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Effect of overexcitation limiters on power system long-term modeling

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4 Author(s)
Vournas, C.D. ; Lab. of Electr. Energy Syst., Nat. Tech. Univ. of Athens, Greece ; Manos, G.A. ; Sauer, P.W. ; Pai, M.A.

In this paper we analyze the dynamic performance of a power system with generators operating under rotor current limitation considering various models of takeover and summed-type overexcitation limiters (OELs). It is shown that in certain cases the field current limitation introduces slow generator dynamics that interact with long-term dynamic devices, such as LTCs, whereas in other cases the generator dynamics remain fast even after the limitation of rotor current. Equations suitable for a quasi steady state (qss) simulation corresponding to several OEL dynamic models are derived and the results are compared to those obtained by a full simulation

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Energy Conversion, IEEE Transactions on  (Volume:14 ,  Issue: 4 )