Table 5 Results of mode matching
From: Improvements for electromechanical oscillation mode estimation via subspace identification methods
Mode | Information from mode shapes | Matching result | |
|---|---|---|---|
Μ + | Μ − | ||
EST 1 | \( {\mathrm{G}}_1^{\hbox{'}} \) \( {\mathrm{G}}_3^{\hbox{'}} \) | \( {\mathrm{G}}_2^{\hbox{'}} \) \( {\mathrm{G}}_4^{\hbox{'}} \) | N/A |
EST 2 | \( {\mathrm{G}}_3^{\hbox{'}} \) \( {\mathrm{G}}_4^{\hbox{'}} \) | \( {\mathrm{G}}_1^{\hbox{'}} \) \( {\mathrm{G}}_2^{\hbox{'}} \) | Local mode 5 |
EST 3 | \( {\mathrm{G}}_3^{\hbox{'}} \) | \( {\mathrm{G}}_1^{\hbox{'}} \) \( {\mathrm{G}}_2^{\hbox{'}} \) \( {\mathrm{G}}_4^{\hbox{'}} \) | N/A |
EST 4 | \( {\mathrm{G}}_1^{\hbox{'}} \) \( {\mathrm{G}}_4^{\hbox{'}} \) | \( {\mathrm{G}}_2^{\hbox{'}} \) \( {\mathrm{G}}_3^{\hbox{'}} \) | Local mode 1 |
EST 5 | \( {\mathrm{G}}_1^{\hbox{'}} \) \( {\mathrm{G}}_2^{\hbox{'}} \) \( {\mathrm{G}}_3^{\hbox{'}} \) | \( {\mathrm{G}}_4^{\hbox{'}} \) | Inter-area mode |