Voltage Reactive Security Analysis in Power Systems with Automatic Secondary Voltage Control

Victor Levi, Dragan Popovic, Milan Calovic

    Research output: Contribution to journalArticlepeer-review


    The complete methodology for the steady-state voltage/reactive security analysis of power systems with automatic secondary voltage control is proposed Both the decentralised and the co-ordinated control concepts are incorporated in a comprehensive procedure, consisting of three principal steps: contingency selection, contingency analysis and corrective control. The contingency selection stage is based on the extended load flow model and a new voltage/reactive performance index. The contingency analysis is performed next, by using either the extended load flow model (for decentralised control), or the optimum power flow model (for co-ordinated control). Finally, a simplified linear programming model for corrective resetting of pilot-bus set-point voltages is proposed with the aim to increase voltage security margins. The complete methodology was verified on the eastern part of high-voltage power system of former Yugoslavia.
    Original languageEnglish
    Pages (from-to)177-183
    Number of pages7
    JournalIEE Proceedings: Generation, Transmission and Distribution
    Issue number3
    Publication statusPublished - May 1994


    • Critical contingencies; iteration screening; Power system voltage control


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