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An Approach for Real Power Scheduling to Improve System Stability Margins under Normal and Network Contingencies

Visakha, K and Thukaram, D and Jenkins, Lawrence (2004) An Approach for Real Power Scheduling to Improve System Stability Margins under Normal and Network Contingencies. In: Electric Power Systems Research, 71 (2). pp. 109-117.


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In the present day power system planning and operation, considerable interest is being shown in system security and stability analysis. Pattern of load sharing / generation scheduling that results in heavy flows tend to incur greater losses, threaten stability, security and ultimately making certain generation patterns undesirable. Generation schedules mainly based on economic criteria may lead to lower reserve margins and therefore diminished reliability is a serious concern for the systems. With increased loading of existing power transmission systems, the problem of voltage stability and voltage collapse has also become a major concern in power system planning and operation. While the voltage stability is more dependent on the reactive power sources/voltage profile in the system, it is also a function of real power flows. In this paper, network sensitivity between load voltages and source voltages to compute voltage stability index (L), is used as the basis to evaluate desirable load sharing for improving stability margins. The proposed method has been tested on typical sample systems and also on a practical 24-bus equivalent power system, and results are presented to illustrate the proposed approach.

Item Type: Journal Article
Publication: Electric Power Systems Research
Publisher: Elsevier
Additional Information: Copyright for this article belongs to Elsevier.
Keywords: planning and operation;system security;stability analysis
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Date Deposited: 03 Dec 2004
Last Modified: 19 Sep 2010 04:16
URI: http://eprints.iisc.ac.in/id/eprint/2158

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