capacitor deadband limit; electrical distribution system; grazing bifurcation; hybrid oscillations; hybrid systems framework; switched capacitors; tap-changing transformers; Bifurcation; Capacitors; Cyclotrons; Differential algebraic equations; Hybrid power systems; Laboratories; Limit-cycles; Power system dynamics; Power system modeling; Transformers;
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
DOI :
10.1109/ISCAS.2005.1465552
