On dynamic load models for voltage stability studies
IEEE Transactions on Power Systems, ISSN: 0885-8950, Vol: 12, Issue: 1, Page: 293-303
1997
- 92Citations
- 18Captures
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Article Description
Appropriate modelling of dynamic loads is of primary importance in voltage stability studies. The paper deals with the modelling of a load consisting of a static load plus an aggregate of induction motors. The behavior of three simplified models for such a load configuration is compared. The three models are A) a generic non-linear dynamic model of the first order as proposed by Karlsson and Hill, B) a static exponential load plus a dynamic first-order model for the induction motors, C) a static exponential load plus a dynamic third-order model for the induction motors. A power system with a longitudinal structure is chosen as the case-study. It is shown that for the same perturbation (tripping of one of two high-voltage parallel lines) the simulation results are quite different from each other and, in certain cases, only the third-order dynamic model correctly predicts the voltage collapse phenomena at the load bus. An interpretation of the different behavior of the various models is given. © 1996 IEEE.
Bibliographic Details
Institute of Electrical and Electronics Engineers (IEEE)
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