Equal Area Criterion Analysis

This page runs Equal Area Criterion analysis. For infinite impedance, set reactance to 999. If a critical clearing angle (δc) is found, the accelerating region will be shown in pink and the decelerating region in green.

Disclaimer: This tool is provided for educational and illustrative purposes only. Results are provided without warranty and should be independently verified.
One-line diagram
    Pm, Mechanical power (pu).
    E, Machine voltage magnitude (pu).
    H, (MJ/MVA) seconds.
    F, frequency in Hz.

    Pre-Fault

      Thév equiv voltage (pu).
      Resistance (pu).
      Reactance (pu).

    During Fault

      Thév equiv voltage (pu).
      Resistance (pu).
      Reactance (pu).

    Post-Fault

      Thév equiv voltage (pu).
      Resistance (pu).
      Reactance (pu).

Graph with R Graph without R