Identification of Weak Nodes in Power System Based on Standard Deviation of Voltage Magnitude

Adedayo A. Yusuff


Voltage stability index, Weak buses, Standard Deviation, Bus criticality index, DigSilent PowerFactory, Python Programming language


Identification of weak buses in an electric power system is important for operational and planning purposes. In this paper, a framework that uses the standard deviation of the magnitude of voltage at load buses is used to identify weak buses. In the framework, reactive power for all load buses are generated simultaneously based on a probability distribution function. The 39-Bus New England test system is used to test the framework in DigSilent PowerFactory in conjunction with Python programming language. The result shows that weak buses can be identified with the framework.

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