Improving the system voltage stability assessment by using advanced reactive power generation models

Conference: Internationaler ETG-Kongress 2013 – Energieversorgung auf dem Weg nach 2050 - Symposium 1: Security in Critical Infrastructures Today
11/05/2013 - 11/06/2013 at Berlin, Deutschland

Proceedings: Internationaler ETG-Kongress 2013 – Energieversorgung auf dem Weg nach 2050

Pages: 6Language: englishTyp: PDF

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Authors:
Loitz, Soenke; Acker, Hendrik; Wellssow, Wolfram H. (Technical University of Kaiserslautern, Germany)

Abstract:
Presently, the active and reactive power limits of the power generation model implemented in the TSO’s system security assessment tools do not respond to the grid’s actual voltage. This model is only accurate as long as the voltage remains within narrow limits. This is outlined with the help of a dynamic simulation which shows the discrepancies of the presently used conventional model under highly stressed system conditions. This paper proposes to improve the accuracy of the system security assessment by implementing voltage dependent reactive power limits of power generation units into a power flow algorithm. The proposed model is compared to the dynamic model to show its advantages in stressed system conditions.