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Re-dispatching generation to increase power system security margin and support low voltage bus

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2 Author(s)
Wang, R. ; Dept. of Electr. & Comput. Eng., Wisconsin Univ., Madison, WI, USA ; Lasseter, R.H.

This article proposes a new method to increase a power system's security margin and/or support its low voltage bus by re-dispatching generator outputs, using a normal vector found at a voltage collapse boundary or a low voltage boundary (LVB). This method uses the normal vector as an indicator to change the generation direction so that more power can be transferred before reaching a boundary of a critical limit such as the voltage collapse boundary or LVB, etc. The method has been tested in the simulation on several systems and shows predicted results. It can be applied to many practical power systems to enhance the system's security, or to increase the system's transfer capability. It also provides technical guidance for an open access transmission in a deregulated environment, when bidding results are shown as generation patterns

Published in:

Power Systems, IEEE Transactions on  (Volume:15 ,  Issue: 2 )