Dear all, I have a questions concerning the modelling of branches and I'm referring to the MATPOWER 4.0b1 User's Manual.
1. In chapter 3.2 the first sentence states: All transmission lines, transformers and phase shifters are modeled with a common branch model, consisting of a standard π transmission line model, with series impedance z_s = r_s + jx_s and total charging capacitance b_c , in series with an ideal phase shifting transformer. Note: b_c is defined as *total charging capacitance*. 2. In chapter 3.5 the letter b is used in the formula y_sh = g_sh + jb_sh Note: In this context, b seems to be used as a *susceptance*. 3. In Appendix B, Table B-3 on page 79 I cannot find any capacitance, but there is the *total line charging susceptance (p.u.)* in column 5. As susceptance and capacitance are related but not the same, the statements of the manual seem contradictory to me. What does b in the common branch model stand for, the capacitance or the susceptance? Best regards, Raphaël Kaiser
