Improvement of Thevenin Equivalent Parameters and Computations

Abstract:

In this paper, the conventional method to acquire Thevenin equivalent parameters is described. The method is based on features of power systems and utilizes the base-case system information. Considering the impact of loads on Thevenin equivalent potential and impedance, this paper makes improvements and brings it closer to the actual situation. The necessary condition about limit power transmission is derived, and the impedance modulus margin can be used to determine voltage stability of power system. Finally, the results of IEEE-14 bus system calculations show effectiveness of the method.

• Periodical: Advanced Materials Research (Volumes 516-517)
• Pages: 1376-1381
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.516-517.1376
• Online since: May 2012
• Authors: Ming Qiang Wang, Wei Wei Zou, Xiao Hua Zhou
• Keywords: Impedance Modulus Margin, Limit Transmission Power, Thevenin Equivalent, Voltage Stability

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